Cleanup compareAscending and createBound.

Former-commit-id: e783a68666aaea16d917fa1db74d2092e5dcaa9a

lodash.js

@@ -240,19 +240,16 @@
    * @returns {Number} Returns the sort order indicator of `1` or `-1`.
    */
   function compareAscending(a, b) {
-    var ai = a.index,
-        bi = b.index;
-
-    a = a.criteria;
-    b = b.criteria;
+    var ac = a.criteria;
+        bc = b.criteria;
 
     // ensure a stable sort in V8 and other engines
     // http://code.google.com/p/v8/issues/detail?id=90
-    if (a !== b) {
-      if (a > b || typeof a == 'undefined') {
+    if (ac !== bc) {
+      if (ac > bc || typeof ac == 'undefined') {
         return 1;
       }
-      if (a < b || typeof b == 'undefined') {
+      if (ac < bc || typeof bc == 'undefined') {
         return -1;
       }
     }
@@ -260,7 +257,7 @@
     // `Array#sort` implementation that causes it, under certain circumstances,
     // to return the same value for `a` and `b`.
     // See https://github.com/jashkenas/underscore/pull/1247
-    return ai < bi ? -1 : (ai > bi ? 1 : 0);
+    return a.index - b.index;
   }
 
   /**
@@ -1431,8 +1428,9 @@
      *  1 - `_.bind`
      *  2 - `_.bindKey`
      *  4 - `_.curry`
-     *  8 - `_.partial`
-     *  16 - `_.partialRight`
+     *  8 - `_.curry` (bound)
+     *  16 - `_.partial`
+     *  32 - `_.partialRight`
      * @param {Array} [partialArgs] An array of arguments to prepend to those
      *  provided to the new function.
      * @param {Array} [partialRightArgs] An array of arguments to append to those
@@ -1445,8 +1443,9 @@
       var isBind = bitmask & 1,
           isBindKey = bitmask & 2,
           isCurry = bitmask & 4,
-          isPartial = bitmask & 8,
-          isPartialRight = bitmask & 16;
+          isCurryBound = bitmask & 8,
+          isPartial = bitmask & 16,
+          isPartialRight = bitmask & 32;
 
       if (!isBindKey && !isFunction(func)) {
         throw new TypeError;
@@ -1456,6 +1455,9 @@
         if (isBind && !(bindData[1] & 1)) {
           bindData[4] = thisArg;
         }
+        if (!isBind && bindData[1] & 1) {
+          bitmask |= 8;
+        }
         if (isCurry && !(bindData[1] & 4)) {
           bindData[5] = arity;
         }
@@ -1490,7 +1492,8 @@
             push.apply(args, partialRightArgs);
           }
           if (isCurry && args.length < arity) {
-            return createBound(func, 12, args, null, null, arity);
+            bitmask |= 16 & ~32
+            return createBound(func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity);
           }
           if (isBindKey) {
             func = thisBinding[key];
@@ -5070,7 +5073,7 @@
      * // => 'hi moe'
      */
     function bind(func, thisArg) {
-      return createBound(func, 9, nativeSlice.call(arguments, 2), null, thisArg);
+      return createBound(func, 17, nativeSlice.call(arguments, 2), null, thisArg);
     }
 
     /**
@@ -5144,7 +5147,7 @@
      * // => 'hi, moe!'
      */
     function bindKey(object, key) {
-      return createBound(object, 11, nativeSlice.call(arguments, 2), null, key);
+      return createBound(object, 19, nativeSlice.call(arguments, 2), null, key);
     }
 
     /**
@@ -5571,7 +5574,7 @@
      * // => 'hi moe'
      */
     function partial(func) {
-      return createBound(func, 8, nativeSlice.call(arguments, 1));
+      return createBound(func, 16, nativeSlice.call(arguments, 1));
     }
 
     /**
@@ -5602,7 +5605,7 @@
      * // => { '_': _, 'jq': $ }
      */
     function partialRight(func) {
-      return createBound(func, 16, null, nativeSlice.call(arguments, 1));
+      return createBound(func, 32, null, nativeSlice.call(arguments, 1));
     }
 
     /**