Fully renamed and updated everything, tagged, built

snippets/isArray.md

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+### isArray
+
+Checks if the given argument is an array.
+
+Use `Array.isArray()` to check if a value is classified as an array.
+
+```js
+const isArray = val => !!val && Array.isArray(val);
+// isArray(null) -> false
+// isArray([1]) -> true
+```