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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | 3x 3x 3x 2x | import { A } from '@ember/array'; /** * @public * @class utils */ /** * Given an array and an index, splits the array at index and pushes the first * chunk to the end of the second chunk. * * @private * @method arraySwap * @param {array} arr An array to split, shift and rejoin. * @param {number} index The index where the split should occur. * @return {array} The swapped/shifted array. */ export function arraySwap(arr, index) { const endOfArr = arr.slice(0, index); const beginOfArr = A(arr.slice(index)); return beginOfArr.pushObjects(endOfArr); } /** * Flattens an array of arrays into a shallow array. * * @private * @method flatten * @param {arrayOfArrays} arr An array to flatten. * @return {array} The flattened array. */ export function flatten(arrayOfArrays) { return A(arrayOfArrays).reduce((a, b) => A(a).concat(b)); } |