From 6b4fdb8fffa2ccbb8c57702f6e1a268f3f0e16b2 Mon Sep 17 00:00:00 2001
From: RameshChoudhary <ramesh_srch@outlook.com>
Date: Tue, 15 Mar 2016 16:50:47 +0530
Subject: [PATCH] Modified mergeArrays function to accept arrays of different
 length.

Modified mergeArrays function to accept arrays of different length and merge the content of arrays.
---
 lib/config-loader.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/config-loader.js b/lib/config-loader.js
index c2baf32..fb99378 100644
--- a/lib/config-loader.js
+++ b/lib/config-loader.js
@@ -2,7 +2,7 @@ var fs = require('fs');
 var path = require('path');
 var debug = require('debug')('loopback:boot:config-loader');
 var assert = require('assert');
-
+var _=require('lodash');
 var ConfigLoader = exports;
 
 /**
@@ -276,8 +276,7 @@ function mergeSingleItemOrProperty(target, config, key, fullKey) {
 
 function mergeArrays(target, config, keyPrefix) {
   if (target.length !== config.length) {
-    return 'Cannot merge array values of different length' +
-      ' for the option `' + keyPrefix + '`.';
+    return mergeArraysDiffLength(target, config);
   }
 
   // Use for(;;) to iterate over undefined items, for(in) would skip them.
@@ -290,6 +289,12 @@ function mergeArrays(target, config, keyPrefix) {
   return null; // no error
 }
 
+function mergeArraysDiffLength(target, config) {
+  var newTarget = _.cloneDeep(target, true);
+  Array.prototype.splice.apply(target, [0, target.length].concat(_.union(newTarget, config)));
+}
+
+
 function hasCompatibleType(origValue, newValue) {
   if (origValue === null || origValue === undefined)
     return true;