Tutorial by Examples: t

Resource Acquisition Is Initialization (RAII) is a common idiom in resource management. In the case of dynamic memory, it uses smart pointers to accomplish resource management. When using RAII, an acquired resource is immediately given ownership to a smart pointer or equivalent resource manager. The...

The Hello Audio! of Java that plays a sound file from local or internet storage looks as follows. It works for uncompressed .wav files and should not be used for playing mp3 or compressed files. import java.io.*; import java.net.URL; import javax.sound.sampled.*; public class SoundClipTest { ...

from subprocess import check_call ok = check_call(['ffmpeg','-i','input.mp3','output.wav']) if ok: with open('output.wav', 'rb') as f: wav_file = f.read() note: http://superuser.com/questions/507386/why-would-i-choose-libav-over-ffmpeg-or-is-there-even-a-difference What are ...

Flask's built-in webserver is able to serve static assets, and this works fine for development. However, for production deployments that are using something like uWSGI or Gunicorn to serve the Flask application, the task of serving static files is one that is typically offloaded to the frontend webs...

# from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer # python2 from http.server import BaseHTTPRequestHandler, HTTPServer # python3 class HandleRequests(BaseHTTPRequestHandler): def _set_headers(self): self.send_response(200) self.send_header('Content-type', 'text...

Detailed instructions on getting serial-port set up or installed.

Problems may happen when multiple threads try to access a resource. For a simple example, suppose we have a thread that adds one to a variable. It does this by first reading the variable, adding one to it, then storing it back. Suppose we initialize this variable to 1, then create two instances of t...

double res[MAX]; int i; #pragma omp parallel { #pragma omp for for (i=0;i< MAX; i++) { res[i] = huge(); } } The for loop will be executed in parallel. huge() is some method which can take too long to get execute. OpenMP supports a shortcut to write the ab...

#include <omp.h> void main () { int i; double ZZ, func(), res=0.0; #pragma omp parallel for reduction(+:res) private(ZZ) for (i=0; i< 1000; i++){ ZZ = func(I); res = res + ZZ; } } In the last line: Actually added to a private ...

If you closely observe that ,there is no separate web service template in .Framework 2010 as you see in 2008 while adding a project or web site it might be because of WCF. So let us start using a different way to add a web service using a template "Start" - "All Programs" ...

So the main goal of this function is to : Be standalone because it needs to be written in the main VbScript file and cannot be in an included file (because it defines the include function) Provide enough information if something goes wrong (ie. the file that was being included, the error that oc...

<p class="alert alert-success" *ngIf="names.length > 2">Currently there are more than 2 names!</p>

NgFor provides Some values that can be aliased to local variables index -(variable) position of the current item in the iterable starting at 0 first -(boolean) true if the current item is the first item in the iterable last -(boolean) true if the current item is the last item in the iterable ...

<?php if (!function_exists('document')) { function document($text = '') { return $text; } } Create a helpers.php file, let's assume for now it lives in app/Helpers/document.php. You can put many helpers in one file (this is how Laravel does it) or you can split them up b...

To generate schema, view, controller, migration file for the repository, default CRUD templates and test files for a model (like a scaffolding in Rails) one can use phoenix.gen.html mix task like this: mix phoenix.gen.html Book books title note:text pages:integer author_id:references:authors Wh...

Increment / Decrement A pointer can be incremented or decremented (prefix and postfix). Incrementing a pointer advances the pointer value to the element in the array one element past the currently pointed to element. Decrementing a pointer moves it to the previous element in the array. Pointer ari...

Unfortunately Sencha does not directly give you access to Extjs 4. Their download SDK links lead directly to the newer version of Extjs (currently 6). Although you can still find websites that are hosting the library files (I will have to leave you to it since Extjs is under the LGPL license for o...

Detailed instructions on getting perforce set up or installed.

Streams come in three flavors. Release streams (yellow), Mainlines (Grey) and Development (Blue). Each stream has a different purpose and rules related to its function.

Display the date by itself (custom field is tour_date): <p>Tour Date <?php the_field('tour_date');?></p>