drop

源码
​https://github.com/ddzy/ts-utility-plugins/tree/master/src/ddzy/utility/array/drop​
说明
创建一个切片数组, 去除array前面的n个元素. (n默认值为1)
用法
drop.ts
drop.test.ts
drop.ts
import { drop } from "./ddzy/utility/array/drop";
​
// ? 空数组 + 默认值
const s1: number[] = [];
const p1 = drop(s1);
console.log(p1);
​
console.log('-----------------');
​
// ? 纯数字数组 + 自定义数值
const s2: number[] = [1, 2, 3, 4, 5, 6];
const p2 = drop<number>(s2, 3);
console.log(p2);
​
console.log('--------------------');
​
// ? 不应该改变源数组
const s3: number[] = [100, 300, 500];
const p3 = drop<number>(s3, 0);
console.log(p3);
p3.push(700);
console.log(s3);
console.log(p3);
drop.test.ts
import { drop } from "../../utility/array/drop";
​
describe('drop tests', () => {
  test('drop should return an empty array when receive an empty array', () => {
    const received: number[] = [];
    const expected = [];
​
    const result = drop<number>(received);
​
    expect(result.length).toBe(expected.length);
  });
​
  test('drop should return the droped array by using customized number when receive an array being composed of number', () => {
    const received: number[] = [1, 2, 3, 4, 5, 6];
    const expected: number[] = [4, 5, 6];
​
    const result = drop<number>(received, 3);
​
    result.forEach((v, i) => {
      expect(v).toBe(expected[i]);
    });
  });
​
  test('drop should not change the origin array', () => {
    const received: number[] = [100, 300, 500];
    const expected: number[] = [100, 300, 500];
​
    const result = drop<number>(received, 0);
    result.push(700, 900);
​
    expect(result.length).toBe(5);
    received.forEach((v, i) => {
      expect(v).toBe(expected[i]);
    });
  });
});
difference
head
Last updated 11 months ago