add includesAll

snippets/includesAll.md

@@ -0,0 +1,17 @@
+---
+title: includesAll
+tags: array,beginner
+---
+
+Returns `true` if all the elements of values are included in arr , `false` otherwise.
+
+Use `Array.prototype.every()` and `Array.prototype.includes()` to check if all elements of `values` are included in `arr`.
+
+```js
+const includesAll = (arr, values) => values.every(v => arr.includes(v));
+```
+
+```js
+includesAll([1, 2, 3, 4], [1, 4]); // true
+includesAll([1, 2, 3, 4], [1, 5]); // false
+```