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snippets/js/s/pull.md

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+---
+title: Pull values from array
+type: snippet
+language: javascript
+tags: [array]
+cover: last-light
+dateModified: 2020-10-22T20:24:04+03:00
+---
+
+Mutates the original array to filter out the values specified.
+
+- Use `Array.prototype.filter()` and `Array.prototype.includes()` to pull out the values that are not needed.
+- Set `Array.prototype.length` to mutate the passed in an array by resetting its length to `0`.
+- Use `Array.prototype.push()` to re-populate it with only the pulled values.
+
+```js
+const pull = (arr, ...args) => {
+  let argState = Array.isArray(args[0]) ? args[0] : args;
+  let pulled = arr.filter(v => !argState.includes(v));
+  arr.length = 0;
+  pulled.forEach(v => arr.push(v));
+};
+```
+
+```js
+let myArray = ['a', 'b', 'c', 'a', 'b', 'c'];
+pull(myArray, 'a', 'c'); // myArray = [ 'b', 'b' ]
+```