Cleanup baseOrderBy.

.internal/baseOrderBy.js

@@ -4,8 +4,7 @@ import baseGet from './baseGet.js'
 import compareMultiple from './compareMultiple.js'
 import isArrayLike from '../isArrayLike.js'
 
-// As existing identity function is in ../test/utils.js, so defining it here, it can be moved to utils
-const identity = value => value;
+const identity = (value) => value
 
 /**
  * The base implementation of `orderBy` without param guards.
@@ -17,20 +16,31 @@ const identity = value => value;
  * @returns {Array} Returns the new sorted array.
  */
 function baseOrderBy(collection, iteratees, orders) {
+  if (iteratees.length) {
+    iteratees = iteratees.map((iteratee) => {
+      if (Array.isArray(iteratee)) {
+        return (value) => baseGet(value, iteratee)
+      }
+
+      return iteratee
+    })
+  } else {
+    iteratees = [identity]
+  }
+
   let criteriaIndex = -1
   let eachIndex = -1
-  iteratees = iteratees.length ? iteratees.map((iteratee) => {
-    if (Array.isArray(iteratee)) {
-      return (value) => baseGet(value, iteratee)
-    }
-    return iteratee
-  }) : [identity]
 
   const result = isArrayLike(collection) ? new Array(collection.length) : []
 
   baseEach(collection, (value) => {
     const criteria = iteratees.map((iteratee) => iteratee(value))
-    result[++eachIndex] = { 'criteria': criteria, 'index': ++criteriaIndex, 'value': value }
+
+    result[++eachIndex] = {
+      criteria,
+      index: ++criteriaIndex,
+      value
+    }
   })
 
   return baseSortBy(result, (object, other) => compareMultiple(object, other, orders))