Closest numeric match
JavaScript, Math · Mar 30, 2022

Finds the closest number from an array.
- Use
Array.prototype.reduce()
to scan all elements of the array. - Use
Math.abs()
to compare each element's distance from the target value, storing the closest match.
const closest = (arr, n) =>
arr.reduce((acc, num) => (Math.abs(num - n) < Math.abs(acc - n) ? num : acc));
closest([6, 1, 3, 7, 9], 5); // 6
Written by Angelos Chalaris
I'm Angelos Chalaris, a JavaScript software engineer, based in Athens, Greece. The best snippets from my coding adventures are published here to help others learn to code.
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