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javascript/snippets/digitize.md

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+---
+title: Digitize number
+type: snippet
+tags: [math]
+cover: industrial-tokyo
+dateModified: 2020-10-18T14:58:09+03:00
+---
+
+Converts a number to an array of digits, removing its sign if necessary.
+
+- Use `Math.abs()` to strip the number's sign.
+- Convert the number to a string, using the spread operator (`...`) to build an array.
+- Use `Array.prototype.map()` and `parseInt()` to transform each value to an integer.
+
+```js
+const digitize = n => [...`${Math.abs(n)}`].map(i => parseInt(i));
+```
+
+```js
+digitize(123); // [1, 2, 3]
+digitize(-123); // [1, 2, 3]
+```