add includesAny

This commit is contained in:
7assentlili
2019-11-03 22:49:17 +01:00
parent aa8b71b0cc
commit 714e64d2b8
2 changed files with 31 additions and 0 deletions

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snippets/includesAny.md Normal file
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---
title: includesAny
tags: array,beginner
---
Returns `true` if at least one element of values is included in arr , `false` otherwise.
Use `Array.prototype.some()` and `Array.prototype.includes()` to check if at least one element of `values` is included in `arr`.
```js
const includesAny = (arr, values) => values.some(v => arr.includes(v));
```
```js
includesAny([1, 2, 3, 4], [2, 9]); // true
includesAny([1, 2, 3, 4], [8, 9]); // false
```

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test/includesAny.test.js Normal file
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const {includesAny} = require('./_30s.js');
test('any is a Function', () => {
expect(includesAny).toBeInstanceOf(Function);
});
test('Returns true when values contains one element of arr', () => {
expect(includesAny([0, 1, 2, 3], [1, 10, 20])).toBe(true);
});
test('Returns false when values contains none of arr elements', () => {
expect(includesAny([0, 1, 2, 3], [10, 20, 30])).toBe(false);
});
test('Returns false when values is an empty array', () => {
expect(includesAny([0, 1, 2, 3], [])).toBe(false);
});