ran standard

Author: rubiin

String/CreatePurmutations.js

@@ -1,37 +1,31 @@
-function permutations(str){
-
+const createPermutations = (str) => {
 // convert string to array
-let arr = str.split(''),
+ const arr = str.split('')
+
+ // get array length
+ const strLen = arr.length
+ // this will hold all the permutations
+ const perms = []
+ let rest
+ let picked
+ let restPerms
+ let next
 
-// get array length 
- len = arr.length, 
-// this will hold all the permutations
- perms = [],
- rest,
- picked,
- restPerms,
- next;
- 
-// if len is zero, return the same string
- if (len === 0)
- return [str];
-// loop to the length to get all permutations
- for (let i=0; i<len; i++)
- {
- rest = Object.create(arr);
- picked = rest.splice(i, 1);
+ // if strLen is zero, return the same string
+ if (strLen === 0) { return [str] }
+ // loop to the length to get all permutations
+ for (let i = 0; i < strLen; i++) {
+ rest = Object.create(arr)
+ picked = rest.splice(i, 1)
 
-  restPerms = permutations(rest.join(''));
+ restPerms = createPermutations(rest.join(''))
 
- for (var j=0, jLen = restPerms.length; j< jLen; j++)
- {
- next = picked.concat(restPerms[j]);
- perms.push(next.join(''));
- }
+ for (let j = 0, jLen = restPerms.length; j < jLen; j++) {
+ next = picked.concat(restPerms[j])
+ perms.push(next.join(''))
  }
- return perms;
+ }
+ return perms
 }
 
-console.log(permutations('abc')) // should print ["abc", "acb", "bac", "bca", "cab", "cba"]
-
- 
+console.log(createPermutations('abc')) // should print ["abc", "acb", "bac", "bca", "cab", "cba"]