Merge branch 'master' of https://github.com/kriadmin/30-seconds-of-code

snippets/join.md

@@ -1,13 +1,21 @@
 ### join
 
-Is like `Array.join()` but with an additional argument of `end`(is equal to `separator` by default) which is used to separate the second to last and last items in the array. Returns `""` when the array is empty and the first item when the length of array is 1.
+Joins all elements of an array into a string and returns this string. Uses a separator and an end separator.
+
+Use `Array.reduce()` to combine elements into a string.
+Omit the second argument, `separator`, to use a default separator of `','`.
+Omit the third argument, `end`, to use the same value as `separator` by default.
 
 ```js
-const join = (arr,separator = ',',end = separator ) => {
-      return arr.reduce((acc,val,i) => {
-       return  i == arr.length - 2 ? acc + val + end : i == arr.length - 1 ? acc + val : acc + val + separator
-     },'')
- }
+const join = (arr, separator = ',', end = separator) =>
+  arr.reduce(
+    (acc, val, i) =>
+      i == arr.length - 2
+        ? acc + val + end
+        : i == arr.length - 1 ? acc + val : acc + val + separator,
+    ''
+  );
+
 ```
 
 ```js

snippets/sortedIndex.md

@@ -14,6 +14,6 @@ const sortedIndex = (arr, n) => {
 ```
 
 ```js
-sortedIndex([5,3,2,1], 4); //1
+sortedIndex([5,3,2,1], 4); // 1
 sortedIndex([30,50],40); // 1
 ```