Some simple code cleanups

- Moves createAssigner to just above where it's needed.
- Use function expressions, not declarations.

Author: jridgewell

underscore.js

@@ -94,24 +94,6 @@
     return cb(value, context, Infinity);
   };
 
-  // An internal function for creating assigner functions.
-  var createAssigner = function(keysFunc, undefinedOnly) {
-    return function(obj) {
-      var length = arguments.length;
-      if (length < 2 || obj == null) return obj;
-      for (var index = 1; index < length; index++) {
-        var source = arguments[index],
-            keys = keysFunc(source),
-            l = keys.length;
-        for (var i = 0; i < l; i++) {
-          var key = keys[i];
-          if (!undefinedOnly || obj[key] === void 0) obj[key] = source[key];
-        }
-      }
-      return obj;
-    };
-  };
-
   // An internal function for creating a new object that inherits from another.
   var baseCreate = function(prototype) {
     if (!_.isObject(prototype)) return {};
@@ -175,16 +157,16 @@
   };
 
   // Create a reducing function iterating left or right.
-  function createReduce(dir) {
+  var createReduce = function(dir) {
     // Optimized iterator function as using arguments.length
     // in the main function will deoptimize the, see #1991.
-    function iterator(obj, iteratee, memo, keys, index, length) {
+    var iterator = function(obj, iteratee, memo, keys, index, length) {
       for (; index >= 0 && index < length; index += dir) {
         var currentKey = keys ? keys[index] : index;
         memo = iteratee(memo, obj[currentKey], currentKey, obj);
       }
       return memo;
-    }
+    };
 
     return function(obj, iteratee, memo, context) {
       iteratee = optimizeCb(iteratee, context, 4);
@@ -198,7 +180,7 @@
       }
       return iterator(obj, iteratee, memo, keys, index, length);
     };
-  }
+  };
 
   // **Reduce** builds up a single result from a list of values, aka `inject`,
   // or `foldl`.
@@ -606,7 +588,7 @@
   };
 
   // Generator function to create the findIndex and findLastIndex functions
-  function createPredicateIndexFinder(dir) {
+  var createPredicateIndexFinder = function(dir) {
     return function(array, predicate, context) {
       predicate = cb(predicate, context);
       var length = getLength(array);
@@ -616,7 +598,7 @@
       }
       return -1;
     };
-  }
+  };
 
   // Returns the first index on an array-like that passes a predicate test
   _.findIndex = createPredicateIndexFinder(1);
@@ -636,7 +618,7 @@
   };
 
   // Generator function to create the indexOf and lastIndexOf functions
-  function createIndexFinder(dir, predicateFind, sortedIndex) {
+  var createIndexFinder = function(dir, predicateFind, sortedIndex) {
     return function(array, item, idx) {
       var i = 0, length = getLength(array);
       if (typeof idx == 'number') {
@@ -658,7 +640,7 @@
       }
       return -1;
     };
-  }
+  };
 
   // Return the position of the first occurrence of an item in an array,
   // or -1 if the item is not included in the array.
@@ -901,7 +883,7 @@
   var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
                       'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
 
-  function collectNonEnumProps(obj, keys) {
+  var collectNonEnumProps = function(obj, keys) {
     var nonEnumIdx = nonEnumerableProps.length;
     var constructor = obj.constructor;
     var proto = (_.isFunction(constructor) && constructor.prototype) || ObjProto;
@@ -916,7 +898,7 @@
         keys.push(prop);
       }
     }
-  }
+  };
 
   // Retrieve the names of an object's own properties.
   // Delegates to **ECMAScript 5**'s native `Object.keys`
@@ -997,6 +979,24 @@
     return names.sort();
   };
 
+  // An internal function for creating assigner functions.
+  var createAssigner = function(keysFunc, undefinedOnly) {
+    return function(obj) {
+      var length = arguments.length;
+      if (length < 2 || obj == null) return obj;
+      for (var index = 1; index < length; index++) {
+        var source = arguments[index],
+            keys = keysFunc(source),
+            l = keys.length;
+        for (var i = 0; i < l; i++) {
+          var key = keys[i];
+          if (!undefinedOnly || obj[key] === void 0) obj[key] = source[key];
+        }
+      }
+      return obj;
+    };
+  };
+
   // Extend a given object with all the properties in passed-in object(s).
   _.extend = createAssigner(_.allKeys);