Checking type of the collection being iterated

idea/testData/intentions/loopToCallChain/array.kt

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+fun foo(array: Array<String>): String? {
+    <caret>for (s in array) {
+        if (s.isNotBlank()) {
+            return s
+        }
+    }
+    return null
+}

idea/testData/intentions/loopToCallChain/array.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun foo(array: Array<String>): String? {
+    <caret>return array.firstOrNull { it.isNotBlank() }
+}

idea/testData/intentions/loopToCallChain/customTypeWithIterator.kt

@@ -0,0 +1,16 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+class X {
+    operator fun iterator(): Iterator<String>{
+        return emptyList<String>().iterator()
+    }
+}
+
+fun foo(x: X): String? {
+    <caret>for (s in x) {
+        if (s.isNotBlank()) {
+            return s
+        }
+    }
+    return null
+}

idea/testData/intentions/loopToCallChain/intArray.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+import java.util.ArrayList
+
+fun foo(array: IntArray): List<Int> {
+    val result = ArrayList<Int>()
+    <caret>for (i in array) {
+        if (i % 3 == 0) {
+            result.add(i)
+        }
+    }
+    return result
+}

idea/testData/intentions/loopToCallChain/intArray.kt.after

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+import java.util.ArrayList
+
+fun foo(array: IntArray): List<Int> {
+    val result = array.filter { it % 3 == 0 }
+    return result
+}

idea/testData/intentions/loopToCallChain/range.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+import java.util.*
+
+fun foo(): List<Int> {
+    val result = ArrayList<Int>()
+    <caret>for (i in 1..10) {
+        if (i % 3 == 0) {
+            result.add(i)
+        }
+    }
+    return result
+}

idea/testData/intentions/loopToCallChain/range.kt.after

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+import java.util.*
+
+fun foo(): List<Int> {
+    val <caret>result = (1..10).filter { it % 3 == 0 }
+    return result
+}