string.js: started extracting functions into own modules; count() extracted

Author: jprichardson

lib/_count.js

@@ -0,0 +1,13 @@
+function count(self, substr) {
+  var count = 0
+  var pos = self.indexOf(substr)
+
+  while (pos >= 0) {
+    count += 1
+    pos = self.indexOf(substr, pos + 1)
+  }
+
+  return count
+}
+
+module.exports = count

lib/string.js

@@ -121,15 +121,7 @@ string.js - Copyright (C) 2012-2014, JP Richardson <[email protected]>
     },
 
     count: function(ss) {
-      var count = 0
-        , pos = this.s.indexOf(ss)
-
-      while (pos >= 0) {
-        count += 1
-        pos = this.s.indexOf(ss, pos + 1)
-      }
-
-      return count
+      return require('./_count')(this.s, ss)
     },
 
     //#modified from https://github.com/epeli/underscore.string