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This commit is contained in:
Andrey Breslav
2013-10-15 20:41:49 +04:00
parent 93dc130e79
commit bed01b601b
6 changed files with 186 additions and 7 deletions
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core/util.runtime/src/org/jetbrains/jet/utils/collections.kt
+20 -1
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@@ -18,10 +18,29 @@ package org.jetbrains.jet.utils
import java.util.LinkedHashMap
public fun <K, V> Iterable<V>.toMap(key: (V) -> K): Map<K, V> {
public fun <K, V> Iterable<V>.valuesToMap(key: (V) -> K): Map<K, V> {
val map = LinkedHashMap<K, V>()
for (v in this) {
map[key(v)] = v
}
return map
}
public fun <K, V> Iterable<K>.keysToMap(value: (K) -> V): Map<K, V> {
val map = LinkedHashMap<K, V>()
for (k in this) {
map[k] = value(k)
}
return map
}
public fun <K, V: Any> Iterable<K>.keysToMapExceptNulls(value: (K) -> V?): Map<K, V> {
val map = LinkedHashMap<K, V>()
for (k in this) {
val v = value(k)
if (v != null) {
map[k] = v
}
}
return map
}