dropRightWhile
创建一个切片数组, 去除源数组中从特定的
callback返回假值开始到尾部的部分dropRightWhile.test.ts
import { dropRightWhile } from "../../utility/array/dropRightWhile";
describe('dropRightWhile tests...', () => {
test('dropRightWhile should return an empty array when receve an empty array', () => {
const received: number[] = [];
const expected = 0;
const result = dropRightWhile<number>(received, function (v) {
return !!v;
});
expect(result.length).toBe(expected);
});
test('dropRightWhile should return the filtered array when receive an array being composed of number', () => {
const received: number[] = [23, 34, -1, -5, 54, 22, 0];
const expected: number[] = [23, 34];
const result = dropRightWhile(received, function (v) {
return v < 0;
})
for (const [i, v] of result.entries()) {
expect(v).toBe(expected[i]);
}
});
test('dropRightWhile should return the filtered array when receive an array being composed of object', () => {
interface IReceivedParams {
name: string;
age: number;
};
const received: IReceivedParams[] = [
{ name: 'duan', age: 20 },
{ name: 'zhao', age: 30 },
{ name: 'yang', age: 40 },
];
const expected = [received[0]];
const result = dropRightWhile<IReceivedParams>(received, function (v) {
return v.age === 30;
});
for (const [i, v] of result.entries()) {
expect(v).toBe(expected[i]);
}
});
});
最近更新 2yr ago