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javascript/snippets/palindrome.md

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+---
+title: Palindrome
+type: snippet
+tags: [string]
+cover: bridge-drop
+dateModified: 2020-10-22T20:24:04+03:00
+---
+
+Checks if the given string is a palindrome.
+
+- Normalize the string to `String.prototype.toLowerCase()` and use `String.prototype.replace()` to remove non-alphanumeric characters from it.
+- Use the spread operator (`...`) to split the normalized string into individual characters.
+- Use `Array.prototype.reverse()`, `Array.prototype.join()` and compare the result to the normalized string.
+
+```js
+const palindrome = str => {
+  const s = str.toLowerCase().replace(/[\W_]/g, '');
+  return s === [...s].reverse().join('');
+};
+```
+
+```js
+palindrome('taco cat'); // true
+```