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// numeral.js format configuration
// format : exponential
// author : Adam Draper : https://github.com/adamwdraper

(function (global, factory) {
    if (typeof define === 'function' && define.amd) {
        define(['../numeral'], factory);
    } else if (typeof module === 'object' && module.exports) {
        factory(require('../numeral'));
    } else {
        factory(global.numeral);
    }
}(this, function (numeral) {
    numeral.register('format', 'exponential', {
        regexps: {
            format: /(e\+|e-)/,
            unformat: /(e\+|e-)/
        },
        format: function(value, format, roundingFunction) {
            var output,
                exponential = typeof value === 'number' && !numeral._.isNaN(value) ? value.toExponential() : '0e+0',
                parts = exponential.split('e');

            format = format.replace(/e[\+|\-]{1}0/, '');

            output = numeral._.numberToFormat(Number(parts[0]), format, roundingFunction);

            return output + 'e' + parts[1];
        },
        unformat: function(string) {
            var parts = numeral._.includes(string, 'e+') ? string.split('e+') : string.split('e-'),
                value = Number(parts[0]),
                power = Number(parts[1]);

            power = numeral._.includes(string, 'e-') ? power *= -1 : power;

            function cback(accum, curr, currI, O) {
                var corrFactor = numeral._.correctionFactor(accum, curr),
                    num = (accum * corrFactor) * (curr * corrFactor) / (corrFactor * corrFactor);
                return num;
            }

            return numeral._.reduce([value, Math.pow(10, power)], cback, 1);
        }
    });
}));

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