Add examples

tshemsedinov · tshemsedinov · commit 0326a03d95d0 · 2017-09-11T04:10:08.000+03:00
diff --git a/JavaScript/1-console.js b/JavaScript/1-console.js
@@ -0,0 +1,43 @@
+'use strict';
+
+console.log('log');
+
+const obj = {
+  name: 'Marcus Aurelius',
+  city: 'Roma',
+  born: 121,
+  children: [
+    {
+      name: 'Vibia Aurelia Sabina',
+      city: 'Sirmium',
+      born: 170,
+    },
+    {
+      name: 'Annia Cornificia Faustina Minor',
+      city: 'Roma',
+      born: 160,
+    }
+  ]
+};
+
+Object.defineProperty(obj, 'childCount', {
+  enumerable: false,
+  writable: false,
+  value: 13
+});
+
+console.log({ obj });
+
+console.dir({ obj });
+console.dir({ obj }, { showHidden: true, depth: 20, colors: true });
+
+console.error('Error');
+
+console.time('Loop time');
+const arr = [];
+for (let i = 0; i < 10000; i++) {
+  arr.push(i);
+}
+console.timeEnd('Loop time');
+
+console.trace('Treace here');
diff --git a/JavaScript/2-readline.js b/JavaScript/2-readline.js
@@ -0,0 +1,13 @@
+'use strict';
+
+const readline = require('readline');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+});
+
+rl.question('Enter your name: ', (name) => {
+  console.log(`Hello ${name} !`);
+  rl.close();
+});
diff --git a/JavaScript/3-prompt.js b/JavaScript/3-prompt.js
@@ -0,0 +1,34 @@
+'use strict';
+
+const readline = require('readline');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+  prompt: '> '
+});
+
+rl.prompt();
+
+const commands = {
+  help() {
+    console.log('Commands: ' + Object.keys(commands).join(', '));
+  },
+  hello() {
+    console.log('Hello there!');
+  },
+  exit() {
+    rl.close();
+  }
+};
+
+rl.on('line', (line) => {
+  line = line.trim();
+  const command = commands[line];
+  if (command) command();
+  else console.log('Unknown command');
+  rl.prompt();
+}).on('close', () => {
+  console.log('Bye!');
+  process.exit(0);
+});
diff --git a/JavaScript/4-cli.js b/JavaScript/4-cli.js
@@ -0,0 +1,22 @@
+'use strict';
+
+console.dir({
+  currentDirectory: process.cwd(),
+  processId: process.pid,
+  platform: process.platform,
+  release: process.release,
+  title: process.title,
+  nodeVersion: process.version,
+  versions: process.versions,
+});
+
+console.log('\nCommand line parameters:');
+process.argv.forEach((value, index) => {
+  console.log(`${index}: ${value}`);
+});
+
+console.log('\nEnvironment variables:');
+for (const name in process.env) {
+  const value = process.env[name];
+  console.log(`${name}: ${value}`);
+}
