Merge pull request #121 from davidchambers/iterators

use `_.each` and `_.map` to simplify cheerio namesakes

lib/api/traversing.js

@@ -70,32 +70,16 @@ var children = exports.children = function(selector) {
 };
 
 var each = exports.each = function(fn) {
-  var len = this.length,
-            el,
-            $;
-
-  for(var i = 0; i < len; i++) {
-    el = this[i];
-    $ = this.make(el);
-    fn.call($, i, el);
-  }
-
+  _.each(this, function(el, i) {
+    fn.call(this.make(el), i, el);
+  }, this);
   return this;
 };
 
 var map = exports.map = function(fn) {
-  var len = this.length,
-      ret = [],
-      el,
-      $;
-
-  for(var i = 0; i < len; i++) {
-    el = this[i];
-    $ = this.make(el);
-    ret[ret.length] = fn.call($, i, el);
-  }
-
-  return ret;
+  return _.map(this, function(el, i) {
+    return fn.call(this.make(el), i, el);
+  }, this);
 };
 
 var filter = exports.filter = function(match) {  
@@ -107,11 +91,11 @@ var filter = exports.filter = function(match) {
 };
 
 var first = exports.first = function() {
-    return this[0] ? this.make(this[0]) : this;
+  return this[0] ? this.make(this[0]) : this;
 };
 
 var last = exports.last = function() {
-    return this[0] ? this.make(this[this.length - 1]) : this;
+  return this[0] ? this.make(this[this.length - 1]) : this;
 };
 
 // Reduce the set of matched elements to the one at the specified index.