math-scale.js•607 B
'use strict';
// `Math.scale` method implementation
// https://rwaldron.github.io/proposal-math-extensions/
module.exports = function scale(x, inLow, inHigh, outLow, outHigh) {
var nx = +x;
var nInLow = +inLow;
var nInHigh = +inHigh;
var nOutLow = +outLow;
var nOutHigh = +outHigh;
// eslint-disable-next-line no-self-compare -- NaN check
if (nx !== nx || nInLow !== nInLow || nInHigh !== nInHigh || nOutLow !== nOutLow || nOutHigh !== nOutHigh) return NaN;
if (nx === Infinity || nx === -Infinity) return nx;
return (nx - nInLow) * (nOutHigh - nOutLow) / (nInHigh - nInLow) + nOutLow;
};