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Underscore 0.4.5, with first/rest, head/tail, and all Array functions…
… guaranteed to work on 'arguments' objects. Many method implementations reworked to use _.rest()
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,76 +1,89 @@ | ||
| $(document).ready(function() { | ||
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| module("Array-only functions (last, compact, uniq, and so on...)"); | ||
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| test("arrays: first", function() { | ||
| equals(_.first([1,2,3]), 1, 'can pull out the first element of an array'); | ||
| equals(_([1, 2, 3]).first(), 1, 'can perform OO-style "first()"'); | ||
| equals(_.first([1,2,3], 2).join(', '), '1, 2', 'can pass an index to first'); | ||
| var result = (function(){ return _.first(arguments); })(4, 3, 2, 1); | ||
| equals(result, 4, 'works on an arguments object.'); | ||
| }); | ||
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| test("arrays: rest", function() { | ||
| var numbers = [1, 2, 3, 4]; | ||
| equals(_.rest(numbers).join(", "), "2, 3, 4", 'working rest()'); | ||
| equals(_.rest(numbers, 2).join(', '), '3, 4', 'rest can take an index'); | ||
| var result = (function(){ return _(arguments).tail(); })(1, 2, 3, 4); | ||
| equals(result.join(', '), '2, 3, 4', 'aliased as tail and works on arguments object'); | ||
| }); | ||
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| test("arrays: last", function() { | ||
| equals(_.last([1,2,3]), 3, 'can pull out the last element of an array'); | ||
| var result = (function(){ return _(arguments).last(); })(1, 2, 3, 4); | ||
| equals(result, 4, 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: compact", function() { | ||
| equals(_.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); | ||
| equals(result, 3, 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: flatten", function() { | ||
| var list = [1, [2], [3, [[[4]]]]]; | ||
| equals(_.flatten(list).join(', '), '1, 2, 3, 4', 'can flatten nested arrays'); | ||
| var result = (function(){ return _.flatten(arguments); })(1, [2], [3, [[[4]]]]); | ||
| equals(result.join(', '), '1, 2, 3, 4', 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: without", function() { | ||
| var list = [1, 2, 1, 0, 3, 1, 4]; | ||
| equals(_.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); | ||
| equals(result.join(', '), '2, 3, 4', 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: uniq", function() { | ||
| var list = [1, 2, 1, 3, 1, 4]; | ||
| equals(_.uniq(list).join(', '), '1, 2, 3, 4', 'can find the unique values of an unsorted array'); | ||
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| var list = [1, 1, 1, 2, 2, 3]; | ||
| equals(_.uniq(list, true).join(', '), '1, 2, 3', 'can find the unique values of a sorted array faster'); | ||
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| var result = (function(){ return _.uniq(arguments); })(1, 2, 1, 3, 1, 4); | ||
| equals(result.join(', '), '1, 2, 3, 4', 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: intersect", function() { | ||
| var stooges = ['moe', 'curly', 'larry'], leaders = ['moe', 'groucho']; | ||
| equals(_.intersect(stooges, leaders).join(''), 'moe', 'can take the set intersection of two arrays'); | ||
| equals(_(stooges).intersect(leaders).join(''), 'moe', 'can perform an OO-style intersection'); | ||
| var result = (function(){ return _.intersect(arguments, leaders); })('moe', 'curly', 'larry'); | ||
| equals(result.join(''), 'moe', 'works an an arguments object'); | ||
| }); | ||
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| test('arrays: zip', function() { | ||
| var names = ['moe', 'larry', 'curly'], ages = [30, 40, 50], leaders = [true]; | ||
| var stooges = _.zip(names, ages, leaders); | ||
| equals(String(stooges), 'moe,30,true,larry,40,,curly,50,', 'zipped together arrays of different lengths'); | ||
| }); | ||
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| test("arrays: indexOf", function() { | ||
| var numbers = [1, 2, 3]; | ||
| numbers.indexOf = null; | ||
| equals(_.indexOf(numbers, 2), 1, 'can compute indexOf, even without the native function'); | ||
| var result = (function(){ return _.indexOf(arguments, 2); })(1, 2, 3); | ||
| equals(result, 1, 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: lastIndexOf", function() { | ||
| var numbers = [1, 0, 1, 0, 0, 1, 0, 0, 0]; | ||
| numbers.lastIndexOf = null; | ||
| equals(_.lastIndexOf(numbers, 1), 5, 'can compute lastIndexOf, even without the native function'); | ||
| equals(_.lastIndexOf(numbers, 0), 8, 'lastIndexOf the other element'); | ||
| var result = (function(){ return _.lastIndexOf(arguments, 1); })(1, 0, 1, 0, 0, 1, 0, 0, 0); | ||
| equals(result, 5, 'works on an arguments object'); | ||
| }); | ||
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| test("arrays: tail", function() { | ||
| var numbers = [1, 2, 3, 4]; | ||
| equals(_.tail(numbers).join(", "), "2, 3, 4"); | ||
| }); | ||
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| test("arrays: init", function() { | ||
| var numbers = [1, 2, 3, 4]; | ||
| equals(_.init(numbers).join(", "), "1, 2, 3"); | ||
| }); | ||
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| test("arrays: reverse", function() { | ||
| var numbers = [1, 2, 4, 6]; | ||
| equals(_.reverse(numbers).join(", "), "6, 4, 2, 1"); | ||
| }); | ||
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| }); |
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