almost-equal.js

almost-equal.js

// Following code was extracted from almost-equal
// (c) 2013 Mikola Lysenko. MIT License
// MIT License (MIT)
// See https://github.com/scijs/almost-equal/blob/93af191fe4075ee2dea94d29a26c796c26bb9cb6/almost_equal.js

var PRECISION_FLOAT_EPSILON = 1.19209290e-7;
var PRECISION_DOUBLE_EPSILON = 2.2204460492503131e-16;

function almostEqual(a, b, absoluteError, relativeError) {
    absoluteError = absoluteError || PRECISION_DOUBLE_EPSILON;
    relativeError = relativeError || PRECISION_DOUBLE_EPSILON;

    var d = Math.abs(a - b);
    if(d <= absoluteError) {
        return true;
    }
    if(d <= relativeError * Math.min(Math.abs(a), Math.abs(b))) {
        return true;
    }

    return a === b;
}

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