Tutorial by Examples: v

Moving a worktree

Currently (as of version 2.11.0) there is no built-in functionality to move an already existing worktree. This is listed as an official bug (see https://git-scm.com/docs/git-worktree#_bugs). To get around this limitation it is possible to perform manual operations directly in the .git reference fil...

Git • Worktrees

Individual Shader Object Compilation in C++

The traditional GLSL compilation model involves compiling code for a shader stage into a shader object, then linking multiple shader objects (covering all of the stages you want to use) into a single program object. Since 4.2, program objects can be created that have only one shader stage. This met...

opengl • Shader Loading and Compilation

Radix 2 Inverse FFT

Due to the strong duality of the Fourier Transform, adjusting the output of a forward transform can produce the inverse FFT. Data in the frequency domain can be converted to the time domain by the following method: Find the complex conjugate of the frequency domain data by inverting the imaginary...

algorithm • Fast Fourier Transform

Comparing Errorlevel

If Errorlevel 1 ( Echo Errorlevel is 1 or higher REM The phrase "1 or higher" is used because If Errorlevel 1 statement means: REM If %Errorlevel% GEQ 1 REM Not If %Errorlevel% EQU 1 ) ...

batch-file • If statements

If variable exists / set

If Defined Foo ( Echo Foo is defined ) This would check if a variable is defined or not. Again, the Not operator can be used.

batch-file • If statements

Changing drive without CD /D

Pushd "D:\Foo" Dir Popd Pushd will change the directory to the directory following (in this case D:\Foo. Popd returns back to the original directory.

batch-file • Changing Directories and Listing their Contents

Solving "Invisible MTP files" problem.

If you create files for exporting via USB cable to desktop using MTP protocol, may be a problem that newly created files are not immediately visible in the file explorer running on the connected desktop PC. To to make new files visible, you need to call MediaScannerConnection: File file = new File(...

Android • FileIO with Android

Hive UDF to trim the given string.

package MyHiveUDFs; import org.apache.commons.lang.StringUtils; import org.apache.hadoop.hive.ql.exec.UDF; import org.apache.hadoop.io.Text; public class Strip extends UDF { private Text result = new Text(); public Text evaluate(Text str) { if(str == null) { return null; } resul...

hive • Hive User Defined Functions (UDF's)

install the popular Clonezilla to clone a Mac OS hard drive (basic usage)

Naturally, being able to install hard drive cloning utilities can be an important aspect of installing and maintaining your operating system. Getting set up with Clonezilla is surprisingly less straightforward than I'd have expected. The wealth of options, while valuable, also makes each part of id...

operating-system • Getting started with operating-system

phpversion()

Introduction When working with various libraries and their associated requirements, it is often necessary to know the version of current PHP parser or one of it's packages. This function accepts a single optional parameter in the form of extension name: phpversion('extension'). If the extension in...

PHP • Debugging

Accessing variables

In Twig templates variables can be accessed using double curly braces notation {{ variableName }}. Basic example of greeting user <!DOCTYPE html> <html> <body> <span>Hello {{ name }}</span> </body> </html> Accessing array elements Twig as ...

twig • Basic template syntax

Uninstall a module my name and version

Uninstall-Module -Name <Name> -RequiredVersion <Version>

PowerShell • Package management

RunTime Type Services

RunTime Type Services (short: RTTS) are used either for: creating types (RunTime Type Creation; short: RTTC) analysing types (RunTime Type Identification; short: RTTI) Classes CL_ABAP_TYPEDESCR | |--CL_ABAP_DATADESCR | | | |--CL_ABAP_ELEMDESCR | |--CL_ABAP_REFDESCR ...

ABAP • Dynamic Programming

Verbs

Verbs used to name CmdLets should be named from verbs from the list supplied be Get-Verb Further details on how to use verbs can be found at Approved Verbs for Windows PowerShell

PowerShell • Cmdlet Naming

Server side Implementation

import socket import hashlib import os import time import itertools import threading import sys import Crypto.Cipher.AES as AES from Crypto.PublicKey import RSA from CryptoPlus.Cipher import IDEA #server address and port number input from admin host= raw_input("Server Address - &gt...

Python Language • Sockets And Message Encryption/Decryption Between Client and Server

Save View lookups with the ViewHolder pattern

Especially in a ListView, you can run into performance problems by doing too many findViewById() calls during scrolling. By using the ViewHolder pattern, you can save these lookups and improve your ListView performance. If your list item contains a single TextView, create a ViewHolder class to stor...

Android • Performance Optimization

Check your Ansible version

Check the right software versions are installed: ansible >=2.0 python >=2.6 shade module for python $ansible --version ansible 2.2.0.0 $python --version Python 2.7.5 Install 'shade' the python component used to pilot openstack. $pip install shade Note : if you use a company...

ansible • Using Ansible with OpenStack

Server Requirements

The Laravel framework has a few system requirements. Of course, all of these requirements are satisfied by the Laravel Homestead virtual machine, so it's highly recommended that you use Homestead as your local Laravel development environment. However, if you are not using Homestead, you will need t...

Laravel • Getting started with laravel-5.3

Local Development Server

If you have PHP installed locally and you would like to use PHP's built-in development server to serve your application, you may use the serve Artisan command. This command will start a development server at http://localhost:8000: php artisan serve Of course, more robust local development option...

Laravel • Getting started with laravel-5.3

Hello World Example (Basic) and with using a view

The basic example Open routes/web.php file and paste the following code in file: Route::get('helloworld', function () { return '<h1>Hello World</h1>'; }); here 'helloworld' will act as page name you want to access, and if you don't want to create blade file and still want to ...

Laravel • Getting started with laravel-5.3