@@ -486,3 +486,33 @@ function getIndexToIns(arr, num) {
486486
487487getIndexToIns ([10 , 20 , 30 , 40 , 50 ], 35 );
488488```
489+ 490+ ### 15. Mutations
491+ 492+ _ Difficulty: Beginner_
493+ 494+ Return ` true ` if the string in the first element of the array contains all of the letters of the string in the second element of the array.
495+ 496+ For example, [ "hello", "Hello"] , should return ` true ` because all of the letters in the second string are present in the first, ignoring case.
497+ 498+ The arguments ` ["hello", "hey"] ` should return ` false ` because the string ` hello ` does not contain a ` y ` .
499+ 500+ Lastly, ` ["Alien", "line"] ` , should return ` true ` because all of the letters in ` line ` are present in ` Alien ` .
501+ 502+ ---
503+ 504+ #### Solution
505+ 506+ ``` js
507+ function mutation (arr ) {
508+ const arr1 = arr[0 ].toLowerCase ().split (" "
509+ const arr2 = arr[1 ].toLowerCase ().split (" "
510+ for (let i = 0 ; i < arr2 .length ; i++ ) {
511+ if (arr1 .indexOf (arr2[i]) == - 1 ) {
512+ return false ;
513+ }
514+ }
515+ return true ;
516+ }
517+ mutation ([" hello" " hey"
518+ ```
0 commit comments