version 0.2.0 is out, with inject -> reduce, JS standard methodname aliases, a compose(), and a lastIndexOf()

Author: jashkenas

index.html

@@ -0,0 +1,12 @@
+// ServerJS package specification.
+{
+  "name": "underscore",
+  "description": "Functional programming aid for Javascript. Works well with jQuery.",
+  "url": "http://documentcloud.github.com/underscore/",
+  "keywords": ["util", "functional", "server", "client", "browser"],
+  "author": "Jeremy Ashkenas <jeremy@documentcloud.org>",
+  "maintainer": "Kris Kowal <kris.kowal@cixar.com>",
+  "contributors": [],
+  "dependencies": [],
+  "lib", "."
+}

package.json

@@ -49,4 +49,11 @@ $(document).ready(function() {
     equals(_.indexOf(numbers, 2), 1, 'can compute indexOf, even without the native function');
   });
 
+  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');
+  });
+  
 });

test/arrays.js

@@ -14,6 +14,10 @@ $(document).ready(function() {
     var answers = [];
     _.each([1, 2, 3], function(num) { answers.push(num * this.multiplier);}, {multiplier : 5});
     equals(answers.join(', '), '5, 10, 15', 'context object property accessed');
+    
+    answers = [];
+    _.forEach([1, 2, 3], function(num){ answers.push(num); });
+    equals(answers.join(', '), '1, 2, 3', 'aliased as "forEach"');
   });
 
   test('collections: map', function() {
@@ -24,9 +28,12 @@ $(document).ready(function() {
     equals(tripled.join(', '), '3, 6, 9', 'tripled numbers with context');
   });
 
-  test('collections: inject', function() {
-    var sum = _.inject([1,2,3], 0, function(sum, num){ return sum + num; });
+  test('collections: reduce', function() {
+    var sum = _.reduce([1, 2, 3], 0, function(sum, num){ return sum + num; });
     equals(sum, 6, 'can sum up an array');
+    
+    sum = _.inject([1, 2, 3], 0, function(sum, num){ return sum + num; });
+    equals(sum, 6, 'aliased as "inject"');
   });
 
   test('collections: detect', function() {
@@ -35,12 +42,15 @@ $(document).ready(function() {
   });
 
   test('collections: select', function() {
-    var evens = _.select([1,2,3,4,5,6], function(num){ return num % 2 == 0; });
+    var evens = _.select([1, 2, 3, 4, 5, 6], function(num){ return num % 2 == 0; });
     equals(evens.join(', '), '2, 4, 6', 'selected each even number');
+    
+    evens = _.filter([1, 2, 3, 4, 5, 6], function(num){ return num % 2 == 0; });
+    equals(evens.join(', '), '2, 4, 6', 'aliased as "filter"');
   });
 
   test('collections: reject', function() {
-    var odds = _.reject([1,2,3,4,5,6], function(num){ return num % 2 == 0; });
+    var odds = _.reject([1, 2, 3, 4, 5, 6], function(num){ return num % 2 == 0; });
     equals(odds.join(', '), '1, 3, 5', 'rejected each even number');
   });
 
@@ -50,6 +60,7 @@ $(document).ready(function() {
     ok(!_.all([true, false, true]), 'one false value');
     ok(_.all([0, 10, 28], function(num){ return num % 2 == 0; }), 'even numbers');
     ok(!_.all([0, 11, 28], function(num){ return num % 2 == 0; }), 'an odd number');
+    ok(_.every([true, true, true]), 'aliased as "every"');
   });
 
   test('collections: any', function() {
@@ -58,6 +69,7 @@ $(document).ready(function() {
     ok(_.any([false, false, true]), 'one true value');
     ok(!_.any([1, 11, 29], function(num){ return num % 2 == 0; }), 'all odd numbers');
     ok(_.any([1, 10, 29], function(num){ return num % 2 == 0; }), 'an even number');
+    ok(_.some([false, false, true]), 'aliased as "some"');
   });
 
   test('collections: include', function() {

test/collections.js

@@ -48,4 +48,14 @@ $(document).ready(function() {
     equals(backwards('moe'), 'hi: moe eom', 'wrapped the saluation function');
   });
 
+  test("functions: compose", function() {
+    var greet = function(name){ return "hi: " + name; };
+    var exclaim = function(sentence){ return sentence + '!'; };
+    var composed = _.compose(exclaim, greet);
+    equals(composed('moe'), 'hi: moe!', 'can compose a function that takes another');
+    
+    composed = _.compose(greet, exclaim);
+    equals(composed('moe'), 'hi: moe!', 'in this case, the functions are also commutative');
+  });
+  
 });

test/functions.js

@@ -5,6 +5,8 @@ $(document).ready(function() {
   test("utility: noConflict", function() {
     var underscore = _.noConflict();
     ok(underscore.isUndefined(_), "The '_' variable has been returned to its previous state.");
+    var intersection = underscore.intersect([-1, 0, 1, 2], [1, 2, 3, 4]);
+    equals(intersection.join(', '), '1, 2', 'but the intersection function still works');
     window._ = underscore;
   });