将数组中的所有元素转换为由 separator
分隔的字符串
https://github.com/ddzy/ts-utility-plugins/tree/master/src/ddzy/utility/array/_join
_join.test.tsimport { _join } from "../../utility/array/_join";describe('Method _join test:', () => {test('_join() should return the empty string when receive an empty array', () => {const received = {arr: [],separator: '',};const expected = '';const result = _join(received.arr, received.separator);expect(result).toBe(expected);});test('_join() should return the composed string when receive an array maked by number', () => {const received = {arr: [1, 2, 3, 4, 5],separator: '',};const expected = '12345';const result = _join(received.arr, received.separator);expect(result).toBe(expected);});test('_join() can config your own separator', () => {const received = {arr: ['a', 'b', 'c', 'd', 'e'],separator: '-',};const expected = 'a-b-c-d-e';const result = _join(received.arr, received.separator);expect(result).toBe(expected);});});