Adds examples for readline related utility functions;

Signed-off-by: hegdeashwin <ashwin.hegde3@gmail.com>

Author: hegdeashwin

Kit/Session-5/readline/readline-1.js

@@ -0,0 +1,21 @@
+/***
+ * The goal of this file is to know about the readline functions;
+ *
+ *
+ * How to run this example:
+ * 1. node readline-1.js
+ * 2. See the message get displayed on prompt.
+ */
+
+var readline = require('readline');
+
+var rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout
+});
+
+rl.question("What do you think of Node.js ? ", function(answer) {
+	console.log("Thank you for your valuable feedback.", answer);
+
+	rl.close();
+});

Kit/Session-5/readline/readline-2.js

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+/***
+ * The goal of this file is to know about the readline functions;
+ *
+ *
+ * How to run this example:
+ * 1. node readline-2.js
+ * 2. See the message get displayed on prompt.
+ */
+
+var readline = require('readline');
+
+var rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout,
+	completer: completer
+});
+
+rl.question("What do you think of Node.js ? ", function(answer) {
+	console.log("Thank you for your valuable feedback.", answer);
+
+	rl.close();
+});
+
+function completer(line) {
+	var completions = 'excellent good bad'.split(' ');
+	var hits = completions.filter(function(c) {
+		return c.indexOf(line) == 0;
+	});
+
+	return [hits.length ? hits : completions, line];
+}

Kit/Session-5/readline/readline-3.js

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+/***
+ * The goal of this file is to know about the readline functions;
+ *
+ *
+ * How to run this example:
+ * 1. node readline-3.js
+ * 2. See the message get displayed on prompt.
+ */
+
+var readline = require('readline');
+
+var rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout
+});
+
+rl.on('line', function(cmd) {
+	console.log('You just typed: ' + cmd);
+});
+
+rl.on('pause', function() {
+	console.log('Readline paused');
+});
+
+rl.on('resume', function() {
+	console.log('Readline resumed');
+});
+
+rl.on('close', function() {
+	console.log('Readline closed');
+});
+
+rl.on('SIGINT', function() {
+	rl.question('Are you sure you want to exit? ', function(answer) {
+		if(answer.match(/^y(es)?$/i)) {
+			rl.pause();
+		}
+	});
+});

Kit/Session-5/readline/readline-4.js

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+/***
+ * The goal of this file is to know about the readline functions;
+ *
+ *
+ * How to run this example:
+ * 1. node readline-4.js
+ * 2. See the message get displayed on prompt.
+ */
+
+var readline = require('readline');
+
+var rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout
+});
+
+rl.setPrompt('>> ');
+rl.prompt();
+
+rl.on('line', function(line) {
+
+	switch (line.trim()) {
+		case 'hi':
+			console.log('world!');
+			break;
+
+		default:
+			console.log('Say what? I might have heard `' + line.trim() + '`');
+			break;
+	}
+	rl.prompt();
+}).on('close', function() {
+	console.log('Have a great day!');
+	process.exit(0);
+});

Kit/Session-5/readline/readline-5.js

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+/***
+ * The goal of this file is to know about the readline functions;
+ *
+ *
+ * How to run this example:
+ * 1. node readline-5.js
+ * 2. See the message get displayed on prompt.
+ */
+
+var readline = require('readline');
+
+var rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout
+});
+
+readline.cursorTo(process.stdin, 20, 20);
+readline.clearLine(process.stdin, 0);
+
+rl.close();