From 7ccbdac37bc50f7d6c9ded766170d8b2f22cc1d9 Mon Sep 17 00:00:00 2001
From: Bala Clark <bala.clark@clock.co.uk>
Date: Wed, 15 Jul 2015 10:47:44 +0200
Subject: [PATCH] use arrow function syntax where possible

---
 app/comic-book.js       | 37 +++++++++++++++++++------------------
 test/comic-book.test.js |  8 ++++----
 2 files changed, 23 insertions(+), 22 deletions(-)

diff --git a/app/comic-book.js b/app/comic-book.js
index e764a4e..977af1d 100644
--- a/app/comic-book.js
+++ b/app/comic-book.js
@@ -22,25 +22,26 @@ module.exports = class ComicBook extends EventEmitter {
   }
 
   preload () {
+    let self = this
+
     this.emit('preload:start')
-    this.srcs.forEach(loadImage.bind(this))
-  }
-}
-
-function loadImage (src, pageIndex) {
-  let self = this
-  let image = new window.Image()
-
-  image.src = src
-  image.onload = setImage
-
-  function setImage () {
-    self.pages.set(pageIndex, this)
-    self.emit('preload:image', this)
-
-    if (self.pages.size === self.srcs.size) {
-      self.emit('preload:finish')
-    }
+
+    this.srcs.forEach((src, pageIndex) => {
+      let image = new window.Image()
+
+      image.src = src
+      image.onload = setImage
+
+      function setImage () {
+        self.pages.set(pageIndex, this)
+        self.emit('preload:image', this)
+
+        if (self.pages.size === self.srcs.size) {
+          self.emit('preload:finish')
+        }
+      }
+    })
   }
+
 }
 
diff --git a/test/comic-book.test.js b/test/comic-book.test.js
index 1eec13c..e850dd0 100644
--- a/test/comic-book.test.js
+++ b/test/comic-book.test.js
@@ -12,13 +12,13 @@ describe('ComicBook', function () {
 
   describe('preload images', function () {
 
-    it('should preload all given image srcs and emit preload:image, preload:finish events', function (done) {
+    it('should preload all given image srcs and emit preload:image, preload:finish events', done => {
       let comic = new ComicBook(srcs)
       let loaded = []
 
       comic.on('preload:image', image => loaded.push(image.src))
 
-      comic.on('preload:finish', function () {
+      comic.on('preload:finish', () => {
         assert.deepEqual(loaded, srcs, 'all requested images should have been loaded')
         done()
       })
@@ -30,7 +30,7 @@ describe('ComicBook', function () {
 
     it('should preload images in both directions')
 
-    it('should emit a preload:start event', function (done) {
+    it('should emit a preload:start event', done => {
       let comic = new ComicBook(srcs)
 
       comic.on('preload:start', () => done())
@@ -42,7 +42,7 @@ describe('ComicBook', function () {
 
     it('preload:ready should make sure that double page mode can show two images')
 
-    it('should show the load indicator on preload:start', function (done) {
+    it('should show the load indicator on preload:start', done => {
       let comic = new ComicBook(srcs)
       assert.equal(comic.loadIndicator.el.style.display, 'none')
       comic.loadIndicator.on('show', () => done())