handlebars-helpers/lib/helpers/helpers-numbers.js

Extensive collection of Handlebars helpers.

/*! number helpers*/


(function() {
  var Utils, addCommas, toAbbr, toExponential, toFixed, toFloat, toInt, toPrecision;

  Utils = require('../utils/utils');

  module.exports.toFixed = toFixed = function(number, digits) {
    if (Utils.isUndefined(digits)) {
      digits = 0;
    }
    return number.toFixed(digits);
  };

  module.exports.toPrecision = toPrecision = function(number, precision) {
    if (Utils.isUndefined(precision)) {
      precision = 1;
    }
    return number.toPrecision(precision);
  };

  module.exports.toExponential = toExponential = function(number, fractions) {
    if (Utils.isUndefined(fractions)) {
      fractions = 0;
    }
    return number.toExponential(fractions);
  };

  module.exports.toInt = toInt = function(number) {
    return parseInt(number, 10);
  };

  module.exports.toFloat = toFloat = function(number) {
    return parseFloat(number);
  };

  module.exports.toAbbr = toAbbr = function(number, digits) {
    var abbr, i, size;
    if (Utils.isUndefined(digits)) {
      digits = 2;
    }
    digits = Math.pow(10, digits);
    abbr = ["k", "m", "b", "t"];
    i = abbr.length - 1;
    while (i >= 0) {
      size = Math.pow(10, (i + 1) * 3);
      if (size <= number) {
        number = Math.round(number * digits / size) / digits;
        if ((number === 1000) && (i < abbr.length - 1)) {
          number = 1;
          i++;
        }
        number += abbr[i];
        break;
      }
      i--;
    }
    return number;
  };

  module.exports.addCommas = addCommas = function(number) {
    return number.toString().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
  };

  module.exports.register = function(Handlebars, options) {
    Handlebars.registerHelper("toFixed", toFixed);
    Handlebars.registerHelper("toPrecision", toPrecision);
    Handlebars.registerHelper("toExponential", toExponential);
    Handlebars.registerHelper("toInt", toInt);
    Handlebars.registerHelper("toFloat", toFloat);
    Handlebars.registerHelper("toAbbr", toAbbr);
    Handlebars.registerHelper("addCommas", addCommas);
    return this;
  };

}).call(this);