Merge pull request #2 from Saif-Shines/master

New folder of codes for each lesson of play list!

Author: Shaun

Each lesson Codes

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+

Practice/#1 code of the play list.js

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+console.log("Hello Saif, You are learning Node.js!");
+
+setTimeout(function(){
+    console.log("Three seconds \n have passed!");
+
+},3000);

Practice/#10 File Read and Write/app.js

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+//Generally the module name and the variable name both are same
+var fs = require('fs');
+
+// fs.readFileSync
+// Sync' part allows the node to read the file synchronusly meaning all file is read first before going through other code. 
+var sample = fs.readFileSync('sample.txt','utf8');
+// utf8 is encoding format| you can find clean explanation here at http://stackoverflow.com/a/15128103/5388823 
+console.log(sample);
+
+// this line of code creates an another file output.txt and writes the data in sample into the log.
+fs.writeFileSync('output.txt',sample);

Practice/#10 File Read and Write/sample.txt

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+Here goes the content of your file.

Practice/#11 Asyc/app.js

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+var fs = require('fs');
+
+var file = fs.readFile('input.txt','utf8',function(err,data){
+    fs.writeFile('writeme.txt',data);
+    console.log(data);
+});
+
+console.log('This is an instruction outside the sync file system.');

Practice/#11 Asyc/input.txt

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+This is file to read Synchonusly.

Practice/#2 callfunction.js

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+function callFunction(fun){
+ fun();
+}
+
+var tata = function(){
+    console.log('bye');
+}
+
+callFunction(tata);

Practice/#3 dirname.js

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+// node can also determine the your directory by using '__dirname';
+
+console.log(__dirname);
+console.log(__filename);

Practice/#4 event.js

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+var events = require('events');
+
+var myEmmitter = new events.EventEmitter();
+
+myEmmitter.on('anEvent',function(msg){
+    console.log(msg);
+});
+
+myEmmitter.emit('anEvent','The event is absolutely emmited');

Practice/#5 getmodule.js

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+// This is the module getting function. it gets its module from moduleexp.js
+
+var stuff = require('./moduleexp.js');// | ./ | is used to search in present directory.
+
+
+// look here at the counter part, it is actually taking the arguments. and doing everything.
+// We need to intialise the 'counter variable first.'
+console.log(stuff.counter(['Hello','This is','Saif']));
+console.log(stuff.adder(5,6));
+console.log(stuff.bi);
+console.log(stuff.adder(stuff.bi,44));

Practice/#6 moduleexp.js

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+
+// This file is completely a module for getmodule.js file.
+
+
+// a function expression is made here.
+var counter = function(arry){
+    return 'The number of '+arry.length + '\n done!';
+};
+// Adding more modules
+var adder = function(a,b){
+    return 'On adding the two number it gives'+(a+b);
+}
+
+var pi = 3.1535;
+
+// module.exports is the important part, it makes the counter available for other modules!
+module.exports.counter = counter ;
+module.exports.adder = adder;
+module.exports.bi = pi;

Practice/#7 num 3.js

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+
+// General Method for writing a function!
+function write(){
+    console.log('Woah! I just Invoked a function');
+}
+write();
+
+// Writing a funcion expression
+
+var sayBye = function(){
+    console.log('I just called a funcion expression,!');
+}
+
+sayBye();

Practice/#8 setInterval.js

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+var time = 0;
+var timer = setInterval(function(){
+    console.log(time+ ' seconds have passed');
+    time += 2;
+    if(time > 8){
+        clearInterval(timer);
+    }
+},2000);

Practice/#9 util.js

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+// Adding the required Modules
+
+var events = require('events');
+var util = require('util');
+// creating a function Person
+
+var Person = function(name){
+// this allows, the function with any object created(james,saif,sampath) to utilise this function
+    this.name = name;
+}
+
+// From the module util, we are inheriting the from events.EventEmitter
+util.inherits(Person,events.EventEmitter);
+//randomly 3 objects storing in 3 variables
+var james = new Person('james');
+var saif = new Person('saif');
+var sampath = new Person('sampath');
+
+var People = [james,saif,sampath];
+
+People.forEach(function(Person){
+    Person.on('speak',function(msg){
+        console.log(Person.name + 'said this ' + msg );
+    });
+});
+
+james.emit('speak','This is james');
+saif.emit('speak','OH great nice to meet you Mer. ');
+sampath.emit('speak','Thats cool');

README.md

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+# node-js-playlist
+CSS and asset files for the Net Ninja YouTube nodejs playlist
+
+The final project code can be found in the public/assests folder of this repo
+
+If you have been following the tutorial, code for each and every lesson is added in the Practice folder so you can directly download and check.
+All files have been tested.
+
+If more files for  .\Practice\ should be added. They will be added very soon.