avoiding babel dependency on Symbol

Babel depends on `Symbol` to transpile `for of` and array
destructuring.
IE doesn't support Symbol, and those 2 ES6 features are better avoided
anyway.

Author: beneidel

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jsondiffpatch",
-  "version": "0.3.8",
+  "version": "0.3.9",
   "author": "Benjamin Eidelman <beneidel@gmail.com>",
   "description": "Diff & Patch for Javascript objects",
   "contributors": [

src/formatters/jsonpatch.js

@@ -140,16 +140,16 @@ const partition = (arr, pred) => {
 
 const partitionRemovedOps = jsonFormattedDiff => {
   const isRemoveOp = ({op}) => op === 'remove';
-  const removeOpsOtherOps = partition(
+  return partition(
     jsonFormattedDiff,
     isRemoveOp
   );
-  return removeOpsOtherOps;
 };
 
 const reorderOps = jsonFormattedDiff => {
-  const [removeOps, otherOps] = partitionRemovedOps(jsonFormattedDiff);
-
+  const removeOpsOtherOps = partitionRemovedOps(jsonFormattedDiff);
+  const removeOps = removeOpsOtherOps[0];
+  const otherOps = removeOpsOtherOps[1];
   const removeOpsReverse = opsByDescendingOrder(removeOps);
   return removeOpsReverse.concat(otherOps);
 };

src/pipe.js

@@ -55,13 +55,7 @@ class Pipe {
   }
 
   list() {
-    let names = [];
-
-    for (let filter of this.filters) {
-      names.push(filter.filterName);
-    }
-
-    return names;
+    return this.filters.map(f => f.filterName);
   }
 
   after(filterName) {