Refactor single argument lambdas

Author: tshemsedinov

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 events = require('events');
 
 const emitter = new events.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

@@ -17,7 +17,7 @@ const conferences = getConferences();
 
 console.log(conferences);
 
-conferences.data((list) => {
+conferences.data(list => {
   console.log(list);
 });
 

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(() => {