Links

forIn

说明

使用 iteratee 遍历对象的自身和继承的可枚举属性. iteratee 会传入3个参数: (value, key, object). 如果返回 false, iteratee 会提前退出遍历.

源码

用法

forIn.test.ts
import { forIn } from "../../utility/object/forIn";
describe('forIn tests...', () => {
test('method forIn should not exit', () => {
interface IReceivedProps {
name: string,
age: number,
skill: string,
};
const received: IReceivedProps = {
name: 'duanzhaoyang',
age: 21,
skill: 'program',
};
const expected = received;
forIn(received, (value, key) => {
expect(value).toBe(expected[key as keyof typeof expected]);
});
});
test('method forIn should exit when return `false`', () => {
interface IReceivedProps {
city: string[];
position: {
x: number,
y: number,
};
continue: boolean;
nextOne: number;
nextTwo: number;
};
const received: IReceivedProps = {
city: ['Dongguan', 'Foshan', 'Guangzhou'],
position: {
x: 100,
y: 200,
},
continue: false,
nextOne: 1,
nextTwo: 2,
};
const expected = received;
let count = 0;
forIn<IReceivedProps>(received, function (value, key, origin) {
count++;
expect(value).toBe(expected[key as keyof typeof expected]);
expect(this).toBe(origin);
if (key === 'continue') {
return false;
}
});
expect(count).toBe(3);
});
});
最近更新 3yr ago