Update code style: arrow-parens

Author: tshemsedinov

JavaScript/2-promise.js

@@ -2,7 +2,7 @@
 
 // Pending
 
-const promise1 = new Promise(resolve => {
+const promise1 = new Promise((resolve) => {
   setTimeout(() => {
     resolve('value1');
   }, 0);
@@ -12,7 +12,7 @@ promise1.then(console.log); // 'value1' (delayed)
 
 // Immediate resolve
 
-const promise2 = new Promise(resolve => resolve('value2'));
+const promise2 = new Promise((resolve) => resolve('value2'));
 console.dir({ promise2 }); // Promise { 'value2' }
 promise2.then(console.log); // 'value2'
 
@@ -48,14 +48,14 @@ const readFile = (filename, encoding) =>
     }));
 
 readFile('file1.txt', 'utf8')
-  .then(data => {
+  .then((data) => {
     console.log(data);
     return readFile('file2.txt', 'utf8');
   })
-  .then(data => {
+  .then((data) => {
     console.log(data);
     return readFile('file3.txt', 'utf8');
   })
-  .then(data => {
+  .then((data) => {
     console.log(data);
   });

JavaScript/3-promisify.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const promisify = fn => (...args) => new Promise((resolve, reject) => {
+const promisify = (fn) => (...args) => new Promise((resolve, reject) => {
   args.push((err, result) => {
     if (err) reject(err);
     else resolve(result);
@@ -13,18 +13,18 @@ const fs = require('fs');
 const readFile1 = promisify(fs.readFile);
 
 readFile1('file1.txt', 'utf8')
-  .then(data => {
+  .then((data) => {
     console.log(data.toString());
     return readFile1('file2.txt', 'utf8');
   })
-  .then(data => {
+  .then((data) => {
     console.log(data.toString());
     return readFile1('file3.txt', 'utf8');
   })
-  .then(data => {
+  .then((data) => {
     console.log(data.toString());
   })
-  .catch(err => {
+  .catch((err) => {
     console.log(err);
   });
 
@@ -33,17 +33,17 @@ const util = require('util');
 const readFile2 = util.promisify(fs.readFile);
 
 readFile2('file1.txt', 'utf8')
-  .then(data => {
+  .then((data) => {
     console.log(data.toString());
     return readFile2('file2.txt', 'utf8');
   })
-  .then(data => {
+  .then((data) => {
     console.log(data.toString());
     return readFile2('file3.txt', 'utf8');
   })
-  .then(data => {
+  .then((data) => {
     console.log(data.toString());
   })
-  .catch(err => {
+  .catch((err) => {
     console.log(err);
   });

JavaScript/4-catch.js

@@ -2,37 +2,37 @@
 
 const fs = require('fs');
 
-const readTextFile = filename => fs.promises.readFile(filename, 'utf8');
+const readTextFile = (filename) => fs.promises.readFile(filename, 'utf8');
 
 readTextFile('file1-.txt')
   .then(
-    data => {
+    (data) => {
       console.dir({ file1: data });
       return readTextFile('file2.txt');
     },
-    reason => {
+    (reason) => {
       console.log('Cannot read file1.txt --- A');
       console.log(reason);
     }
   )
   .catch(
-    reason => {
+    (reason) => {
       console.log('Cannot read file1.txt --- B');
       console.log(reason);
     }
   )
-  .then(data => {
+  .then((data) => {
     console.dir({ file2: data });
     return readTextFile('file3.txt');
   })
-  .catch(reason => {
+  .catch((reason) => {
     console.log('Cannot read file2.txt');
     console.log(reason);
   })
-  .then(data => {
+  .then((data) => {
     console.dir({ file3: data });
   })
-  .catch(reason => {
+  .catch((reason) => {
     console.log('Cannot read file');
     console.log(reason);
   });

JavaScript/5-finally.js

@@ -2,13 +2,13 @@
 
 const fs = require('fs');
 
-const readTextFile = filename => fs.promises.readFile(filename, 'utf8');
+const readTextFile = (filename) => fs.promises.readFile(filename, 'utf8');
 
 readTextFile('file1-.txt')
-  .then(data => {
+  .then((data) => {
     console.dir({ file1: data });
   })
-  .catch(reason => {
+  .catch((reason) => {
     console.log('Cannot read file1.txt');
     console.log(reason);
   })

JavaScript/6-fetch.js

@@ -2,8 +2,8 @@
 
 const http = require('http');
 
-const fetch = url => new Promise((resolve, reject) => {
-  http.get(url, res => {
+const fetch = (url) => new Promise((resolve, reject) => {
+  http.get(url, (res) => {
     const code = res.statusCode;
     if (code !== 200) {
       return reject(new Error(`HTTP status code ${code}`));
@@ -12,7 +12,7 @@ const fetch = url => new Promise((resolve, reject) => {
     res.on('error', reject);
 
     const chunks = [];
-    res.on('data', chunk => {
+    res.on('data', (chunk) => {
       chunks.push(chunk);
     });
 

JavaScript/7-http.js

@@ -3,9 +3,9 @@
 const fetch = require('./6-fetch.js');
 
 fetch('http://localhost:3000/person')
-  .then(data => {
+  .then((data) => {
     console.log(data);
   })
-  .catch(err => {
+  .catch((err) => {
     console.error(err);
   });

JavaScript/8-all.js

@@ -11,9 +11,9 @@ const promises = [
 ];
 
 Promise.all(promises)
-  .then(values => {
+  .then((values) => {
     console.log(values);
   })
-  .catch(err => {
+  .catch((err) => {
     console.log(err);
   });

JavaScript/9-race.js

@@ -11,9 +11,9 @@ const promises = [
 ];
 
 Promise.race(promises)
-  .then(res => {
+  .then((res) => {
     console.log(res);
   })
-  .catch(err => {
+  .catch((err) => {
     console.log(err);
   });

JavaScript/a-thenable.js

@@ -19,7 +19,7 @@ class Thenable {
     if (fn) {
       const next = fn(value);
       if (next) {
-        next.then(value => {
+        next.then((value) => {
           this.next.resolve(value);
         });
       }
@@ -29,7 +29,7 @@ class Thenable {
 
 // Usage
 
-const readFile = filename => {
+const readFile = (filename) => {
   const thenable = new Thenable();
   fs.readFile(filename, 'utf8', (err, data) => {
     if (err) throw err;
@@ -39,14 +39,14 @@ const readFile = filename => {
 };
 
 readFile('file1.txt')
-  .then(data => {
+  .then((data) => {
     console.dir({ file1: data });
     return readFile('file2.txt');
   })
-  .then(data => {
+  .then((data) => {
     console.dir({ file2: data });
     return readFile('file3.txt');
   })
-  .then(data => {
+  .then((data) => {
     console.dir({ file3: data });
   });

JavaScript/b-expirable.js

@@ -5,11 +5,11 @@ const PROMISE_TIMEOUT = 1000;
 class Expirable {
   constructor(executor) {
     const promise = new Promise((resolve, reject) => {
-      executor(val => {
+      executor((val) => {
         if (this.expired) return;
         clearTimeout(this.timer);
         resolve(val);
-      }, err => {
+      }, (err) => {
         if (this.expired) return;
         clearTimeout(this.timer);
         reject(err);
@@ -28,42 +28,42 @@ class Expirable {
 
 // Usage
 
-new Expirable(resolve => {
+new Expirable((resolve) => {
   setTimeout(() => {
     resolve('Resolved before timeout');
   }, 100);
-}).then(data => {
+}).then((data) => {
   console.dir({ data });
-}).catch(error => {
+}).catch((error) => {
   console.dir({ error: error.message });
 });
 
 new Expirable((resolve, reject) => {
   setTimeout(() => {
     reject(new Error('Something went wrong'));
   }, 100);
-}).then(data => {
+}).then((data) => {
   console.dir({ data });
-}).catch(error => {
+}).catch((error) => {
   console.dir({ error: error.message });
 });
 
-new Expirable(resolve => {
+new Expirable((resolve) => {
   setTimeout(() => {
     resolve('Never resolved before timeout');
   }, 2000);
-}).then(data => {
+}).then((data) => {
   console.dir({ data });
-}).catch(error => {
+}).catch((error) => {
   console.dir({ error: error.message });
 });
 
 new Expirable((resolve, reject) => {
   setTimeout(() => {
     reject(new Error('Never rejected before timeout'));
   }, 2000);
-}).then(data => {
+}).then((data) => {
   console.dir({ data });
-}).catch(error => {
+}).catch((error) => {
   console.dir({ error: error.message });
 });

JavaScript/server.js

@@ -40,7 +40,7 @@ const server = http.createServer((req, res) => {
     return;
   }
 
-  handler(req, result => {
+  handler(req, (result) => {
     const json = JSON.stringify(result);
     res.writeHead(200, { 'Content-Type': 'application/json' });
     res.end(json);