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12 lines
351 B
12 lines
351 B
2 years ago
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exports = function(num) {
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num = num.toExponential().match(regExponential);
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var coefficient = num[1];
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var exponent = parseInt(num[2], 10);
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var places = (coefficient.split('.')[1] || '').length;
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var ret = places - exponent;
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return ret < 0 ? 0 : ret;
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};
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var regExponential = /^(-?\d?\.?\d+)e([+-]\d)+/;
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module.exports = exports;
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