difference

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difference
说明
 创建一个具有唯一array值的数组，每个值不包含在其他给定的数组中
源码
​https://github.com/ddzy/ts-utility-plugins/tree/master/src/ddzy/utility/array/difference​
用法
difference.test.ts
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import { difference } from "../../utility/array/difference";
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​
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describe('difference tests', () => {
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  test('difference should receive an array being composed of number and return the processed array', () => {
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    const received = {
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      origin: [1, 2, 3, 4, 5],
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      filter: [1, 4],
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    };
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    const expected = [2, 3, 5];
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​
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    const result = difference<number>(received.origin, ...received.filter);
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​
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    for (const [i, v] of result.entries()) {
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      expect(v).toBe(expected[i]);
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    }
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  });
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​
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  test('difference should return a new array', () => {
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    const received = {
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      origin: [100, 200, 300, 300, 500],
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      filter: [300],
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    };
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    const expected = [100, 200, 500];
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​
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    const result = difference<number>(received.origin, ...received.filter);
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​
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    for (const [i, v] of result.entries()) {
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      expect(v).toBe(expected[i]);
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    }
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​
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    received.origin.push(800);
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​
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    for (const [i, v] of result.entries()) {
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      expect(v).toBe(expected[i]);
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    }
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  });
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​
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  test('difference should receive an array being composed of any value and return a new array', () => {
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    const received = {
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      origin: [null, undefined, NaN, '', 0, false, function () { }, {}, []],
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      filter: [function () { }, [], null],
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    };
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    const expected = [undefined, NaN, '', 0, false, function () { }, {}, []];
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​
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    const result = difference<any>(received.origin, ...received.filter);
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​
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    expect(result.length).toBe(expected.length);
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  });
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});
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