Tutorial by Examples: nd

Add Firebase to Your Android Project

Here are simplified steps (based on the official documentation) required to create a Firebase project and connect it with an Android app. Add Firebase to your app Create a Firebase project in the Firebase console and click Create New Project. Click Add Firebase to your Android app and fol...

Android • Firebase

How to write a standalone plugin

gradle • Gradle Plugins

Post-installation checking and configuration on Linux

After installing a Java SDK, it is advisable to check that it is ready to use. You can do this by running these two commands, using your normal user account: $ java -version $ javac -version These commands print out the version information for the JRE and JDK (respectively) that are on your sh...

Java Language • Installing Java (Standard Edition)

Error Handling

boost::program_options::notify can be used to report any errors in the paramters passing #include <boost/program_options.hpp> #include <string> #include <iostream> int main(int argc, char** argv) { namespace po = boost::program_options; po::variables_map vm; po::op...

boost • Boost Program Options

Use SafeHandle when wrapping unmanaged resources

When writing wrappers for unmanaged resources, you should subclass SafeHandle rather than trying to implement IDisposable and a finalizer yourself. Your SafeHandle subclass should be as small and simple as possible to minimize the chance of a handle leak. This likely means that your SafeHandle imple...

.NET Framework • Memory management

How to Debug nativescript-android App over WiFi (without Root)

1-You need to connect your device to your computer via USB cable. Make sure USB debugging is working. You can check if it shows up when running adb devices(or tns device). 2-Run adb tcpip 5555 3-Disconnect your device (remove the USB cable). 4-Go to the Settings -> About phone -> Status...

nativescript • Getting started with nativescript

Background images

Full width table cell background images <html xmlns:v="urn:schemas-microsoft-com:vml"> <head> <style> v:* { behavior: url(#default#VML); display: inline-block; } </style> </head> <body> <center> <...

email • HTML email composition and Outlook intricacies

Create and Update Patches

Create new patches with hg qnew patch-name and then update them with new changes with hg qrefresh: hg qnew myFirstPatch // Creates a new patch called "myFirstPatch" ... // Edit some files hg qrefresh // Updates "myFirstPatch" with changes hg qnew ...

mercurial • Mercurial Queues

Push and Pop Patches

Pushing a patch applies the patch to the repository while poping a patch unapplies the patch from the repository. Pop the current patch off the queue with hg qpop and push it back onto the queue with hg qpush: hg qpop hg qpush Pop all patches: hg qpop -a PUsh all patches: hg qpush -a ...

mercurial • Mercurial Queues

Commands

qnew: create a new patch qpop: pop the current patch off the stack qpush: push the next patch onto the stack qrefresh: update the current patch qapplied: print the patches already applied qseries: print the entire series file qfinish: move applied patches into repository history qdelete: re...

mercurial • Mercurial Queues

Extending Behat with Mink

Mink provides an interface for web drivers (like Goutte and Selenium) as well as a MinkContext which, when extended, provides additional web language for our steps. To install Mink (and the default Goutte driver): $ composer require --dev behat/mink-extension="^2.0" $ composer require -...

behat • Getting started with behat

Testing JavaScript with Mink and Selenium

If we want to test JavaScript on a website, we'll need to use something a bit more powerful than Goutte (which is just cURL via Guzzle). There are a couple of options such as ZombieJS, Selenium and Sahi. For this example I'll use Selenium. First you'll need to install the drivers for Mink: $ compo...

behat • Getting started with behat

Understanding Django 1.10 middleware's new style

Django 1.10 introduced a new middleware style where process_request and process_response are merged together. In this new style, a middleware is a callable that returns another callable. Well, actually the former is a middleware factory and the latter is the actual middleware. The middleware facto...

Django • Middleware

Pitfall - Leaving out braces: the "dangling if" and "dangling else" problems

The latest version of the Oracle Java style guide mandates that the "then" and "else" statements in an if statement should always be enclosed in "braces" or "curly brackets". Similar rules apply to the bodies of various loop statements. if (a) { //...

Java Language • Java Pitfalls - Language syntax

Important commands

Documenting your work Remember what you've done and retain long outputs which can't be kept in WinDbg's buffer. It's always good to have a log available for reproducing debugging steps, e.g. to ask questions on Stack Overflow. CommandPurpose.logopencreate a log file.logcloseclose the log file.dump...

WinDbg • User mode / application debugging

Installing and setting up django project using Cookiecutter

Following are the Prerequisites for installing Cookiecutter: pip virtualenv PostgreSQL Create a virtualenv for your project and activate it: $ mkvirtualenv <virtualenv name> $ workon <virtualenv name> Now install Cookiecutter using: $ pip install cookiecutter Change dire...

Django • How to use Django with Cookiecutter?

Find point on curve

This example finds a point on a bezier or cubic curve at position where position is he unit distance on the curve 0 <= position <= 1. The position is clamped to the range thus if values < 0 or > 1 are passed they will be set 0,1 respectively. Pass the function 6 coordinates for quadrati...

html5-canvas • Navigating along a Path

Profiling CPU Usage with gcc and Google Perf Tools

Google Perf Tools also provides a CPU profiler, with a slightly friendlier interface. To use it: Install Google Perf Tools Compile your code as usual Add the libprofiler profiler library to your library load path at runtime Use pprof to generate a flat execution profile, or a callgraph diagram...

C++ • Profiling

Using shell without extending Mage_Shell_Abstract

Bootstrapping Magento by calling: require_once 'app/Mage.php'; Mage::app(); // Your code This is the simplest way but not really the Magento way because we're not using class that extends Mage_Shell_Abstract - the class which when extended provides us with tools to parse command line arguments...

magento • Shell, CLI

Using shell the Magento way - extend Mage_Shell_Abstract

Magento way File resides in shell/custom.php <?php require_once' abstract.php'; class Stackoverflow_Shell_Custom extends Mage_Shell_Abstract { protected $_argname = array(); public function __construct() { parent::__construct(); // Time limit to infinity ...

magento • Shell, CLI