DEV Community

loading...
Cover image for Find the index of the maximum item of an array

Find the index of the maximum item of an array

syedsimanta03
UI designer | Front end developer | Graphic designer #OpenToWork » Tools: GIT, VS Code, Adobe XD, Figma, Photoshop, Illustrator
・1 min read

Find the index of the maximum item of an array

const indexOfMax = arr => arr.reduce((prev, curr, i, a) => curr > a[prev] ? i : prev, 0);

// Examples
indexOfMax([1, 3, 9, 7, 5]); // 2
indexOfMax([1, 3, 7, 7, 5]); // 2

Discussion (0)