added SimpleArrayMap<K, V>.toKeyList()

hereisderek · Sep 3, 2019 · 2d66b00 · 2d66b00
1 parent a104929
commit 2d66b00
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Showing 2 changed files with 12 additions and 3 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,5 @@
 language: android
 # os: linux
-# sudo: required
-# jdk: oraclejdk8
-# dist: trusty
 jdk: oraclejdk8
 sudo: false
 

diff --git a/base/src/main/java/com/github/hereisderek/androidutil/collection/Extensions.kt b/base/src/main/java/com/github/hereisderek/androidutil/collection/Extensions.kt
@@ -1,5 +1,6 @@
 package com.github.hereisderek.androidutil.collection
 
+import androidx.collection.SimpleArrayMap
 import java.lang.IndexOutOfBoundsException
 
 /**
@@ -40,4 +41,15 @@ fun FloatArray.set(vararg values: Float)  {
     values.forEachIndexed { index, fl ->
         this[index] = fl
     }
+}
+
+
+fun <K, V> SimpleArrayMap<K, V>.toKeyList() : List<K> {
+    val size = this.size()
+    if (size() == 0) return emptyList()
+    val list = ArrayList<K>(size())
+    for ( i in 0 until size) {
+        list.add(this.keyAt(i))
+    }
+    return list
 }