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Chapter 2: standard and review edits

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Beth Griggs 2020-05-18 21:34:02 +01:00
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15 changed files with 115 additions and 119 deletions
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14
Chapter02/communicating-with-sockets/client.js
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@ -1,12 +1,12 @@
const net = require('net');
const net = require('net')
const HOSTNAME = 'localhost';
const PORT = 3000;
const HOSTNAME = 'localhost'
const PORT = 3000
const socket = net.connect(PORT, HOSTNAME);
const socket = net.connect(PORT, HOSTNAME)
socket.write('World');
socket.write('World')
socket.on('data', (data) => {
console.log(data.toString());
});
console.log(data.toString())
})

17
Chapter02/communicating-with-sockets/server.js
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@ -1,13 +1,12 @@
const net = require('net');
const net = require('net')
const HOSTNAME = 'localhost';
const PORT = 3000;
const HOSTNAME = 'localhost'
const PORT = 3000
net.createServer((socket) => {
console.log('Client connected.');
console.log('Client connected.')
socket.on('data', name => {
socket.write(`Hello ${name}!`);
});
}).listen(PORT, HOSTNAME);
socket.on('data', name => {
socket.write(`Hello ${name}!`)
})
}).listen(PORT, HOSTNAME)

8
Chapter02/fetching-metadata/chmod-octal.js
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@ -1,6 +1,4 @@
'use strict'
const fs = require('fs')
const file = './file.txt'
const fs = require('fs');
const file = './file.txt';
fs.chmodSync("./file.txt", 0o664);
fs.chmodSync(file, 0o664)

14
Chapter02/fetching-metadata/chmod.js
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@ -1,9 +1,7 @@
'use strict'
const fs = require('fs')
const file = './file.txt'
const fs = require('fs');
const file = './file.txt';
fs.chmodSync("./file.txt",
fs.constants.S_IRUSR | fs.constants.S_IWUSR |
fs.constants.S_IRGRP | fs.constants.S_IWGRP |
fs.constants.S_IROTH);
fs.chmodSync(file,
fs.constants.S_IRUSR | fs.constants.S_IWUSR |
fs.constants.S_IRGRP | fs.constants.S_IWGRP |
fs.constants.S_IROTH)

14
Chapter02/fetching-metadata/metadata.js
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@ -1,9 +1,9 @@
const fs = require('fs');
const file = process.argv[2];
const fs = require('fs')
const file = process.argv[2]
function printMetadata(file) {
const fileStats = fs.statSync(file);
console.log(fileStats);
};
function printMetadata (file) {
const fileStats = fs.statSync(file)
console.log(fileStats)
}
printMetadata(file);
printMetadata(file)

22
Chapter02/fetching-metadata/metadata2.js
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@ -1,13 +1,13 @@
const fs = require('fs');
const file = process.argv[2];
const fs = require('fs')
const file = process.argv[2]
function printMetadata(file) {
try {
const fileStats = fs.statSync(file);
console.log(fileStats);
} catch (err) {
console.error("Error reading file path:", file);
}
};
function printMetadata (file) {
try {
const fileStats = fs.statSync(file)
console.log(fileStats)
} catch (err) {
console.error('Error reading file path:', file)
}
}
printMetadata(file);
printMetadata(file)

8
Chapter02/file-watching/watch.js
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@ -1,6 +1,6 @@
const fs = require('fs');
const file = './file.txt';
const fs = require('fs')
const file = './file.txt'
fs.watchFile(file, (current, previous) => {
return console.log(`${file} updated ${time}`)
});
return console.log(`${file} updated ${time}`)
})

12
Chapter02/file-watching/watch2.js
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@ -1,8 +1,8 @@
const fs = require('fs');
const file = './file.txt';
const moment = require('moment');
const fs = require('fs')
const file = './file.txt'
const moment = require('moment')
fs.watch(file, (eventType, filename) => {
const time = moment().format('MMMM Do YYYY, h:mm:ss a');
return console.log(`${filename} updated ${time}`)
});
const time = moment().format('MMMM Do YYYY, h:mm:ss a')
return console.log(`${filename} updated ${time}`)
})

8
Chapter02/interfacing-with-io/greeting.js
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@ -1,4 +1,4 @@
process.stdin.on('data', (data) => {
let name = data.toString().trim().toUpperCase();
process.stdout.write(`Hello ${name}!`);
});
process.stdin.on('data', data => {
const name = data.toString().trim().toUpperCase()
process.stdout.write(`Hello ${name}!`)
})

14
Chapter02/interfacing-with-io/greeting2.js
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@ -1,8 +1,8 @@
process.stdin.on('data', data => {
let name = data.toString().trim().toUpperCase();
if (name != '') {
process.stdout.write(`Hello ${name}!`);
} else {
process.stderr.write('Input was empty.');
}
});
const name = data.toString().trim().toUpperCase()
if (name !== '') {
process.stdout.write(`Hello ${name}!`)
} else {
process.stderr.write('Input was empty.')
}
})

6
Chapter02/working-with-files/callback-hell.js
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@ -1,5 +1,5 @@
first(args, function () {
second(args, function () {
third(args, function () {})
})
second(args, function () {
third(args, function () {})
})
})

24
Chapter02/working-with-files/readWriteAsync.js
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@ -1,16 +1,16 @@
const fs = require('fs');
const fs = require('fs')
const path = require('path')
const filepath = path.join(process.cwd(), 'hello.txt');
const filepath = path.join(process.cwd(), 'hello.txt')
fs.readFile(filepath, 'utf8', function (err, contents) {
if (err) {
return console.log(err);
}
console.log("File Contents:", contents);
contents = contents.toUpperCase();
fs.writeFile(filepath, contents, function (err) {
if (err) throw err;
console.log("File updated.")
});
});
if (err) {
return console.log(err)
}
console.log('File Contents:', contents)
const upperContents = contents.toUpperCase()
fs.writeFile(filepath, upperContents, function (err) {
if (err) throw err
console.log('File updated.')
})
})

30
Chapter02/working-with-files/readWriteAsync2.js
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@ -1,20 +1,22 @@
const fs = require('fs');
const fs = require('fs')
const path = require('path')
const filepath = path.join(process.cwd(), 'hello.txt');
const filepath = path.join(process.cwd(), 'hello.txt')
fs.readFile(filepath, 'utf8', function (err, contents) {
if (err) {
return console.log(err);
}
console.log("File Contents:", contents);
contents = contents.toUpperCase();
updateFile(filepath, contents);
});
if (err) {
return console.log(err)
}
console.log('File Contents:', contents)
const upperContents = contents.toUpperCase()
setTimeout(() => updateFile(filepath, upperContents), 10)
})
function updateFile(filepath, contents) {
fs.writeFile(filepath, contents, function (err) {
if (err) throw err;
console.log("File updated.");
});
};
fs.writeFile(filepath, contents, function (err) {
if (err) throw err
console.log('File updated.')
})
}
setInterval(() => process.stdout.write('**** \n'), 1).unref()

24
Chapter02/working-with-files/readWritePromise.js
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@ -1,15 +1,15 @@
const fs = require("fs").promises;
const path = require('path');
const fs = require('fs').promises
const path = require('path')
const filepath = path.join(process.cwd(), 'hello.txt');
const filepath = path.join(process.cwd(), 'hello.txt')
async function run() {
try {
const contents = await fs.readFile(filepath, 'utf8');
console.log("File Contents:", contents);
} catch (error) {
console.error(error);
}
};
async function run () {
try {
const contents = await fs.readFile(filepath, 'utf8')
console.log('File Contents:', contents)
} catch (error) {
console.error(error)
}
}
run();
run()

17
Chapter02/working-with-files/readWriteSync.js
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@ -1,12 +1,11 @@
const fs = require('fs');
const path = require('path');
const fs = require('fs')
const path = require('path')
const filepath = path.join(process.cwd(), 'hello.txt');
const filepath = path.join(process.cwd(), 'hello.txt')
let contents = fs.readFileSync(filepath, 'utf8');
console.log("File Contents:", contents);
const contents = fs.readFileSync(filepath, 'utf8')
console.log('File Contents:', contents)
contents = contents.toString().toUpperCase();
fs.writeFileSync(filepath, contents);
console.log("File updated.");
const upperContents = contents.toUpperCase()
fs.writeFileSync(filepath, upperContents)
console.log('File updated.')