Kebab file names

snippets/all-equal.md

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+---
+title: Check if array elements are equal
+tags: array
+cover: shelf-plant
+firstSeen: 2018-08-03T00:03:08+03:00
+lastUpdated: 2020-10-18T20:24:28+03:00
+---
+
+Checks if all elements in an array are equal.
+
+- Use `Array.prototype.every()` to check if all the elements of the array are the same as the first one.
+- Elements in the array are compared using the strict comparison operator, which does not account for `NaN` self-inequality.
+
+```js
+const allEqual = arr => arr.every(val => val === arr[0]);
+```
+
+```js
+allEqual([1, 2, 3, 4, 5, 6]); // false
+allEqual([1, 1, 1, 1]); // true
+```