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Update and rename pull.md to array-pull-(mutates-array).md

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Angelos Chalaris
2017-12-17 11:46:41 +02:00
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parent 80a4a65840
commit dea5272fa2
1 changed files with 4 additions and 10 deletions
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snippets/pull.md → snippets/array-pull-(mutates-array).md
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@ -1,4 +1,4 @@
### Pull ### Array pull (mutates array)
Use `Array.filter()` to pull out the values that are not needed. Use `Array.filter()` to pull out the values that are not needed.
Use `Array.length = 0` to mutate the passed in array by resetting it's length to zero. Use `Array.length = 0` to mutate the passed in array by resetting it's length to zero.
@ -6,16 +6,10 @@ Use `Array.push()` to re-populate the original array to equal the pulled values
```js ```js
const pull = (arr, ...args) => { const pull = (arr, ...args) => {
let pulled = arr.filter((v, i) => args.indexOf(v) === -1); let pulled = arr.filter((v, i) => args.includes(v));
arr.length = 0; arr.length = 0; pulled.forEach(v => arr.push(v));
pulled.forEach(v => arr.push(v)); };
}
// let myArray = ['a', 'b', 'c', 'a', 'b', 'c']; // let myArray = ['a', 'b', 'c', 'a', 'b', 'c'];
// pull(myArray, 'a', 'c'); // pull(myArray, 'a', 'c');
// console.log(myArray) -> [ 'b', 'b' ] // console.log(myArray) -> [ 'b', 'b' ]
// let test = ['4', '1', '1', '5', '4', '2'];
// pull(test, '4', '1');
// console.log(myArray) -> [ '5', '2' ]
``` ```