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