Kebab file names

snippets/reverse-number.md

@@ -0,0 +1,25 @@
+---
+title: Reverse number
+tags: math,string
+cover: walking
+firstSeen: 2020-07-17T16:41:28+03:00
+lastUpdated: 2020-09-18T21:19:23+03:00
+---
+
+Reverses a number.
+
+- Use `Object.prototype.toString()` to convert `n` to a string.
+- Use `String.prototype.split()`, `Array.prototype.reverse()` and `Array.prototype.join()` to get the reversed value of `n` as a string.
+- Use `parseFloat()` to convert the string to a number and `Math.sign()` to preserve its sign.
+
+```js
+const reverseNumber = n =>
+  parseFloat(`${n}`.split('').reverse().join('')) * Math.sign(n);
+```
+
+```js
+reverseNumber(981); // 189
+reverseNumber(-500); // -5
+reverseNumber(73.6); // 6.37
+reverseNumber(-5.23); // -32.5
+```