创建一个数组切片,从 arr
数组的起始元素开始提取 amount
个元素
https://github.com/ddzy/ts-utility-plugins/tree/master/src/ddzy/utility/array/take
take.test.tsimport take from "../../utility/array/take";describe('take', () => {test('Method `take()` should return the correct result', () => {const received = [{arr: [1, 2, 3, 4, 5, 6, 7, 8],amount: 5,},{arr: [],amount: 3,},{arr: ['a', 'b', 'c', 'd', 'e'],amount: 8,},{arr: [[], [], [], [1, 2, 3]],amount: 0,},];const expected = [[1, 2, 3, 4, 5],[],['a', 'b', 'c', 'd', 'e'],[],];received.forEach((outerV, outerI) => {const result = take<any>(outerV.arr, outerV.amount);if (result.length > 0) {result.forEach((innerV, innerI) => {expect(innerV).toBe(expected[outerI][innerI]);});} else {if (outerI % 2 !== 0) {expect(result.length).toBe(expected[outerI].length);}}});});});