Node.js Tutorial for Beginners

Node.js Tutorial for beginners - Learn Node.js framework in simple and easy steps starting from basic to advanced concepts with examples including Introduction, Environment Setup, Node Package Manager, Node Callbacks Concept, Node Buffers Module, Node Streams, Node File System, Node Utility Modules, Node Web Module, Node Express Application, Node RESTFul API, Node Scaling Application. 

Node.js Tutorial for Beginners 1 - Node.js Introduction
Node.js Tutorial for Beginners 2 - How to Install Node.js with NPM on Windows
Node.js Tutorial for Beginners 3 - How to Install Node.js with NPM on Ubuntu Linux
How to install Visual Studio Code on Windows
Node.js Tutorial for Beginners 4 - Run First NodeJs Web Server
Cmder : A Better Command Prompt Tool for Windows
Node.js Tutorial for Beginners 5 - Node.js debugger
Node.js Tutorial for Beginners 6 - Node.js Docs and The Global Object
Node.js Tutorial for Beginners 7 - Creating Custom Modules in Nodejs
How to install Atom editor in Ubuntu Linux
Node.js Tutorial for Beginners 8 - Reading and Writing Files using fs module
Node.js Tutorial for Beginners 9 - Creating and Removing Directories using fs module
Node.js Tutorial for Beginners 10 - Node.js Events and EventEmitter
Node.js Tutorial for Beginners 11 - Basics of Streams - Readable Stream
Node.js Tutorial for Beginners 12 - Basics of Streams - Writable Streams
Node.js Tutorial for Beginners 13 - pipes
Node.js Tutorial for Beginners 14 - Using node.js for serving HTML page
Node.js Tutorial for Beginners 15 - Using node.js for serving JSON Data
Node.js Tutorial for Beginners 16 - Basic Routing with node
Node.js Tutorial for Beginners 17 - Node Package Manager (npm)
Node.js Tutorial for Beginners 18 - npm init & package.json File
Node.js Tutorial for Beginners 19 - Installing npm packages globally + install nodemon
How to install Visual Studio Code on Ubuntu Linux
Node.js Tutorial for Beginners 20 - Introduction to Express.js
Node.js Tutorial for Beginners 21 - Express.js route parameter
Node.js Tutorial for Beginners 22 - Node.js template engine EJS in Express
Node.js Tutorial for Beginners 23 - using JavaScript with EJS

Shell Scripting Tutorial for Beginners

A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. A shell usually interprets a single line of input, but we can also create a file containing a number of lines of commands to be interpreted. This file is a program known as a shell script. The program can also contain control structures (if-then, loops). Shell scripts allow a sequence of commands to be executed automatically .
UNIX Operating System (OS) Tutorial for Beginners - Learn fundamentals of UNIX in simple and easy steps starting from basic to advanced concepts with examples including of Getting Started, Unix Korn and Bourne Shell and Programming, File Permission / Access Modes, Environment, Utilities, Pipes and Filters, Network Communication Utilities, File System, Directories, Memory Management, Special Variables, vi editor, What is Shell?, Using Shell Variables, Arrays, Basic Operators, Decision Making, Loop Types, Control, Substitution, Quoting Mechanisms, Input / Output Redirections, Functions, Man Page Help, Regular Expressions with SED, User Administration, System Performance, Logging, Signals and Traps, Processes.

Shell Scripting Tutorial for Beginners 3 - Read User Input - Learn Online

Read command - The read command allows you to prompt for input and store it in a variable. shell allows to prompt for user input.
Syntax:
read varname [more vars]
or
read –p "prompt" varname [more vars]

words entered by user are assigned to varname and “more vars”
last variable gets rest of input line.

Make 5000 Facebook Facebook Friends in Just One Day without Block

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Make 5000 Facebook Friends in Just One Day

Many scammers and blog claim that they increase your facebook friend list but they can't. Here In this article you never worried about scam or spam. This method is fully tested and safe for all facebook user. Facebook never block you on Facebook If you follow this article. In this Application user got list of emails and send invites through this list. Make 5000 Facebook Friends in Just One Day

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Introduction to Google Advertising ID and fast integration to Apk and use

 

Advertising ID (Ad ID)
The ad id is a user-specific, unique, re-settable ad id, provided by the Google Play Service, which gives users better control for developers to provide a simple, standard system to continue using your application for The anonymous identifier for the purpose of the ad and either reset the tag or exit the benefit-based Google Play medical program.
The ad ID can be implemented in your application through a simple API.


Focus on development functions
Standard and Simple - Advertising logo is a standard part for analysis of advertising and simple systems .
Let the user control - the user can set their ID at any time or exit those interest-based ads from Google's app, and their preferences apply to the advertising agency's advertising ID.


Start
Get the Google Play Service SDK - download the google-play-service.jar from the downloaded Android SDK's Extras directory
Read the documentation and examples - document examples


Annotations
As a reminder , please note that from 2014-08-01 , the new application and application updates via Google activity must be used in any ad identifier for any advertising purposes instead of using ads on the ad ID device
How to check your application's compliance through the development console, or in the details of the relevant development policy changes, see the Google Game Developer Help Center Advertising ID Reference

Use the ad ID
The ad ID is a unique but user-reset string identifier that allows online advertising and other applications to anonymously identify a user. The user's advertising ID is provided through the API for the service provided to the application in the Google Play Service.
Users can set their advertising ID at any time from Google to set the application's right on the device's advertising section. From the same application, the user can also select targeted ad IDs based on the ad to set the appropriate ad tracking preferences. When a user selects a targeted ad , this ad tracking preference is provided to the application via the Google Play Service API .
App use ads must respect and respect user habits and preferences tracking, and note that any application that uses ad ids must respect Google's development content policy terms.

ID format
The Google Play Service API exposes and the user ID is the UUID string format.

Need
The Ads ID API supports Google Play Service 4.0+ devices
Support for specific devices is based on the version of Google Paly Service that the device installs

The user's ad ID and ad tracking are given priority
If your app wants to use an ad ID, your device must have Google Play Service installed
The API for the ad ID is available in the com.google.android.gms.ads.identifier package in the Google Play Service library. Get the user's ad ID and tracking preferences , call the method getadvertisingidinfo () , which returns an advertisingidclient information package . User current ad ID and tracking preferences .
Getadvertisingidinfo () method of blocking calls, so you can not say it in the main thread (UI thread). If the main thread , the method throws an exceptionstateexception exception .
Once you retrieve the advertisingidclient object , you can use its getid () and islimitadtrackingenabled () methods to access the ad ID and ad tracking preferences .

Method	Description
public String getId()	Retrieves the advertising ID.
public boolean isLimitAdTrackingEnabled()	Retrieve whether the user has limit ad tracking enabled or not.

The ad ID API does not include a "reset" method. Only users can start resetting their own ad ID in the Google Play Service settings .

Example 1:

Get ID to be placed in the sub-thread, this approach is to put google-play-service.jar on the project under the lib, the whole jar about more than 3M, there is no need to integrate jar way to see example two.

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import com.google.android.gms.ads.identifier.AdvertisingIdClient; import com.google.android.gms.ads.identifier.AdvertisingIdClient.Info; import com.google.android.gms.common.GooglePlayServicesAvailabilityException; import com.google.android.gms.common.GooglePlayServicesNotAvailableException; import java.io.IOException; ... // Do not call this function from the main thread. Otherwise, // an IllegalStateException will be thrown. public void getIdThread() { Info adInfo = null; try { adInfo = AdvertisingIdClient.getAdvertisingIdInfo(mContext); } catch (IOException e) { // Unrecoverable error connecting to Google Play services (e.g., // the old version of the service doesn't support getting AdvertisingId). } catch (GooglePlayServicesAvailabilityException e) { // Encountered a recoverable error connecting to Google Play services. } catch (GooglePlayServicesNotAvailableException e) { // Google Play services is not available entirely. } final String id = adInfo.getId(); final boolean isLAT = adInfo.isLimitAdTrackingEnabled(); }

Example 2:

Do not need to integrate google-play-service.jar how to get it?

This means that the phone itself installed Google Play Service, where the use of binding services and boast process communication to obtain advertising ID.

Create a class of AdvertisingIdClient.java

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public class AdvertisingIdClient { public static final class AdInfo { private final String advertisingId; private final boolean limitAdTrackingEnabled; AdInfo(String advertisingId, boolean limitAdTrackingEnabled) { this.advertisingId = advertisingId; this.limitAdTrackingEnabled = limitAdTrackingEnabled; } public String getId() { return this.advertisingId; } public boolean isLimitAdTrackingEnabled() { return this.limitAdTrackingEnabled; } } public static AdInfo getAdvertisingIdInfo(Context context) throws Exception { if (Looper.myLooper() == Looper.getMainLooper()) throw new IllegalStateException( "Cannot be called from the main thread"); try { PackageManager pm = context.getPackageManager(); pm.getPackageInfo("com.android.vending", 0); } catch (Exception e) { throw e; } AdvertisingConnection connection = new AdvertisingConnection(); Intent intent = new Intent( "com.google.android.gms.ads.identifier.service.START"); intent.setPackage("com.google.android.gms"); if (context.bindService(intent, connection, Context.BIND_AUTO_CREATE)) { try { AdvertisingInterface adInterface = new AdvertisingInterface( connection.getBinder()); AdInfo adInfo = new AdInfo(adInterface.getId(), adInterface.isLimitAdTrackingEnabled(true)); return adInfo; } catch (Exception exception) { throw exception; } finally { context.unbindService(connection); } } throw new IOException("Google Play connection failed"); } private static final class AdvertisingConnection implements ServiceConnection { boolean retrieved = false; private final LinkedBlockingQueue<IBinder> queue = new LinkedBlockingQueue<IBinder>( 1); public void onServiceConnected(ComponentName name, IBinder service) { try { this.queue.put(service); } catch (InterruptedException localInterruptedException) { } } public void onServiceDisconnected(ComponentName name) { } public IBinder getBinder() throws InterruptedException { if (this.retrieved) throw new IllegalStateException(); this.retrieved = true; return (IBinder) this.queue.take(); } } private static final class AdvertisingInterface implements IInterface { private IBinder binder; public AdvertisingInterface(IBinder pBinder) { binder = pBinder; } public IBinder asBinder() { return binder; } public String getId() throws RemoteException { Parcel data = Parcel.obtain(); Parcel reply = Parcel.obtain(); String id; try { data.writeInterfaceToken("com.google.android.gms.ads.identifier.internal.IAdvertisingIdService"); binder.transact(1, data, reply, 0); reply.readException(); id = reply.readString(); } finally { reply.recycle(); data.recycle(); } return id; } public boolean isLimitAdTrackingEnabled(boolean paramBoolean) throws RemoteException { Parcel data = Parcel.obtain(); Parcel reply = Parcel.obtain(); boolean limitAdTracking; try { data.writeInterfaceToken("com.google.android.gms.ads.identifier.internal.IAdvertisingIdService"); data.writeInt(paramBoolean ? 1 : 0); binder.transact(2, data, reply, 0); reply.readException(); limitAdTracking = 0 != reply.readInt(); } finally { reply.recycle(); data.recycle(); } return limitAdTracking; } } }

USE:

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new Thread(new Runnable() { public void run() { try { AdInfo adInfo = AdvertisingIdClient .getAdvertisingIdInfo(MainActivity.this); advertisingId = adInfo.getId(); optOutEnabled = adInfo.isLimitAdTrackingEnabled(); // Log.i("ABC", "advertisingId" + advertisingId); // Log.i("ABC", "optOutEnabled" + optOutEnabled); } catch (Exception e) { e.printStackTrace(); } mHandler.sendEmptyMessage(HANDEL_ADID); } }).start();

Shell Scripting Tutorial for Beginners 2 - using Variables and Comments - Learn Online

In Linux (Shell), there are two types of variable:
(1) System variables - Created and maintained by Linux itself. This type of variable defined in CAPITAL LETTERS.
(2) User defined variables (UDV) - Created and maintained by user. This type of variable defined in lower letters.

Shell variables
- var refers to the name, $var to the value
- t = 100 #Sets var t to value 100
- echo ”$t = $t” #will print: $t = 100
- Remove a variable with unset var
- Names begin with alpha characters and include alpha, numeric, or underscore

Shell Scripting Tutorial for Beginners 1 - Introduction - Learn Online

A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. A shell usually interprets a single line of input, but we can also create a file containing a number of lines of commands to be interpreted. This file is a program known as a shell script. The program can also contain control structures (if-then, loops). Shell scripts allow a sequence of commands to be executed automatically .