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islahh/fixed-decimal-point.js

Last active May 6, 2021 08:52
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fixed-decimal-point.js
Truncate a number to a fixed decimal point
Using the Math.pow() method, we can truncate a number to a certain decimal point that we provide in the function.
Ex.
const toFixed = (n, fixed) => ~~(Math.pow(10, fixed) * n) / Math.pow(10, fixed);
// Examples
toFixed(25.198726354, 1); // 25.1
toFixed(25.198726354, 2); // 25.19
toFixed(25.198726354, 3); // 25.198
toFixed(25.198726354, 4); // 25.1987
toFixed(25.198726354, 5); // 25.19872
toFixed(25.198726354, 6); // 25.198726
Reference and further reading
https://medium.com/dailyjs/13-javascript-one-liners-thatll-make-you-look-like-a-pro-29a27b6f51cb
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