Tutorial by Examples: c

TYPO3 is the leading enterprise content management system. It focuses on providing the features that professionals need to build and maintain large and/or complicated websites across multiple devices (mobile and desktop). Features Open Source Multilingual Frequent security updates - safety fir...

For C# there exist many wrappers that offer an interface to communicate with OpenCL. OpenCL.NET: This is one of the most low level wrappers out there. It offers a complete implementation of the OpenCL API for C# without adding any abstraction at all. So C\C++ examples are easily ported for this ...

if I forget the password then I'll get error. $ mysql -u root -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) I tried to solve the issue by first knowing the status: $ systemctl status mysql.service mysql.service - MySQL Community ...

In order to show an alert dialog containing a link which can be opened by clicking it, you can use the following code: AlertDialog.Builder builder1 = new AlertDialog.Builder(youractivity.this); builder1.setMessage(Html.fromHtml("your message,<a href=\"http://www.google.com\"&gt...

<?php $con = mysqli_connect("localhost", "root", "", "database"); ?>

Atom is versatile and flexible text editor and has hundreds of community-made, open-source packages that can compile and run source files, for many languages. This guide will show how easy it is to code Python with the Atom editor. This guide assumes you do not have Python nor Atom installed in you...

$data = $result->mysqli_fetch_array(MYSQLI_BOTH);

The key of parallelism is to use multiple threads to solve a problem (duh.) but there are some differences to classical multithreaded programming in how threads are organized. First lets talk about your typical GPU, for simplicities sake I'll focus on A GPU has many processing cores, which make it...

The typical scenario for your memory usage is to store the source data and the processed data in the global memory. When a threadblock starts, it first copies all relevant parts into the shared memory before getting their parts into the registers. Memory access latency also depends on your memory s...

OpenCL Kernels can be either executed on the GPU or the CPU. This allows for fallback solutions, where the customer may have a very outdated system. The programmer can also choose to limit their functionality to either the CPU or GPU. To get started using OpenCL, you'll need a 'Context' and a 'Devi...

Kernels can be compiled at runtime on the target device. To do so, you need the kernel source code the target device on which to compile a context built with the target device A quick terminology update: A program contains a collection of kernels. You can think of a program as a complete C/C...

To initiate any operation on your devices, you'll need a command queue for each device. The Queue keeps track of different calls you did to the target device and keeps them in order. Most commands can also be executed either in blocking or non-blocking mode. Creating a queue is pretty straightforwa...

So now we come down to the real stuff, executing your kernels on the parallel device. Please read about the hardware basics to fully understand the kernel dispatching. First you'll need to set the kernel arguments before actually calling the kernel. This is done via err = Cl.SetKernelArg(_kernel, ...

scons describes running phases itself. Running it over an empty SConstruct yields this: $ scons scons: Reading SConscript files ... scons: done reading SConscript files. scons: Building targets ... scons: `.' is up to date. scons: done building targets. To suppress phase messages, add -Q op...

Prepare helloworld.go (find below) package main import "fmt" func main(){ fmt.Println("hello world") } Run GOOS=linux GOARCH=arm go build helloworld.go Copy generated helloworld (arm executable) file to your target machine.

For-loop has no business being its own documentation page!

boolean has no business being its own documentation page!

There isn't much to add to Nokogiri's "Parsing an HTML/XML Document" tutorial, which is an easy introduction to the subject, so start there, then return to this page to help fill in some gaps. Nokogiri's basic parsing attempts to clean up a malformed document, sometimes adding missing clo...

Nokogiri is somewhat like a browser, in that it will attempt to provide something useful even if the incoming HTML or XML is malformed. Unfortunately it usually does it silently, but we can ask for a list of the errors using errors: require 'nokogiri' doc = Nokogiri::XML('<node><foo/&gt...

How to correctly extract text from nodes is one of the most popular questions we see, and almost invariably is made more difficult by misusing Nokogiri's "searching" methods. Nokogiri supports using CSS and XPath selectors. These are equivalent: doc.at('p').text # => "foo"...