Fix code style

Author: tshemsedinov

JavaScript/6-listener.js

@@ -8,7 +8,7 @@ const iterate = (array, listener) => {
 
 const cities = ['Kiev', 'London', 'Beijing'];
 
-const print = city => {
+const print = (city) => {
   console.log('City:', city);
 };
 

JavaScript/7-listener-timer.js

@@ -11,6 +11,6 @@ const iterate = (array, listener) => {
 
 const cities = ['Kiev', 'London', 'Beijing'];
 
-const print = city => console.log('Next city:', city);
+const print = (city) => console.log('Next city:', city);
 
 iterate(cities, print);

JavaScript/8-event.js

@@ -1,8 +1,8 @@
 'use strict';
 
-const adder = initial => {
+const adder = (initial) => {
   let value = initial;
-  const add = delta => {
+  const add = (delta) => {
     value += delta;
     if (value >= add.maxValue) add.maxEvent(value);
     return add;
@@ -17,7 +17,7 @@ const adder = initial => {
 
 // Usage
 
-const maxReached = value => {
+const maxReached = (value) => {
   console.log('max value reached, value: ' + value);
 };
 

JavaScript/9-event-emitter.js

@@ -4,11 +4,11 @@ const { EventEmitter } = require('events');
 
 const emitter = new EventEmitter();
 
-emitter.on('new city', city => {
+emitter.on('new city', (city) => {
   console.log('Emitted city:', city);
 });
 
-emitter.on('data', array => {
+emitter.on('data', (array) => {
   console.log(array.reduce((a, b) => a + b));
 });
 

JavaScript/a-deferred.js

@@ -13,15 +13,15 @@ class Deferred {
     this.value = value;
     this.finished = true;
     const event = this.events['done'];
-    if (event) event.forEach(fn => fn(value));
+    if (event) event.forEach((fn) => fn(value));
   }
 
   reject(err) {
     if (this.finished) return;
     this.error = err;
     this.finished = true;
     const event = this.events['fail'];
-    if (event) event.forEach(fn => fn(err));
+    if (event) event.forEach((fn) => fn(err));
   }
 
   done(fn) {
@@ -44,10 +44,10 @@ class Deferred {
 // Usage
 
 const conferences = new Deferred()
-  .done(list => {
+  .done((list) => {
     console.log(list);
   })
-  .fail(err => {
+  .fail((err) => {
     throw err;
   });
 

JavaScript/b-errors.js

@@ -2,8 +2,8 @@
 
 // Implementation
 
-const adder = value => {
-  const add = a => {
+const adder = (value) => {
+  const add = (a) => {
     value += a;
     if (value >= add.maxValue) {
       setImmediate(() => {