feat(facade): add ListWrapper.flatten

vsavkin · vsavkin · commit a1880c357639 · 2016-03-24T20:36:19.000Z
diff --git a/modules/angular2/src/facade/collection.dart b/modules/angular2/src/facade/collection.dart
@@ -232,6 +232,14 @@ class ListWrapper {
   static bool isImmutable(List l) {
     return l is UnmodifiableListView;
   }
+
+  static List flatten(List l) {
+    final res = [];
+    l.forEach((item) {
+      res.addAll(item);
+    });
+    return res;
+  }
 }
 
 bool isListLikeIterable(obj) => obj is Iterable;
diff --git a/modules/angular2/src/facade/collection.ts b/modules/angular2/src/facade/collection.ts
@@ -278,6 +278,11 @@ export class ListWrapper {
   }
 
   static isImmutable(list: any[]): boolean { return Object.isSealed(list); }
+  static flatten<T>(array: T[][]): T[] {
+    let res = [];
+    array.forEach((a) => res = res.concat(a));
+    return res;
+  }
 }
 
 export function isListLikeIterable(obj: any): boolean {

Original file line number	Diff line number	Diff line change
`@@ -232,6 +232,14 @@ class ListWrapper {`
`232`	`232`	`static bool isImmutable(List l) {`
`233`	`233`	`return l is UnmodifiableListView;`
`234`	`234`	`}`
	`235`	`+`
	`236`	`+ static List flatten(List l) {`
	`237`	`+ final res = [];`
	`238`	`+ l.forEach((item) {`
	`239`	`+ res.addAll(item);`
	`240`	`+ });`
	`241`	`+ return res;`
	`242`	`+ }`
`235`	`243`	`}`
`236`	`244`
`237`	`245`	`bool isListLikeIterable(obj) => obj is Iterable;`
Original file line number	Diff line number	Diff line change
`@@ -278,6 +278,11 @@ export class ListWrapper {`
`278`	`278`	`}`
`279`	`279`
`280`	`280`	`static isImmutable(list: any[]): boolean { return Object.isSealed(list); }`
	`281`	`+ static flatten<T>(array: T[][]): T[] {`
	`282`	`+ let res = [];`
	`283`	`+ array.forEach((a) => res = res.concat(a));`
	`284`	`+ return res;`
	`285`	`+ }`
`281`	`286`	`}`
`282`	`287`
`283`	`288`	`export function isListLikeIterable(obj: any): boolean {`