20 lines
698 B
Markdown
20 lines
698 B
Markdown
---
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title: palindrome
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tags: string,intermediate
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---
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Returns `true` if the given string is a palindrome, `false` otherwise.
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- Convert the string to `String.prototype.toLowerCase()` and use `String.prototype.replace()` to remove non-alphanumeric characters from it.
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- Then, use the spread operator (`...`) to split the string into individual characters, `Array.prototype.reverse()`, `String.prototype.join('')` and compare it to the original, unreversed string, after converting it to `String.prototype.toLowerCase()`.
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```js
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const palindrome = str => {
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const s = str.toLowerCase().replace(/[\W_]/g, '');
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return s === [...s].reverse().join('');
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};
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```
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```js
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palindrome('taco cat'); // true
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``` |