add #times utility method.

_(3).times(alert)

added tests and internal docs

test/objects.js

@@ -17,7 +17,7 @@ $(document).ready(function() {
     "indexOf", "inject", "intersect", "invoke", "isArguments", "isArray", "isDate", "isElement", "isEmpty", "isEqual",
     "isFunction", "isNaN", "isNull", "isNumber", "isRegExp", "isString", "isUndefined", "keys", "last", "lastIndexOf", "map", "max",
     "methods", "min", "noConflict", "pluck", "range", "reduce", "reduceRight", "reject", "rest", "select",
-    "size", "some", "sortBy", "sortedIndex", "tail", "tap", "template", "toArray", "uniq",
+    "size", "some", "sortBy", "sortedIndex", "tail", "tap", "template", "times", "toArray", "uniq",
     "uniqueId", "values", "without", "wrap", "zip"];
     ok(_(expected).isEqual(_.methods(_)), 'provides a sorted list of functions');
     var obj = {a : 'dash', b : _.map, c : (/yo/), d : _.reduce};

test/utility.js

@@ -29,6 +29,17 @@ $(document).ready(function() {
     while(i++ < 100) ids.push(_.uniqueId());
     equals(_.uniq(ids).length, ids.length, 'can generate a globally-unique stream of ids');
   });
+  
+  test("utility: times", function() {
+    var vals = [];
+    _.times(3, function (i) { vals.push(i); });
+    ok(_.isEqual(vals, [0,1,2]), "is 0 indexed");
+    //
+    vals = [];
+    _(3).times(function (i) { vals.push(i); });
+    ok(_.isEqual(vals, [0,1,2]), "works as a wrapper");
+  });
+  
 
   test("utility: template", function() {
     var basicTemplate = _.template("<%= thing %> is gettin' on my noives!");

underscore.js

@@ -589,6 +589,13 @@
   _.identity = function(value) {
     return value;
   };
+  
+  // run a function n times.  
+  // looks good in wrapper form:
+  //    _(3).times(alert)
+  _.times = function (n, fn, context) {
+    for (var i=0; i < n; i++)  fn.call(context, i)
+  };
 
   // Break out of the middle of an iteration.
   _.breakLoop = function() {