refactor: switch from var => let/const

src/change.js

@@ -16,8 +16,8 @@
 
 'use strict';
 
-var common = require('@google-cloud/common');
-var util = require('util');
+const common = require('@google-cloud/common');
+const util = require('util');
 
 /**
  * @class
@@ -32,7 +32,7 @@ var util = require('util');
  * const change = zone.change('change-id');
  */
 function Change(zone, id) {
-  var methods = {
+  const methods = {
     /**
      * @typedef {array} ChangeExistsResponse
      * @property {boolean} 0 Whether the {@link Change} exists.
@@ -61,7 +61,7 @@ function Change(zone, id) {
      * // If the callback is omitted, we'll return a Promise.
      * //-
      * change.exists().then(function(data) {
-     *   var exists = data[0];
+     *   const exists = data[0];
      * });
      */
     exists: true,
@@ -106,8 +106,8 @@ function Change(zone, id) {
      * // If the callback is omitted, we'll return a Promise.
      * //-
      * change.get().then(function(data) {
-     *   var change = data[0];
-     *   var apiResponse = data[1];
+     *   const change = data[0];
+     *   const apiResponse = data[1];
      * });
      */
     get: true,
@@ -156,8 +156,8 @@ function Change(zone, id) {
      * // If the callback is omitted, we'll return a Promise.
      * //-
      * change.getMetadata().then(function(data) {
-     *   var metadata = data[0];
-     *   var apiResponse = data[1];
+     *   const metadata = data[0];
+     *   const apiResponse = data[1];
      * });
      */
     getMetadata: true,
@@ -223,7 +223,7 @@ util.inherits(Change, common.ServiceObject);
  * });
  */
 Change.prototype.create = function(config, callback) {
-  var self = this;
+  const self = this;
 
   this.parent.createChange(config, function(err, change, apiResponse) {
     if (err) {

src/index.js

@@ -16,13 +16,13 @@
 
 'use strict';
 
-var arrify = require('arrify');
-var common = require('@google-cloud/common');
-var extend = require('extend');
-var is = require('is');
-var util = require('util');
+const arrify = require('arrify');
+const common = require('@google-cloud/common');
+const extend = require('extend');
+const is = require('is');
+const util = require('util');
 
-var Zone = require('./zone.js');
+const Zone = require('./zone.js');
 
 /**
  * @typedef {object} ClientConfig
@@ -85,7 +85,7 @@ function DNS(options) {
 
   options = common.util.normalizeArguments(this, options);
 
-  var config = {
+  const config = {
     baseUrl: 'https://www.googleapis.com/dns/v1',
     scopes: [
       'https://www.googleapis.com/auth/ndev.clouddns.readwrite',
@@ -156,7 +156,7 @@ util.inherits(DNS, common.Service);
  * });
  */
 DNS.prototype.createZone = function(name, config, callback) {
-  var self = this;
+  const self = this;
 
   if (!name) {
     throw new Error('A zone name is required.');
@@ -183,7 +183,7 @@ DNS.prototype.createZone = function(name, config, callback) {
         return;
       }
 
-      var zone = self.zone(resp.name);
+      const zone = self.zone(resp.name);
       zone.metadata = resp;
 
       callback(null, zone, resp);
@@ -237,7 +237,7 @@ DNS.prototype.createZone = function(name, config, callback) {
  * });
  */
 DNS.prototype.getZones = function(query, callback) {
-  var self = this;
+  const self = this;
 
   if (is.fn(query)) {
     callback = query;
@@ -255,13 +255,13 @@ DNS.prototype.getZones = function(query, callback) {
         return;
       }
 
-      var zones = arrify(resp.managedZones).map(function(zone) {
-        var zoneInstance = self.zone(zone.name);
+      const zones = arrify(resp.managedZones).map(function(zone) {
+        const zoneInstance = self.zone(zone.name);
         zoneInstance.metadata = zone;
         return zoneInstance;
       });
 
-      var nextQuery = null;
+      let nextQuery = null;
 
       if (resp.nextPageToken) {
         nextQuery = extend({}, query, {

src/record.js

@@ -16,10 +16,10 @@
 
 'use strict';
 
-var arrify = require('arrify');
-var common = require('@google-cloud/common');
-var extend = require('extend');
-var format = require('string-format-obj');
+const arrify = require('arrify');
+const common = require('@google-cloud/common');
+const extend = require('extend');
+const format = require('string-format-obj');
 
 /**
  * Create a Resource Record object.
@@ -89,7 +89,7 @@ function Record(zone, type, metadata) {
  * @returns {Record}
  */
 Record.fromZoneRecord_ = function(zone, type, bindData) {
-  var typeToZoneFormat = {
+  const typeToZoneFormat = {
     a: '{ip}',
     aaaa: '{ip}',
     cname: '{alias}',
@@ -101,7 +101,7 @@ Record.fromZoneRecord_ = function(zone, type, bindData) {
     txt: '{txt}',
   };
 
-  var metadata = {
+  const metadata = {
     data: format(typeToZoneFormat[type.toLowerCase()], bindData),
     name: bindData.name,
     ttl: bindData.ttl,
@@ -154,8 +154,8 @@ Record.fromZoneRecord_ = function(zone, type, bindData) {
  * // If the callback is omitted, we'll return a Promise.
  * //-
  * record.delete().then(function(data) {
- *   var change = data[0];
- *   var apiResponse = data[1];
+ *   const change = data[0];
+ *   const apiResponse = data[1];
  * });
  */
 Record.prototype.delete = function(callback) {
@@ -168,7 +168,7 @@ Record.prototype.delete = function(callback) {
  * @returns {object}
  */
 Record.prototype.toJSON = function() {
-  var recordObject = extend({}, this.metadata, {
+  const recordObject = extend({}, this.metadata, {
     type: this.type.toUpperCase(),
   });
 
@@ -186,7 +186,7 @@ Record.prototype.toJSON = function() {
  * @returns {string}
  */
 Record.prototype.toString = function() {
-  var json = this.toJSON();
+  const json = this.toJSON();
 
   return (json.rrdatas || [{}])
     .map(function(data) {