StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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51 lines
1.7 KiB
51 lines
1.7 KiB
4 years ago
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import objectAssign from 'object-assign';
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import _stripInsignificantZeros from './internal/stripInsignificantZeros';
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import settings from './settings';
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import toFixed from './toFixed';
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/**
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* Format a number, with comma-separated thousands and custom precision/decimal places
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* Alias: `accounting.format()`
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*
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* Localise by overriding the precision and thousand / decimal separators
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*
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* ```js
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* accounting.formatNumber(5318008); // 5,318,008
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* accounting.formatNumber(9876543.21, { precision: 3, thousand: " " }); // 9 876 543.210
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* ```
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*
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* @method formatNumber
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* @for accounting
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* @param {Number} number The number to be formatted.
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* @param {Object} [opts={}] Object containing all the options of the method.
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* @return {String} The given number properly formatted.
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*/
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function formatNumber(number, opts = {}) {
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// Resursively format arrays:
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if (Array.isArray(number)) {
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return number.map((val) => formatNumber(val, opts));
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}
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// Build options object from second param (if object) or all params, extending defaults:
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opts = objectAssign({},
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settings,
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opts
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);
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// Do some calc:
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const negative = number < 0 ? '-' : '';
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const base = parseInt(toFixed(Math.abs(number), opts.precision), 10) + '';
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const mod = base.length > 3 ? base.length % 3 : 0;
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// Format the number:
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const formatted = negative +
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(mod ? base.substr(0, mod) + opts.thousand : '') +
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base.substr(mod).replace(/(\d{3})(?=\d)/g, '$1' + opts.thousand) +
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(opts.precision > 0 ? opts.decimal + toFixed(Math.abs(number), opts.precision).split('.')[1] : '');
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return opts.stripZeros ? _stripInsignificantZeros(formatted, opts.decimal) : formatted;
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}
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export default formatNumber;
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