pouchdb-find/test/bind-polyfill.js

Easy-to-use query language for PouchDB

(function () {
  'use strict';

  // minimal polyfill for phantomjs; in the future, we
  // should do ES5_SHIM=true like pouchdb
  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 FNOP && oThis ? this : oThis,
              aArgs.concat(Array.prototype.slice.call(arguments)));
          };

      FNOP.prototype = this.prototype;
      fBound.prototype = new FNOP();

      return fBound;
    };
  }

  //minimal polyfill for phantomjs
  if (!Array.prototype.find) {
    Array.prototype.find = function(predicate) {
      if (this === null) {
        throw new TypeError('Array.prototype.find called on null or undefined');
      }
      if (typeof predicate !== 'function') {
        throw new TypeError('predicate must be a function');
      }
      var list = Object(this);
      var length = list.length >>> 0;
      var thisArg = arguments[1];
      var value;

      for (var i = 0; i < length; i++) {
        value = list[i];
        if (predicate.call(thisArg, value, i, list)) {
          return value;
        }
      }
      return undefined;
    };
  }
})();