Refactor to improve bundle size

Author: wooorm

Diff for: index.js

@@ -7,29 +7,18 @@ module.exports = modifierFactory
 // Turn `callback` into a child-modifier accepting a parent.  See
 // `array-iterate` for more info.
 function modifierFactory(callback) {
-  return iteratorFactory(wrapperFactory(callback))
-}
-
-// Turn `callback` into a `iterator' accepting a parent.
-function iteratorFactory(callback) {
   return iterator
 
   function iterator(parent) {
-    var children = parent && parent.children
-
-    if (!children) {
+    if (!parent || !parent.children) {
       throw new Error('Missing children in `parent` for `modifier`')
     }
 
-    iterate(children, callback, parent)
+    iterate(parent.children, iteratee, parent)
   }
-}
-
-// Pass the context as the third argument to `callback`.
-function wrapperFactory(callback) {
-  return wrapper
 
-  function wrapper(value, index) {
+  // Pass the context as the third argument to `callback`.
+  function iteratee(value, index) {
     return callback(value, index, this)
   }
 }