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Detailed instructions on getting CentOS 7 installation and basic set up for starting on. Download latest CentOS .ISO - https://www.centos.org/download/ After downloading the last version of CentOS using above links or using official CentOS download page. Burn it to a DVD or create a bootable USB...

Detailed instructions on getting twitter set up or installed.

call :tohex 14 result rem More code... :tohex <innum> <outvar> set dec=%1 set outvar=%~2 rem %n and %~n are functionally identical, but %~n is slightly safer. goto :eof This takes the additional parameters from the call as if the function was a separate Batch file. Note: the ...

set var1=123456789 set var2=abcdef call :specialvars echo %var1%, %var2% rem More code... :specialvars setlocal set var1=987654321 set var2=fedcba endlocal goto :eof When inside the section setlocal , endlocal section, variables are seperate from the caller's variables, hence why %var...

The DayNight theme gives an app the cool capability of switching color schemes based on the time of day and the device's last known location. Add the following to your styles.xml: <style name="AppTheme" parent="Theme.AppCompat.DayNight"> <!-- Customize your th...

For this demonstration we will use service broker construction created in another part of this documentation. Mentioned part is called 3. Create basic service broker construction on database (single database communication). First we need to create a procedure that is able to read and process data f...

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To illustrate how to use regr_slope(Y,X), I applied it to a real world problem. In Java, if you don't clean up memory properly, the garbage can get stuck and fill up the memory. You dump statistics every hour about memory utilization of different classes and load it into a postgres database for anal...

Content Negotiation can be defined as the process of selecting best representation for a given resource. So Content negotiation means the client and server can negotiate between them so that client can get data according to their required format. There are three points on which internet depends, ...

Reading a text file line-by-line A proper way to read a text file line-by-line till the end is usually not clear from ifstream documentation. Let's consider some common mistakes done by beginner C++ programmers, and a proper way to read the file. Lines without whitespace characters For the sake o...

The try...catch...finally statement combines exception handling with clean-up code. The finally block contains code that will be executed in all circumstances. This makes them suitable for resource management, and other kinds of cleanup. Try-finally Here is an example of the simpler (try...finally...

Passport must be initialized using passport.initialize() middleware. To use login sessions, passport.session() middleware is required. Note that passport.serialize() and passport.deserializeUser() methods must be defined. Passport will serialize and deserialize user instances to and from the sessi...

template<class ... Types> struct Tuple {}; A parameter pack is a template parameter accepting zero or more template arguments. If a template has at least one parameter pack is a variadic template.

The pattern parameter_pack ... is expanded into a list of comma-separated substitutions of parameter_pack with each one of its parameters template<class T> // Base of recursion void variadic_printer(T last_argument) { std::cout << last_argument; } template<class T, class .....

Java's checked exception mechanism requires the programmer to declare that certain methods could throw specifed checked exceptions. This is done using the throws clause. For example: public class OddNumberException extends Exception { // a checked exception } public void checkEven(int number) ...

CREATE OR REPLACE TRIGGER CORE_MANUAL_BIUR BEFORE INSERT OR UPDATE ON CORE_MANUAL FOR EACH ROW BEGIN if inserting then -- only set the current date if it is not specified if :new.created is null then :new.created := sysdate; end if; end if; -- always s...

ReactiveCocoa supports macOS 10.9+, iOS 8.0+, watchOS 2.0+, and tvOS 9.0+. Carthage If you use Carthage to manage your dependencies, simply add ReactiveCocoa to your Cartfile: github "ReactiveCocoa/ReactiveCocoa" ~> 5.0 If you use Carthage to build your dependencies, make sure you...

This will be a relatively comprehensive tutorial of how to write a command line tool to print the weather from the zip code provided to the command line tool. The first step is to write the program in ruby to do this action. Let's start by writing a method weather(zip_code) (This method requires the...

What is Dagger 2 ? The website describes itself as: Dagger is a fully static, compile-time dependency injection framework The library makes it easy to model dependency graphs as well as to reuse objects. Since reflection is only used at compile time as part of the annotation processing Dagger...

In the following example we will be creating a table called Membership using the AWS Java SDK for DynamoDB. The table will consist of items that represent team assignments. The table will be partitioned by TeamID. Each team will have multiple members, identified by the MemberID (as a sort key). AWS...