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66 lines
1.3 KiB
Markdown
66 lines
1.3 KiB
Markdown
---
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id: 69bc6cb30c1d112a2e110a04
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title: "Challenge 247: Last Letter"
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challengeType: 28
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dashedName: challenge-247
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---
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# --description--
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Given a string, return the letter from the string that appears last in the alphabet.
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- If two or more letters tie for the last in the alphabet, return the first one.
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- Ignore all non-letter characters.
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# --hints--
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`getLastLetter("world")` should return `"w"`.
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```js
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assert.equal(getLastLetter("world"), "w");
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```
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`getLastLetter("Hello World")` should return `"W"`.
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```js
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assert.equal(getLastLetter("Hello World"), "W");
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```
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`getLastLetter("The quick brown fox jumped over the lazy dog.")` should return `"z"`.
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```js
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assert.equal(getLastLetter("The quick brown fox jumped over the lazy dog."), "z");
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```
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`getLastLetter("HeLl0")` should return `"L"`.
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```js
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assert.equal(getLastLetter("HeLl0"), "L");
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```
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`getLastLetter("!#$ er@R asd fT.,> 2t0e9")` should return `"T"`.
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```js
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assert.equal(getLastLetter("!#$ er@R asd fT.,> 2t0e9"), "T");
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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 getLastLetter(str) {
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return str;
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}
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```
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# --solutions--
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```js
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function getLastLetter(str) {
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const letters = str.split('').filter(char => /[a-zA-Z]/.test(char));
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return letters.reduce((last, char) => char.toLowerCase() > last.toLowerCase() ? char : last);
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}
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```
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