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feat(facade): add ListWrapper.flatten

This commit is contained in:
vsavkin 2016-03-23 13:42:19 -07:00 committed by Victor Savkin
parent 91999e016e
commit a1880c3576
2 changed files with 13 additions and 0 deletions
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8
modules/angular2/src/facade/collection.dart
View File

@ -232,6 +232,14 @@ class ListWrapper {
static bool isImmutable(List l) { static bool isImmutable(List l) {
return l is UnmodifiableListView; 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; bool isListLikeIterable(obj) => obj is Iterable;

5
modules/angular2/src/facade/collection.ts
View File

@ -278,6 +278,11 @@ export class ListWrapper {
} }
static isImmutable(list: any[]): boolean { return Object.isSealed(list); } 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 { export function isListLikeIterable(obj: any): boolean {