Created
July 10, 2015 08:30
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JS: convert number to money string
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| 'use strict'; | |
| /** | |
| * isNumeric(n) returns a bool value | |
| * is "n" number or not | |
| * | |
| * @param {Number} n | |
| * @return {Bool} result | |
| */ | |
| function isNumeric(n) { | |
| return !isNaN(parseFloat(n)) && isFinite(n); | |
| } | |
| /** | |
| * moneyFormat(num, count, sep, tab) returns money formatting string | |
| * @param {Number} num | |
| * @param {Number} count | |
| * @param {String} sep | |
| * @param {String} tab | |
| * | |
| * @return {String} result | |
| */ | |
| function moneyFormat(num, count, sep, tab) { | |
| if(!isNumeric(num)) { | |
| throw Error('Argument "num" is not a number'); | |
| } | |
| count = isNumeric(count = Math.abs(count)) ? count : 2; | |
| sep = sep === undefined ? '.' : sep; | |
| tab = tab === undefined ? ' ' : tab; | |
| var sign = num < 0 ? '-' : ''; | |
| var absVal = parseInt(num = Math.abs(+num || 0).toFixed(count)) + ''; | |
| var unCount = (unCount = absVal.length) > 3 ? unCount % 3 : 0; // count of ungrouped decimal by "tab" | |
| return sign + (unCount ? absVal.substr(0, unCount) + tab : '') | |
| + absVal.substr(unCount).replace(/(\d{3})(?=\d)/g, '$1' + tab) | |
| + (count ? sep + Math.abs(num - absVal).toFixed(count).slice(2) : ''); | |
| } | |
| /** | |
| * For tests | |
| */ | |
| var nums = [20000000000000000.12, 2000.00, .12, .123, -1234.556, '45.12', | |
| '45,12', 'asd', null, '', undefined, -Infinity, Infinity, NaN, false, true]; | |
| var v; | |
| for(v of nums) { | |
| try { | |
| console.log('moneyFormat: ' + moneyFormat(v)); | |
| } catch(e) { | |
| console.log(e); | |
| } | |
| } |
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