0.4.0 is out, with OOP-style and chaining

test/chaining.js

@@ -0,0 +1,35 @@
+$(document).ready(function() {
+  
+  module("Underscore chaining.");
+    
+  test("chaining: map/flatten/reduce", function() {
+    var lyrics = [
+      "I'm a lumberjack and I'm okay",
+      "I sleep all night and I work all day",
+      "He's a lumberjack and he's okay",
+      "He sleeps all night and he works all day"
+    ];
+    var counts = _(lyrics).chain()
+      .map(function(line) { return line.split(''); })
+      .flatten()
+      .reduce({}, function(hash, l) { 
+        hash[l] = hash[l] || 0;
+        hash[l]++;
+        return hash;
+    }).get();
+    ok(counts['a'] == 16 && counts['e'] == 10, 'counted all the letters in the song');
+  });
+  
+  test("chaining: select/reject/sortBy", function() {
+    var numbers = [1,2,3,4,5,6,7,8,9,10];
+    numbers = _(numbers).chain().select(function(n) {
+      return n % 2 == 0;
+    }).reject(function(n) {
+      return n % 4 == 0;
+    }).sortBy(function(n) {
+      return -n;
+    }).get();
+    equals(numbers.join(', '), "10, 6, 2", "filtered and reversed the numbers");
+  });
+  
+});