diff --git a/js/js.libraries/src/core/kotlin.kt b/js/js.libraries/src/core/kotlin.kt
index 219612926b3..a7d14df3900 100644
--- a/js/js.libraries/src/core/kotlin.kt
+++ b/js/js.libraries/src/core/kotlin.kt
@@ -61,3 +61,22 @@ public fun lazy<T>(initializer: () -> T): Lazy<T> = UnsafeLazyImpl(initializer)
  *
  * The [mode] parameter is ignored. */
 public fun lazy<T>(mode: LazyThreadSafetyMode, initializer: () -> T): Lazy<T> = UnsafeLazyImpl(initializer)
+
+
+private fun arrayCopyResize(source: dynamic, newSize: Int, defaultValue: Any?): dynamic {
+    val result = source.slice(0, newSize)
+    var index: Int = source.length
+    if (newSize > index) {
+        result.length = newSize
+        while (index < newSize) result[index++] = defaultValue
+    }
+    return result
+}
+
+private fun <T> arrayPlusCollection(array: dynamic, collection: Collection<T>): dynamic {
+    val result = array.slice(0)
+    result.length += collection.size()
+    var index: Int = array.length
+    for (element in collection) result[index++] = element
+    return result
+}
\ No newline at end of file
diff --git a/js/js.libraries/src/core/kotlin_special.kt b/js/js.libraries/src/core/kotlin_special.kt
index a04427d27d2..897655626a6 100644
--- a/js/js.libraries/src/core/kotlin_special.kt
+++ b/js/js.libraries/src/core/kotlin_special.kt
@@ -75,3 +75,426 @@ public inline fun ShortArray.asList(): List<Short> {
     return (this as Array<Short>).asList()
 }
 
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun <T> Array<out T>.copyOf(): Array<T> {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun BooleanArray.copyOf(): BooleanArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun ByteArray.copyOf(): ByteArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun CharArray.copyOf(): CharArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun DoubleArray.copyOf(): DoubleArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun FloatArray.copyOf(): FloatArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun IntArray.copyOf(): IntArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun LongArray.copyOf(): LongArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun ShortArray.copyOf(): ShortArray {
+    return (this: dynamic).slice(0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun BooleanArray.copyOf(newSize: Int): BooleanArray {
+    return arrayCopyResize(this, newSize, false)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun ByteArray.copyOf(newSize: Int): ByteArray {
+    return arrayCopyResize(this, newSize, 0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun CharArray.copyOf(newSize: Int): CharArray {
+    return arrayCopyResize(this, newSize, '\u0000')
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun ShortArray.copyOf(newSize: Int): ShortArray {
+    return arrayCopyResize(this, newSize, 0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun IntArray.copyOf(newSize: Int): IntArray {
+    return arrayCopyResize(this, newSize, 0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun LongArray.copyOf(newSize: Int): LongArray {
+    return arrayCopyResize(this, newSize, 0L)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun FloatArray.copyOf(newSize: Int): FloatArray {
+    return arrayCopyResize(this, newSize, 0.0f)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun DoubleArray.copyOf(newSize: Int): DoubleArray {
+    return arrayCopyResize(this, newSize, 0.0)
+}
+
+/**
+ * Returns new array which is a copy of the original array.
+ */
+public fun <T> Array<out T>.copyOf(newSize: Int): Array<T?> {
+    return arrayCopyResize(this, newSize, null)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun <T> Array<out T>.copyOfRange(from: Int, to: Int): Array<T> {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun BooleanArray.copyOfRange(from: Int, to: Int): BooleanArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun ByteArray.copyOfRange(from: Int, to: Int): ByteArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun CharArray.copyOfRange(from: Int, to: Int): CharArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun DoubleArray.copyOfRange(from: Int, to: Int): DoubleArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun FloatArray.copyOfRange(from: Int, to: Int): FloatArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun IntArray.copyOfRange(from: Int, to: Int): IntArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun LongArray.copyOfRange(from: Int, to: Int): LongArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns new array which is a copy of range of original array.
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun ShortArray.copyOfRange(from: Int, to: Int): ShortArray {
+    return (this: dynamic).slice(from, to)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun <T> Array<out T>.plus(array: Array<out T>): Array<out T> {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun BooleanArray.plus(array: BooleanArray): BooleanArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun ByteArray.plus(array: ByteArray): ByteArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun CharArray.plus(array: CharArray): CharArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun DoubleArray.plus(array: DoubleArray): DoubleArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun FloatArray.plus(array: FloatArray): FloatArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun IntArray.plus(array: IntArray): IntArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun LongArray.plus(array: LongArray): LongArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+suppress("NOTHING_TO_INLINE")
+public inline fun ShortArray.plus(array: ShortArray): ShortArray {
+    return (this: dynamic).concat(array)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun <T> Array<out T>.plus(collection: Collection<T>): Array<out T> {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun BooleanArray.plus(collection: Collection<Boolean>): BooleanArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun ByteArray.plus(collection: Collection<Byte>): ByteArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun CharArray.plus(collection: Collection<Char>): CharArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun DoubleArray.plus(collection: Collection<Double>): DoubleArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun FloatArray.plus(collection: Collection<Float>): FloatArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun IntArray.plus(collection: Collection<Int>): IntArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun LongArray.plus(collection: Collection<Long>): LongArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun ShortArray.plus(collection: Collection<Short>): ShortArray {
+    return arrayPlusCollection(this, collection)
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun <T> Array<out T>.plus(element: T): Array<out T> {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as Array<out T>
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun BooleanArray.plus(element: Boolean): BooleanArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as BooleanArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun ByteArray.plus(element: Byte): ByteArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as ByteArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun CharArray.plus(element: Char): CharArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as CharArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun DoubleArray.plus(element: Double): DoubleArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as DoubleArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun FloatArray.plus(element: Float): FloatArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as FloatArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun IntArray.plus(element: Int): IntArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as IntArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun LongArray.plus(element: Long): LongArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as LongArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun ShortArray.plus(element: Short): ShortArray {
+    val result = this.copyOf()
+    (result: dynamic).push(element)
+    return result as ShortArray
+}
+
diff --git a/libraries/stdlib/src/generated/_Generators.kt b/libraries/stdlib/src/generated/_Generators.kt
index f458dd2d021..5fc48ae7361 100644
--- a/libraries/stdlib/src/generated/_Generators.kt
+++ b/libraries/stdlib/src/generated/_Generators.kt
@@ -598,35 +598,35 @@ public inline fun String.partition(predicate: (Char) -> Boolean): Pair<String, S
 }
 
 /**
- * Returns a list containing all elements of original collection and then all elements of the given [array].
+ * Returns a list containing all elements of the original collection and then all elements of the given [array].
  */
 public fun <T> Collection<T>.plus(array: Array<out T>): List<T> {
-    val answer = ArrayList<T>(this.size() + array.size())
-    answer.addAll(this)
-    answer.addAll(array)
-    return answer
+    val result = ArrayList<T>(this.size() + array.size())
+    result.addAll(this)
+    result.addAll(array)
+    return result
 }
 
 /**
- * Returns a list containing all elements of original collection and then all elements of the given [array].
+ * Returns a list containing all elements of the original collection and then all elements of the given [array].
  */
 public fun <T> Iterable<T>.plus(array: Array<out T>): List<T> {
     if (this is Collection) return this.plus(array)
-    val answer = ArrayList<T>()
-    answer.addAll(this)
-    answer.addAll(array)
-    return answer
+    val result = ArrayList<T>()
+    result.addAll(this)
+    result.addAll(array)
+    return result
 }
 
 /**
- * Returns a list containing all elements of original collection and then all elements of the given [array].
+ * Returns a sequence containing all elements of original sequence and then all elements of the given [array].
  */
 public fun <T> Sequence<T>.plus(array: Array<out T>): Sequence<T> {
     return this.plus(array.asList())
 }
 
 /**
- * Returns a list containing all elements of original collection and then all elements of the given [array].
+ * Returns a set containing all elements both of the original set and the given [array].
  */
 public fun <T> Set<T>.plus(array: Array<out T>): Set<T> {
     val result = LinkedHashSet<T>(mapCapacity(this.size() + array.size()))
@@ -635,92 +635,14 @@ public fun <T> Set<T>.plus(array: Array<out T>): Set<T> {
     return result
 }
 
-public fun <T> Array<out T>.plus(collection: Collection<T>): Array<out T> {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as Array<out T>
-}
-
-public fun BooleanArray.plus(collection: Collection<Boolean>): BooleanArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as BooleanArray
-}
-
-public fun ByteArray.plus(collection: Collection<Byte>): ByteArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as ByteArray
-}
-
-public fun CharArray.plus(collection: Collection<Char>): CharArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as CharArray
-}
-
-public fun DoubleArray.plus(collection: Collection<Double>): DoubleArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as DoubleArray
-}
-
-public fun FloatArray.plus(collection: Collection<Float>): FloatArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as FloatArray
-}
-
-public fun IntArray.plus(collection: Collection<Int>): IntArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as IntArray
-}
-
-public fun LongArray.plus(collection: Collection<Long>): LongArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as LongArray
-}
-
-public fun ShortArray.plus(collection: Collection<Short>): ShortArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as ShortArray
-}
-
+/**
+ * Returns a list containing all elements of the original collection and then all elements of the given [collection].
+ */
 public fun <T> Collection<T>.plus(collection: Collection<T>): List<T> {
-    val answer = ArrayList<T>(this.size() + collection.size())
-    answer.addAll(this)
-    answer.addAll(collection)
-    return answer
+    val result = ArrayList<T>(this.size() + collection.size())
+    result.addAll(this)
+    result.addAll(collection)
+    return result
 }
 
 /**
@@ -728,9 +650,9 @@ public fun <T> Collection<T>.plus(collection: Collection<T>): List<T> {
  */
 public fun <T> Collection<T>.plus(collection: Iterable<T>): List<T> {
     if (collection is Collection) return this.plus(collection)
-    val answer = ArrayList<T>(this)
-    answer.addAll(collection)
-    return answer
+    val result = ArrayList<T>(this)
+    result.addAll(collection)
+    return result
 }
 
 /**
@@ -738,21 +660,21 @@ public fun <T> Collection<T>.plus(collection: Iterable<T>): List<T> {
  */
 public fun <T> Iterable<T>.plus(collection: Iterable<T>): List<T> {
     if (this is Collection) return this.plus(collection)
-    val answer = ArrayList<T>(0)
-    answer.addAll(this)
-    answer.addAll(collection)
-    return answer
+    val result = ArrayList<T>()
+    result.addAll(this)
+    result.addAll(collection)
+    return result
 }
 
 /**
- * Returns a sequence containing all elements of original sequence and then all elements of the given [collection]
+ * Returns a sequence containing all elements of original sequence and then all elements of the given [collection].
  */
 public fun <T> Sequence<T>.plus(collection: Iterable<T>): Sequence<T> {
     return sequenceOf(this, collection.asSequence()).flatten()
 }
 
 /**
- * Returns a list containing all elements of the original collection and then all elements of the given [collection].
+ * Returns a set containing all elements both of the original set and the given [collection].
  */
 public fun <T> Set<T>.plus(collection: Iterable<T>): Set<T> {
     val result = LinkedHashSet<T>(mapCapacity(collection.collectionSizeOrNull()?.let { this.size() + it } ?: this.size() * 2))
@@ -761,176 +683,14 @@ public fun <T> Set<T>.plus(collection: Iterable<T>): Set<T> {
     return result
 }
 
-public fun <T> Array<out T>.plus(collection: Array<out T>): Array<out T> {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as Array<out T>
-}
-
-public fun BooleanArray.plus(collection: BooleanArray): BooleanArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as BooleanArray
-}
-
-public fun ByteArray.plus(collection: ByteArray): ByteArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as ByteArray
-}
-
-public fun CharArray.plus(collection: CharArray): CharArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as CharArray
-}
-
-public fun DoubleArray.plus(collection: DoubleArray): DoubleArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as DoubleArray
-}
-
-public fun FloatArray.plus(collection: FloatArray): FloatArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as FloatArray
-}
-
-public fun IntArray.plus(collection: IntArray): IntArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as IntArray
-}
-
-public fun LongArray.plus(collection: LongArray): LongArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as LongArray
-}
-
-public fun ShortArray.plus(collection: ShortArray): ShortArray {
-    val thisSize = size()
-    val answer = this.copyOf(thisSize + collection.size())
-    collection.forEachIndexed { i, element ->
-        answer[thisSize + i] = element
-    }
-    return answer as ShortArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun <T> Array<out T>.plus(element: T): Array<out T> {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as Array<out T>
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun BooleanArray.plus(element: Boolean): BooleanArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as BooleanArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun ByteArray.plus(element: Byte): ByteArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as ByteArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun CharArray.plus(element: Char): CharArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as CharArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun DoubleArray.plus(element: Double): DoubleArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as DoubleArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun FloatArray.plus(element: Float): FloatArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as FloatArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun IntArray.plus(element: Int): IntArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as IntArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun LongArray.plus(element: Long): LongArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as LongArray
-}
-
-/**
- * Returns an array containing all elements of the original array and then the given [element].
- */
-public fun ShortArray.plus(element: Short): ShortArray {
-    val answer = this.copyOf(size() + 1)
-    answer[size()] = element
-    return answer as ShortArray
-}
-
 /**
  * Returns a list containing all elements of the original collection and then the given [element].
  */
 public fun <T> Collection<T>.plus(element: T): List<T> {
-    val answer = ArrayList<T>(size() + 1)
-    answer.addAll(this)
-    answer.add(element)
-    return answer
+    val result = ArrayList<T>(size() + 1)
+    result.addAll(this)
+    result.add(element)
+    return result
 }
 
 /**
@@ -938,10 +698,10 @@ public fun <T> Collection<T>.plus(element: T): List<T> {
  */
 public fun <T> Iterable<T>.plus(element: T): List<T> {
     if (this is Collection) return this.plus(element)
-    val answer = ArrayList<T>()
-    answer.addAll(this)
-    answer.add(element)
-    return answer
+    val result = ArrayList<T>()
+    result.addAll(this)
+    result.add(element)
+    return result
 }
 
 /**
@@ -955,10 +715,10 @@ public fun <T> Sequence<T>.plus(element: T): Sequence<T> {
  * Returns a set containing all elements of the original set and then the given [element].
  */
 public fun <T> Set<T>.plus(element: T): Set<T> {
-    val copyOfSet = LinkedHashSet<T>(mapCapacity(size() + 1))
-    copyOfSet.addAll(this)
-    copyOfSet.add(element)
-    return copyOfSet
+    val result = LinkedHashSet<T>(mapCapacity(size() + 1))
+    result.addAll(this)
+    result.add(element)
+    return result
 }
 
 /**
diff --git a/libraries/stdlib/src/generated/_SpecialJVM.kt b/libraries/stdlib/src/generated/_SpecialJVM.kt
index 79880f368fe..9aa542ba942 100644
--- a/libraries/stdlib/src/generated/_SpecialJVM.kt
+++ b/libraries/stdlib/src/generated/_SpecialJVM.kt
@@ -544,6 +544,294 @@ public fun <C : MutableCollection<in R>, R> Sequence<*>.filterIsInstanceTo(desti
     return destination
 }
 
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun <T> Array<out T>.plus(array: Array<out T>): Array<out T> {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as Array<out T>
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun BooleanArray.plus(array: BooleanArray): BooleanArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as BooleanArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun ByteArray.plus(array: ByteArray): ByteArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as ByteArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun CharArray.plus(array: CharArray): CharArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as CharArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun DoubleArray.plus(array: DoubleArray): DoubleArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as DoubleArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun FloatArray.plus(array: FloatArray): FloatArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as FloatArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun IntArray.plus(array: IntArray): IntArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as IntArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun LongArray.plus(array: LongArray): LongArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as LongArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [array].
+ */
+public fun ShortArray.plus(array: ShortArray): ShortArray {
+    val thisSize = size()
+    val arraySize = array.size()
+    val result = this.copyOf(thisSize + arraySize)
+    System.arraycopy(array, 0, result, thisSize, arraySize)
+    return result as ShortArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun <T> Array<out T>.plus(collection: Collection<T>): Array<out T> {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as Array<out T>
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun BooleanArray.plus(collection: Collection<Boolean>): BooleanArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as BooleanArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun ByteArray.plus(collection: Collection<Byte>): ByteArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as ByteArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun CharArray.plus(collection: Collection<Char>): CharArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as CharArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun DoubleArray.plus(collection: Collection<Double>): DoubleArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as DoubleArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun FloatArray.plus(collection: Collection<Float>): FloatArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as FloatArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun IntArray.plus(collection: Collection<Int>): IntArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as IntArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun LongArray.plus(collection: Collection<Long>): LongArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as LongArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then all elements of the given [collection].
+ */
+public fun ShortArray.plus(collection: Collection<Short>): ShortArray {
+    val thisSize = size()
+    val result = this.copyOf(thisSize + collection.size())
+    collection.forEachIndexed { i, element ->
+        result[thisSize + i] = element
+    }
+    return result as ShortArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun <T> Array<out T>.plus(element: T): Array<out T> {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as Array<out T>
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun BooleanArray.plus(element: Boolean): BooleanArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as BooleanArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun ByteArray.plus(element: Byte): ByteArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as ByteArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun CharArray.plus(element: Char): CharArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as CharArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun DoubleArray.plus(element: Double): DoubleArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as DoubleArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun FloatArray.plus(element: Float): FloatArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as FloatArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun IntArray.plus(element: Int): IntArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as IntArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun LongArray.plus(element: Long): LongArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as LongArray
+}
+
+/**
+ * Returns an array containing all elements of the original array and then the given [element].
+ */
+public fun ShortArray.plus(element: Short): ShortArray {
+    val result = this.copyOf(size() + 1)
+    result[size()] = element
+    return result as ShortArray
+}
+
 /**
  * Sorts array or range in array inplace.
  */
diff --git a/libraries/stdlib/test/collections/ArraysTest.kt b/libraries/stdlib/test/collections/ArraysTest.kt
index ff1dbf37519..7752eee1c2b 100644
--- a/libraries/stdlib/test/collections/ArraysTest.kt
+++ b/libraries/stdlib/test/collections/ArraysTest.kt
@@ -210,13 +210,21 @@ class ArraysTest {
     }
 
     test fun plus() {
-        assertEquals(listOf("1", "2", "3", "4"), arrayOf("1", "2") + arrayOf("3", "4"))
         assertEquals(listOf("1", "2", "3", "4"), listOf("1", "2") + arrayOf("3", "4"))
+        val arr = arrayOf("1", "2") + arrayOf("3", "4")
+        assertEquals(4, arr.size())
+        checkContent(arr.iterator(), 4) { (it + 1).toString() }
     }
 
     test fun plusVararg() {
-        fun onePlus(vararg a: String) = arrayOf("1") + a
-        assertEquals(listOf("1", "2"), onePlus("2"))
+        fun stringOnePlus(vararg a: String) = arrayOf("1") + a
+        fun numberOnePlus(vararg a: Int) = intArrayOf(1) + a
+
+        val arrS = stringOnePlus("2")
+        checkContent(arrS.iterator(), 2) { (it + 1).toString() }
+
+        val arrN = numberOnePlus(2)
+        checkContent(arrN.iterator(), 2) { it + 1 }
     }
 
     test fun first() {
diff --git a/libraries/tools/kotlin-stdlib-gen/src/templates/Generators.kt b/libraries/tools/kotlin-stdlib-gen/src/templates/Generators.kt
index 84db08671e1..a2606c501c3 100644
--- a/libraries/tools/kotlin-stdlib-gen/src/templates/Generators.kt
+++ b/libraries/tools/kotlin-stdlib-gen/src/templates/Generators.kt
@@ -6,48 +6,37 @@ fun generators(): List<GenericFunction> {
     val templates = arrayListOf<GenericFunction>()
 
     templates add f("plus(element: T)") {
-        exclude(Strings)
+        only(Iterables, Collections, Sets, Sequences)
         doc { "Returns a list containing all elements of the original collection and then the given [element]." }
         returns("List<T>")
-        returns("SELF", ArraysOfObjects, ArraysOfPrimitives, Sets, Sequences)
         body {
             """
             if (this is Collection) return this.plus(element)
-            val answer = ArrayList<T>()
-            answer.addAll(this)
-            answer.add(element)
-            return answer
+            val result = ArrayList<T>()
+            result.addAll(this)
+            result.add(element)
+            return result
             """
         }
         body(Collections) {
             """
-            val answer = ArrayList<T>(size() + 1)
-            answer.addAll(this)
-            answer.add(element)
-            return answer
-            """
-        }
-
-
-        doc(ArraysOfObjects, ArraysOfPrimitives) { "Returns an array containing all elements of the original array and then the given [element]." }
-        body(ArraysOfObjects, ArraysOfPrimitives) {
-            """
-            val answer = this.copyOf(size() + 1)
-            answer[size()] = element
-            return answer as SELF
+            val result = ArrayList<T>(size() + 1)
+            result.addAll(this)
+            result.add(element)
+            return result
             """
         }
 
         // TODO: use build scope function when available
         // TODO: use immutable sets when available
-        // TODO: precalculate size
+        returns("SELF", Sets, Sequences)
         doc(Sets) { "Returns a set containing all elements of the original set and then the given [element]." }
         body(Sets) {
             """
-            val copyOfSet = LinkedHashSet<T>(mapCapacity(size() + 1))
-            copyOfSet.addAll(this)
-            copyOfSet.add(element)
-            return copyOfSet
+            val result = LinkedHashSet<T>(mapCapacity(size() + 1))
+            result.addAll(this)
+            result.add(element)
+            return result
             """
         }
 
@@ -67,23 +56,24 @@ fun generators(): List<GenericFunction> {
         body {
             """
             if (this is Collection) return this.plus(collection)
-            val answer = ArrayList<T>(0)
-            answer.addAll(this)
-            answer.addAll(collection)
-            return answer
+            val result = ArrayList<T>()
+            result.addAll(this)
+            result.addAll(collection)
+            return result
             """
         }
         body(Collections) {
             """
             if (collection is Collection) return this.plus(collection)
-            val answer = ArrayList<T>(this)
-            answer.addAll(collection)
-            return answer
+            val result = ArrayList<T>(this)
+            result.addAll(collection)
+            return result
             """
         }
 
         // TODO: try to precalculate size
         // TODO: use immutable set builder when available
+        doc(Sets) { "Returns a set containing all elements both of the original set and the given [collection]." }
         body(Sets) {
             """
             val result = LinkedHashSet<T>(mapCapacity(collection.collectionSizeOrNull()?.let { this.size() + it } ?: this.size() * 2))
@@ -93,7 +83,7 @@ fun generators(): List<GenericFunction> {
             """
         }
 
-        doc(Sequences) { "Returns a sequence containing all elements of original sequence and then all elements of the given [collection]" }
+        doc(Sequences) { "Returns a sequence containing all elements of original sequence and then all elements of the given [collection]." }
         body(Sequences) {
             """
             return sequenceOf(this, collection.asSequence()).flatten()
@@ -102,52 +92,42 @@ fun generators(): List<GenericFunction> {
     }
 
     templates add f("plus(collection: Collection<T>)") {
-        only(Collections, ArraysOfPrimitives, ArraysOfObjects)
+        only(Collections)
+        doc { "Returns a list containing all elements of the original collection and then all elements of the given [collection]." }
         returns("List<T>")
-        returns("SELF", ArraysOfObjects, ArraysOfPrimitives)
-        body(Collections) {
+        body {
             """
-            val answer = ArrayList<T>(this.size() + collection.size())
-            answer.addAll(this)
-            answer.addAll(collection)
-            return answer
-            """
-        }
-        // ?
-        body(ArraysOfObjects, ArraysOfPrimitives) {
-            """
-            val thisSize = size()
-            val answer = this.copyOf(thisSize + collection.size())
-            collection.forEachIndexed { i, element ->
-                answer[thisSize + i] = element
-            }
-            return answer as SELF
+            val result = ArrayList<T>(this.size() + collection.size())
+            result.addAll(this)
+            result.addAll(collection)
+            return result
             """
         }
     }
 
     templates add f("plus(array: Array<out T>)") {
         only(Iterables, Collections, Sets, Sequences)
-        doc { "Returns a list containing all elements of original collection and then all elements of the given [array]." }
+        doc { "Returns a list containing all elements of the original collection and then all elements of the given [array]." }
         returns("List<T>")
         returns("SELF", Sets, Sequences)
         body {
             """
             if (this is Collection) return this.plus(array)
-            val answer = ArrayList<T>()
-            answer.addAll(this)
-            answer.addAll(array)
-            return answer
+            val result = ArrayList<T>()
+            result.addAll(this)
+            result.addAll(array)
+            return result
             """
         }
         body(Collections) {
             """
-            val answer = ArrayList<T>(this.size() + array.size())
-            answer.addAll(this)
-            answer.addAll(array)
-            return answer
+            val result = ArrayList<T>(this.size() + array.size())
+            result.addAll(this)
+            result.addAll(array)
+            return result
             """
         }
+        doc(Sets) { "Returns a set containing all elements both of the original set and the given [array]." }
         body(Sets) {
             """
             val result = LinkedHashSet<T>(mapCapacity(this.size() + array.size()))
@@ -156,6 +136,7 @@ fun generators(): List<GenericFunction> {
             return result
             """
         }
+        doc(Sequences) { "Returns a sequence containing all elements of original sequence and then all elements of the given [array]." }
         body(Sequences) {
             """
             return this.plus(array.asList())
@@ -163,20 +144,6 @@ fun generators(): List<GenericFunction> {
         }
     }
 
-    templates add f("plus(collection: SELF)") {
-        only(ArraysOfObjects, ArraysOfPrimitives)
-        returns("SELF")
-        body {
-            """
-            val thisSize = size()
-            val answer = this.copyOf(thisSize + collection.size())
-            collection.forEachIndexed { i, element ->
-                answer[thisSize + i] = element
-            }
-            return answer as SELF
-            """
-        }
-    }
 
     templates add f("plus(sequence: Sequence<T>)") {
         only(Sequences)
diff --git a/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJS.kt b/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJS.kt
index 7caf0eae313..18bd82d9717 100644
--- a/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJS.kt
+++ b/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJS.kt
@@ -21,5 +21,98 @@ fun specialJS(): List<GenericFunction> {
         body(ArraysOfPrimitives) {"""return (this as Array<T>).asList()"""}
     }
 
+    templates add f("copyOfRange(from: Int, to: Int)") {
+        // TODO: Arguments checking as in java?
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        doc { "Returns new array which is a copy of range of original array." }
+        inline(true)
+        annotations("""suppress("NOTHING_TO_INLINE")""")
+        returns("SELF")
+        returns(ArraysOfObjects) { "Array<T>" }
+        body {
+            "return (this: dynamic).slice(from, to)"
+        }
+    }
+
+    templates add f("copyOf()") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        doc { "Returns new array which is a copy of the original array." }
+        inline(true)
+        annotations("""suppress("NOTHING_TO_INLINE")""")
+        returns("SELF")
+        returns(ArraysOfObjects) { "Array<T>" }
+        body {
+            "return (this: dynamic).slice(0)"
+        }
+    }
+
+    val allArrays = PrimitiveType.defaultPrimitives.map { ArraysOfPrimitives to it } + (ArraysOfObjects to null)
+    templates addAll allArrays.map {
+            val (family, primitive) = it
+            f("copyOf(newSize: Int)") {
+                only(family)
+                val defaultValue: String
+                if (primitive != null) {
+                    returns("SELF")
+                    only(primitive)
+                    defaultValue = when (primitive) {
+                        PrimitiveType.Boolean -> false.toString()
+                        PrimitiveType.Char -> "'\\u0000'"
+                        else -> "ZERO"
+                    }
+                } else {
+                    returns(ArraysOfObjects) { "Array<T?>" }
+                    defaultValue = "null"
+                }
+                doc { "Returns new array which is a copy of the original array." }
+                body {
+                    """
+                    return arrayCopyResize(this, newSize, $defaultValue)
+                    """
+                }
+            }
+        }
+
+
+    templates add f("plus(element: T)") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        returns("SELF")
+        doc { "Returns an array containing all elements of the original array and then the given [element]." }
+        body(ArraysOfObjects, ArraysOfPrimitives) {
+            """
+            val result = this.copyOf()
+            (result: dynamic).push(element)
+            return result as SELF
+            """
+        }
+    }
+
+    templates add f("plus(collection: Collection<T>)") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        returns("SELF")
+        doc { "Returns an array containing all elements of the original array and then all elements of the given [collection]." }
+        body {
+            """
+            return arrayPlusCollection(this, collection)
+            """
+        }
+    }
+
+    // This overload can cause nulls if array size is expanding, hence different return overload
+    templates add f("plus(array: SELF)") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        doc { "Returns an array containing all elements of the original array and then all elements of the given [array]." }
+        inline(true)
+        annotations("""suppress("NOTHING_TO_INLINE")""")
+        returns("SELF")
+        body {
+            """
+            return (this: dynamic).concat(array)
+            """
+        }
+    }
+
+
+
     return templates
 }
\ No newline at end of file
diff --git a/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJVM.kt b/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJVM.kt
index 3cd1e713263..7a17e3a7bcd 100644
--- a/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJVM.kt
+++ b/libraries/tools/kotlin-stdlib-gen/src/templates/SpecialJVM.kt
@@ -5,6 +5,51 @@ import templates.Family.*
 fun specialJVM(): List<GenericFunction> {
     val templates = arrayListOf<GenericFunction>()
 
+    templates add f("plus(element: T)") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        returns("SELF")
+        doc { "Returns an array containing all elements of the original array and then the given [element]." }
+        body(ArraysOfObjects, ArraysOfPrimitives) {
+            """
+            val result = this.copyOf(size() + 1)
+            result[size()] = element
+            return result as SELF
+            """
+        }
+    }
+
+    templates add f("plus(collection: Collection<T>)") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        returns("SELF")
+        doc { "Returns an array containing all elements of the original array and then all elements of the given [collection]." }
+        body {
+            """
+            val thisSize = size()
+            val result = this.copyOf(thisSize + collection.size())
+            collection.forEachIndexed { i, element ->
+                result[thisSize + i] = element
+            }
+            return result as SELF
+            """
+        }
+    }
+
+    templates add f("plus(array: SELF)") {
+        only(ArraysOfObjects, ArraysOfPrimitives)
+        doc { "Returns an array containing all elements of the original array and then all elements of the given [array]." }
+        returns("SELF")
+        body {
+            """
+            val thisSize = size()
+            val arraySize = array.size()
+            val result = this.copyOf(thisSize + arraySize)
+            System.arraycopy(array, 0, result, thisSize, arraySize)
+            return result as SELF
+            """
+        }
+    }
+
+
     templates add f("copyOfRange(from: Int, to: Int)") {
         only(ArraysOfObjects, ArraysOfPrimitives)
         doc { "Returns new array which is a copy of range of original array." }