Merge pull request graphql#636 from dcavalcante/source

Changed GraphQL.js Tutorial to arrow functions

Author: orta

site/graphql-js/Guides-ConstructingTypes.md

@@ -41,7 +41,7 @@ var fakeDatabase = {
 };
 
 var root = {
-  user: function ({id}) {
+  user: ({id}) => {
     return fakeDatabase[id];
   }
 };
@@ -94,7 +94,7 @@ var queryType = new graphql.GraphQLObjectType({
       args: {
         id: { type: graphql.GraphQLString }
       },
-      resolve: function (_, {id}) {
+      resolve: (_, {id}) => {
         return fakeDatabase[id];
       }
     }

site/graphql-js/Tutorial-Authentication.md

@@ -24,7 +24,7 @@ var schema = buildSchema(`
   }
 `);
 
-function loggingMiddleware(req, res, next) {
+const loggingMiddleware = (req, res, next) => {
   console.log('ip:', req.ip);
   next();
 }

site/graphql-js/Tutorial-Mutations.md

@@ -27,11 +27,11 @@ Both mutations and queries can be handled by root resolvers, so the root that im
 ```javascript
 var fakeDatabase = {};
 var root = {
-  setMessage: function ({message}) {
+  setMessage: ({message}) => {
     fakeDatabase.message = message;
     return message;
   },
-  getMessage: function () {
+  getMessage: () => {
     return fakeDatabase.message;
   }
 };
@@ -112,20 +112,20 @@ class Message {
 var fakeDatabase = {};
 
 var root = {
-  getMessage: function ({id}) {
+  getMessage: ({id}) => {
     if (!fakeDatabase[id]) {
       throw new Error('no message exists with id ' + id);
     }
     return new Message(id, fakeDatabase[id]);
   },
-  createMessage: function ({input}) {
+  createMessage: ({input}) => {
     // Create a random id for our "database".
     var id = require('crypto').randomBytes(10).toString('hex');
 
     fakeDatabase[id] = input;
     return new Message(id, input);
   },
-  updateMessage: function ({id, input}) {
+  updateMessage: ({id, input}) => {
     if (!fakeDatabase[id]) {
       throw new Error('no message exists with id ' + id);
     }

site/graphql-js/Tutorial-ObjectTypes.md

@@ -50,7 +50,7 @@ class RandomDie {
 }
 
 var root = {
-  getDie: function ({numSides}) {
+  getDie: ({numSides}) => {
     return new RandomDie(numSides || 6);
   }
 }
@@ -111,7 +111,7 @@ class RandomDie {
 
 // The root provides the top-level API endpoints
 var root = {
-  getDie: function ({numSides}) {
+  getDie: ({numSides}) => {
     return new RandomDie(numSides || 6);
   }
 }

site/graphql-js/Tutorial-PassingArguments.md

@@ -28,7 +28,7 @@ So far, our resolver functions took no arguments. When a resolver takes argument
 
 ```javascript
 var root = {
-  rollDice: function (args) {
+  rollDice: (args) => {
     var output = [];
     for (var i = 0; i < args.numDice; i++) {
       output.push(1 + Math.floor(Math.random() * (args.numSides || 6)));
@@ -42,7 +42,7 @@ It's convenient to use [ES6 destructuring assignment](https://developer.mozilla.
 
 ```javascript
 var root = {
-  rollDice: function ({numDice, numSides}) {
+  rollDice: ({numDice, numSides}) => {
     var output = [];
     for (var i = 0; i < numDice; i++) {
       output.push(1 + Math.floor(Math.random() * (numSides || 6)));
@@ -70,7 +70,7 @@ var schema = buildSchema(`
 
 // The root provides a resolver function for each API endpoint
 var root = {
-  rollDice: function ({numDice, numSides}) {
+  rollDice: ({numDice, numSides}) => {
     var output = [];
     for (var i = 0; i < numDice; i++) {
       output.push(1 + Math.floor(Math.random() * (numSides || 6)));