add isArrayLike and isValidJSON

snippets/isArrayLike.md

@@ -0,0 +1,21 @@
+### isArrayLike
+
+Checks if the provided argument is `arrayLike` i.e. is iterable.
+
+```js
+const arr = (arr) => {
+  try{
+    Array.from(arr);
+    return true;
+  }
+  catch(e){
+    return false;
+  }
+}
+```
+
+```js
+isArrayLike(document.querySelector('.className')) // true
+isArrayLike('abc') // true
+isArrayLike(null) // false
+```