118 lines
2.3 KiB
Markdown
118 lines
2.3 KiB
Markdown
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---
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id: af2170cad53daa0770fabdea
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title: Mutations
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challengeType: 5
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forumTopicId: 16025
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dashedName: mutations
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---
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# --description--
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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.
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For example, `["hello", "Hello"]`, should return true because all of the letters in the second string are present in the first, ignoring case.
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The arguments `["hello", "hey"]` should return false because the string "hello" does not contain a "y".
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Lastly, `["Alien", "line"]`, should return true because all of the letters in "line" are present in "Alien".
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# --hints--
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`mutation(["hello", "hey"])` should return false.
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```js
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assert(mutation(['hello', 'hey']) === false);
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```
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`mutation(["hello", "Hello"])` should return true.
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```js
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assert(mutation(['hello', 'Hello']) === true);
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```
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`mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"])` should return true.
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```js
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assert(mutation(['zyxwvutsrqponmlkjihgfedcba', 'qrstu']) === true);
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```
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`mutation(["Mary", "Army"])` should return true.
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```js
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assert(mutation(['Mary', 'Army']) === true);
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```
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`mutation(["Mary", "Aarmy"])` should return true.
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```js
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assert(mutation(['Mary', 'Aarmy']) === true);
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```
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`mutation(["Alien", "line"])` should return true.
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```js
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assert(mutation(['Alien', 'line']) === true);
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```
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`mutation(["floor", "for"])` should return true.
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```js
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assert(mutation(['floor', 'for']) === true);
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```
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`mutation(["hello", "neo"])` should return false.
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```js
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assert(mutation(['hello', 'neo']) === false);
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```
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`mutation(["voodoo", "no"])` should return false.
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```js
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assert(mutation(['voodoo', 'no']) === false);
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```
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`mutation(["ate", "date"]` should return false.
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```js
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assert(mutation(['ate', 'date']) === false);
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```
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`mutation(["Tiger", "Zebra"])` should return false.
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```js
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assert(mutation(['Tiger', 'Zebra']) === false);
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```
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`mutation(["Noel", "Ole"])` should return true.
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```js
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assert(mutation(['Noel', 'Ole']) === true);
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```
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# --seed--
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## --seed-contents--
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```js
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function mutation(arr) {
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return arr;
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}
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mutation(["hello", "hey"]);
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```
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# --solutions--
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```js
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function mutation(arr) {
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let hash = Object.create(null);
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arr[0].toLowerCase().split('').forEach(c => hash[c] = true);
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return !arr[1].toLowerCase().split('').filter(c => !hash[c]).length;
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}
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mutation(["hello", "hey"]);
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```
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