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andreasvirkus/roundingThatScales.js

Created August 16, 2022 10:28
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  1. andreasvirkus created this gist Aug 16, 2022.
    11 changes: 11 additions & 0 deletions roundingThatScales.js
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    Original file line number Diff line number Diff line change
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    const roundingStops = [5, 10, 50, 100, 500, 1000, 5000, 10000, 50000, 100000]

    export const roundToScale = (count, scale = roundingStops) => {
    if (count === 0) return 0

    const nearestIdx = scale.findIndex((s) => s > count)
    let nearest = scale[nearestIdx]
    if (nearestIdx !== 0 && nearest / 2 > count) nearest = scale[nearestIdx - 1] || scale[0]

    return nearest || count
    }