config: refactor to use Object.assign (#17563)

Object.assign is available in Node >= 4

PR-URL: https://github.com/npm/npm/pull/17563
Credit: @vramana
Reviewed-By: @zkat

2 files changed, 2 insertions, 5 deletions

diff --git a/lib/config/cmd-list.js b/lib/config/cmd-list.js
index b3aba7d91..f2d5fab17 100644
--- a/lib/config/cmd-list.js
+++ b/lib/config/cmd-list.js
@@ -1,5 +1,3 @@
-var extend = Object.assign || require('util')._extend
-
 // short names for common things
 var shorthands = {
   'un': 'uninstall',
@@ -112,7 +110,7 @@ var plumbing = [
   'substack',
   'visnup'
 ]
-module.exports.aliases = extend(extend({}, shorthands), affordances)
+module.exports.aliases = Object.assign({}, shorthands, affordances)
 module.exports.shorthands = shorthands
 module.exports.affordances = affordances
 module.exports.cmdList = cmdList
diff --git a/lib/ls.js b/lib/ls.js
index bd7465e64..67f09485f 100644
--- a/lib/ls.js
+++ b/lib/ls.js
@@ -14,7 +14,6 @@ var semver = require('semver')
 var color = require('ansicolors')
 var npa = require('npm-package-arg')
 var sortedObject = require('sorted-object')
-var extend = Object.assign || require('util')._extend
 var npm = require('./npm.js')
 var mutateIntoLogicalTree = require('./install/mutate-into-logical-tree.js')
 var computeMetadata = require('./install/deps.js').computeMetadata
@@ -266,7 +265,7 @@ function unloop (root) {
       var dep = deps[d]
       if (dep.missing && !dep.dependencies) return
       if (dep.path && seen[dep.path]) {
-        dep = deps[d] = extend({}, dep)
+        dep = deps[d] = Object.assign({}, dep)
         dep.dependencies = {}
         dep._deduped = path.relative(root.path, dep.path).replace(/node_modules\//g, '')
         return