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array_utils.ts
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/
array_utils.ts
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
/**
* Equivalent to ES6 spread, add each item to an array.
*
* @param items The items to add
* @param arr The array to which you want to add the items
*/
export function addAllToArray(items: any[], arr: any[]) {
for (let i = 0; i < items.length; i++) {
arr.push(items[i]);
}
}
/**
* Flattens an array in non-recursive way. Input arrays are not modified.
*/
export function flatten(list: any[]): any[] {
const result: any[] = [];
let i = 0;
while (i < list.length) {
const item = list[i];
if (Array.isArray(item)) {
if (item.length > 0) {
list = item.concat(list.slice(i + 1));
i = 0;
} else {
i++;
}
} else {
result.push(item);
i++;
}
}
return result;
}