text: $(document).ready(function() {
  
    module("Arrays");
  
    test("first", function() {
      equal(_.first([1,2,3]), 1, 'can pull out the first element of an array');
      equal(_([1, 2, 3]).first(), 1, 'can perform OO-style "first()"');
      equal(_.first([1,2,3], 0).join(', '), "", 'can pass an index to first');
      equal(_.first([1,2,3], 2).join(', '), '1, 2', 'can pass an index to first');
      equal(_.first([1,2,3], 5).join(', '), '1, 2, 3', 'can pass an index to first');
      var result = (function(){ return _.first(arguments); })(4, 3, 2, 1);
      equal(result, 4, 'works on an arguments object.');
      result = _.map([[1,2,3],[1,2,3]], _.first);
      equal(result.join(','), '1,1', 'works well with _.map');
      result = (function() { return _.take([1,2,3], 2); })();
      equal(result.join(','), '1,2', 'aliased as take');
  
      equal(_.first(null), undefined, 'handles nulls');
    });
  
    test("rest", function() {
      var numbers = [1, 2, 3, 4];
      equal(_.rest(numbers).join(", "), "2, 3, 4", 'working rest()');
      equal(_.rest(numbers, 0).join(", "), "1, 2, 3, 4", 'working rest(0)');
      equal(_.rest(numbers, 2).join(', '), '3, 4', 'rest can take an index');
      var result = (function(){ return _(arguments).tail(); })(1, 2, 3, 4);
      equal(result.join(', '), '2, 3, 4', 'aliased as tail and works on arguments object');
      result = _.map([[1,2,3],[1,2,3]], _.rest);
      equal(_.flatten(result).join(','), '2,3,2,3', 'works well with _.map');
      result = (function(){ return _(arguments).drop(); })(1, 2, 3, 4);
      equal(result.join(', '), '2, 3, 4', 'aliased as drop and works on arguments object');
    });
  
    test("initial", function() {
      equal(_.initial([1,2,3,4,5]).join(", "), "1, 2, 3, 4", 'working initial()');
      equal(_.initial([1,2,3,4],2).join(", "), "1, 2", 'initial can take an index');
      var result = (function(){ return _(arguments).initial(); })(1, 2, 3, 4);
      equal(result.join(", "), "1, 2, 3", 'initial works on arguments object');
      result = _.map([[1,2,3],[1,2,3]], _.initial);
      equal(_.flatten(result).join(','), '1,2,1,2', 'initial works with _.map');
    });
  
    test("last", function() {
      equal(_.last([1,2,3]), 3, 'can pull out the last element of an array');
      equal(_.last([1,2,3], 0).join(', '), "", 'can pass an index to last');
      equal(_.last([1,2,3], 2).join(', '), '2, 3', 'can pass an index to last');
      equal(_.last([1,2,3], 5).join(', '), '1, 2, 3', 'can pass an index to last');
      var result = (function(){ return _(arguments).last(); })(1, 2, 3, 4);
      equal(result, 4, 'works on an arguments object');
      result = _.map([[1,2,3],[1,2,3]], _.last);
      equal(result.join(','), '3,3', 'works well with _.map');
  
      equal(_.last(null), undefined, 'handles nulls');
    });
  
    test("compact", function() {
      equal(_.compact([0, 1, false, 2, false, 3]).length, 3, 'can trim out all falsy values');
      var result = (function(){ return _(arguments).compact().length; })(0, 1, false, 2, false, 3);
      equal(result, 3, 'works on an arguments object');
    });
  
    test("flatten", function() {
      if (window.JSON) {
        var list = [1, [2], [3, [[[4]]]]];
        equal(JSON.stringify(_.flatten(list)), '[1,2,3,4]', 'can flatten nested arrays');
        equal(JSON.stringify(_.flatten(list, true)), '[1,2,3,[[[4]]]]', 'can shallowly flatten nested arrays');
        var result = (function(){ return _.flatten(arguments); })(1, [2], [3, [[[4]]]]);
        equal(JSON.stringify(result), '[1,2,3,4]', 'works on an arguments object');
      }
    });
  
    test("without", function() {
      var list = [1, 2, 1, 0, 3, 1, 4];
      equal(_.without(list, 0, 1).join(', '), '2, 3, 4', 'can remove all instances of an object');
      var result = (function(){ return _.without(arguments, 0, 1); })(1, 2, 1, 0, 3, 1, 4);
      equal(result.join(', '), '2, 3, 4', 'works on an arguments object');
  
      var list = [{one : 1}, {two : 2}];
      ok(_.without(list, {one : 1}).length == 2, 'uses real object identity for comparisons.');
      ok(_.without(list, list[0]).length == 1, 'ditto.');
    });
  
    test("uniq", function() {
      var list = [1, 2, 1, 3, 1, 4];
      equal(_.uniq(list).join(', '), '1, 2, 3, 4', 'can find the unique values of an unsorted array');
  
      var list = [1, 1, 1, 2, 2, 3];
      equal(_.uniq(list, true).join(', '), '1, 2, 3', 'can find the unique values of a sorted array faster');
  
      var list = [{name:'moe'}, {name:'curly'}, {name:'larry'}, {name:'curly'}];
      var iterator = function(value) { return value.name; };
      equal(_.map(_.uniq(list, false, iterator), iterator).join(', '), 'moe, curly, larry', 'can find the unique values of an array using a custom iterator');
  
      equal(_.map(_.uniq(list, iterator), iterator).join(', '), 'moe, curly, larry', 'can find the unique values of an array using a custom iterator without specifying whether array is sorted');
  
      var iterator = function(value) { return value +1; };
      var list = [1, 2, 2, 3, 4, 4];
      equal(_.uniq(list, true, iterator).join(', '), '1, 2, 3, 4', 'iterator works with sorted array');
  
      var result = (function(){ return _.uniq(arguments); })(1, 2, 1, 3, 1, 4);
      equal(result.join(', '), '1, 2, 3, 4', 'works on an arguments object');
    });
  
    test("intersection", function() {
      var stooges = ['moe', 'curly', 'larry'], leaders = ['moe', 'groucho'];
      equal(_.intersection(stooges, leaders).join(''), 'moe', 'can take the set intersection of two arrays');
      equal(_(stooges).intersection(leaders).join(''), 'moe', 'can perform an OO-style intersection');
      var result = (function(){ return _.intersection(arguments, leaders); })('moe', 'curly', 'larry');
      equal(result.join(''), 'moe', 'works on an arguments object');
    });
  
    test("union", function() {
      var result = _.union([1, 2, 3], [2, 30, 1], [1, 40]);
      equal(result.join(' '), '1 2 3 30 40', 'takes the union of a list of arrays');
  
      var result = _.union([1, 2, 3], [2, 30, 1], [1, 40, [1]]);
      equal(result.join(' '), '1 2 3 30 40 1', 'takes the union of a list of nested arrays');
    });
  
    test("difference", function() {
      var result = _.difference([1, 2, 3], [2, 30, 40]);
      equal(result.join(' '), '1 3', 'takes the difference of two arrays');
  
      var result = _.difference([1, 2, 3, 4], [2, 30, 40], [1, 11, 111]);
      equal(result.join(' '), '3 4', 'takes the difference of three arrays');
    });
  
    test('zip', function() {
      var names = ['moe', 'larry', 'curly'], ages = [30, 40, 50], leaders = [true];
      var stooges = _.zip(names, ages, leaders);
      equal(String(stooges), 'moe,30,true,larry,40,,curly,50,', 'zipped together arrays of different lengths');
    });
  
    test('object', function() {
      var result = _.object(['moe', 'larry', 'curly'], [30, 40, 50]);
      var shouldBe = {moe: 30, larry: 40, curly: 50};
      ok(_.isEqual(result, shouldBe), 'two arrays zipped together into an object');
  
      result = _.object([['one', 1], ['two', 2], ['three', 3]]);
      shouldBe = {one: 1, two: 2, three: 3};
      ok(_.isEqual(result, shouldBe), 'an array of pairs zipped together into an object');
  
      var stooges = {moe: 30, larry: 40, curly: 50};
      ok(_.isEqual(_.object(_.pairs(stooges)), stooges), 'an object converted to pairs and back to an object');
  
      ok(_.isEqual(_.object(null), {}), 'handles nulls');
    });
  
    test("indexOf", function() {
      var numbers = [1, 2, 3];
      numbers.indexOf = null;
      equal(_.indexOf(numbers, 2), 1, 'can compute indexOf, even without the native function');
      var result = (function(){ return _.indexOf(arguments, 2); })(1, 2, 3);
      equal(result, 1, 'works on an arguments object');
      equal(_.indexOf(null, 2), -1, 'handles nulls properly');
  
      var numbers = [10, 20, 30, 40, 50], num = 35;
      var index = _.indexOf(numbers, num, true);
      equal(index, -1, '35 is not in the list');
  
      numbers = [10, 20, 30, 40, 50]; num = 40;
      index = _.indexOf(numbers, num, true);
      equal(index, 3, '40 is in the list');
  
      numbers = [1, 40, 40, 40, 40, 40, 40, 40, 50, 60, 70]; num = 40;
      index = _.indexOf(numbers, num, true);
      equal(index, 1, '40 is in the list');
  
      numbers = [1, 2, 3, 1, 2, 3, 1, 2, 3];
      index = _.indexOf(numbers, 2, 5);
      equal(index, 7, 'supports the fromIndex argument');
    });
  
    test("lastIndexOf", function() {
      var numbers = [1, 0, 1];
      equal(_.lastIndexOf(numbers, 1), 2);
  
      numbers = [1, 0, 1, 0, 0, 1, 0, 0, 0];
      numbers.lastIndexOf = null;
      equal(_.lastIndexOf(numbers, 1), 5, 'can compute lastIndexOf, even without the native function');
      equal(_.lastIndexOf(numbers, 0), 8, 'lastIndexOf the other element');
      var result = (function(){ return _.lastIndexOf(arguments, 1); })(1, 0, 1, 0, 0, 1, 0, 0, 0);
      equal(result, 5, 'works on an arguments object');
      equal(_.indexOf(null, 2), -1, 'handles nulls properly');
  
      numbers = [1, 2, 3, 1, 2, 3, 1, 2, 3];
      index = _.lastIndexOf(numbers, 2, 2);
      equal(index, 1, 'supports the fromIndex argument');
    });
  
    test("range", function() {
      equal(_.range(0).join(''), '', 'range with 0 as a first argument generates an empty array');
      equal(_.range(4).join(' '), '0 1 2 3', 'range with a single positive argument generates an array of elements 0,1,2,...,n-1');
      equal(_.range(5, 8).join(' '), '5 6 7', 'range with two arguments a &amp; b, a&lt;b generates an array of elements a,a+1,a+2,...,b-2,b-1');
      equal(_.range(8, 5).join(''), '', 'range with two arguments a &amp; b, b&lt;a generates an empty array');
      equal(_.range(3, 10, 3).join(' '), '3 6 9', 'range with three arguments a &amp; b &amp; c, c &lt; b-a, a &lt; b generates an array of elements a,a+c,a+2c,...,b - (multiplier of a) &lt; c');
      equal(_.range(3, 10, 15).join(''), '3', 'range with three arguments a &amp; b &amp; c, c &gt; b-a, a &lt; b generates an array with a single element, equal to a');
      equal(_.range(12, 7, -2).join(' '), '12 10 8', 'range with three arguments a &amp; b &amp; c, a &gt; b, c &lt; 0 generates an array of elements a,a-c,a-2c and ends with the number not less than b');
      equal(_.range(0, -10, -1).join(' '), '0 -1 -2 -3 -4 -5 -6 -7 -8 -9', 'final example in the Python docs');
    });
  
  });
  