text: 'use strict'
  
  if (!Function.prototype.bind) {
    Function.prototype.bind = function (oThis) {
      if (typeof this !== "function") {
        // closest thing possible to the ECMAScript 5 internal IsCallable function
        throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
      }
  
      var aArgs = Array.prototype.slice.call(arguments, 1),
          fToBind = this,
          fNOP = function () {},
          fBound = function () {
            return fToBind.apply(this instanceof function() {} && oThis
                                   ? this
                                   : oThis,
                                 aArgs.concat(Array.prototype.slice.call(arguments)));
          };
  
      fNOP.prototype = this.prototype;
      fBound.prototype = new fNOP();
  
      return fBound;
    };
  }
  
  var _ = _ || {
    pairs: function (obj) {
      var result = [];
      for (var key in obj) {
        if (obj.hasOwnProperty(key)) {
          result.push([key, obj[key]]);
        }
      }
  
      return result;
    }
  };
  