polyfills.js

;(function () {

  "use strict";

  if(typeof String.prototype.trim !== 'function') {
    String.prototype.trim = function() {
      return this.replace(/^\s+|\s+$/g, ''); 
    }
  }

// extend underscore
_.mixin({
  capitalize: function(string) {
    return string.charAt(0).toUpperCase() + string.substring(1).toLowerCase();
  },

  toTitleCase: function (str) {
    var regex = /\w\S*/g;
    return str.replace(regex, function(w) {
      return w.charAt(0).toUpperCase() + w.substr(1).toLowerCase();
    });
  },

  assert: function (exp, err) {
    if (!exp) {
      throw new Meteor.Error(err ? err : "oops, assert failed");
    }
  },

  dynamicSort: function (property) {
    var sortOrder = 1;
    if(property[0] === "-") {
      sortOrder = -1;
      property = property.substr(1);
    }
    return function (a,b) {
      var result = (a[property] < b[property]) ? 
        -1 : (a[property] > b[property]) ? 1 : 0;
      return result * sortOrder;
    }
  },
});

}());