add sortedIndex

snippets/sortedIndex.md

@@ -0,0 +1,19 @@
+### isValidJSON
+
+Checks if the provided argument is an valid JSON.
+
+
+
+```js
+const sortedIndex = (arr,n) => {
+    arr[0] > arr[1] ? (anarray = arr.reverse(),isReversed = true) : (anarray = arr,isReversed = false);  
+	val = anarray.findIndex( el => {
+	return n <= el
+    })
+	return val === -1 ? arr.length : isReversed ? arr.length - val : val
+}
+```
+
+```js
+
+```