Tutorial by Examples: all

Building and installing software

If you have found your software in the ports tree, now its the time to build it. Simple build and install with manual configuration cd /usr/ports/www/apache24 make make install Simple build and install with automatic configuration cd /usr/ports/www/apache24 make BATCH=yes make install ...

FreeBSD • Packages and Ports management

Pitfall - Efficiency concerns with regular expressions

Regular expression matching is a powerful tool (in Java, and in other contexts) but it does have some drawbacks. One of these that regular expressions tends to be rather expensive. Pattern and Matcher instances should be reused Consider the following example: /** * Test if all strings in a lis...

Java Language • Java Pitfalls - Performance Issues

Installing Cordova Plugin

cordova plugin add <plugin-name> Example: cordova plugin add cordova-plugin-camera The plugin should be installed in the root directory of the project. Note: Before adding the plugin replace the platform specific www folder content with the outer www folder in the root directory. Th...

Cordova • Cordova plugins: how to install, how they work, examples

Open camara and photo gallery

index.html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="Content-Security-Policy" content="default-src *; script-src 'self' 'unsafe-inline' 'unsafe-eval' *; style-src 'self' 'unsafe-inline' *"/> ...

ionic-framework • Device camera and photo library access from Ionic application

Installation or Setup

Detailed instructions on getting opencart set up or installed.

opencart • Getting started with opencart

Factory VS Service once-and-for-all

By definition: Services are basically constructor functions. They use ‘this’ keyword. Factories are simple functions hence return an object. Under the hood: Factories internally calls provider function. Services internally calls Factory function. Debate: Factories can run code before we retur...

AngularJS • Distinguishing Service vs Factory

Finding all instances of an entity class

All instances (objects) of an entity class can be loaded from the underlying database table as follows (akin to retrieving all rows from the table): Iterable<Foo> foos = fooRepository.findAll(); The findAll method is provided by the CrudRepository interface. It returns an Iterable instead ...

spring-data-jpa • Repositories

Finding all instances of an entity class with an attribute matching a specified value

All instances of an entity class with one of the class attributes matching a specified value can be retrieved as follows: public interface FooRepository extends CrudRepository<Foo, Long> { List<Foo> findAllByName(String name); } Invoking the findAllByName method results in the JP...

spring-data-jpa • Repositories

Installation or Setup

ICU(International Components for Unicode) can be installed as a library for the following languages: Java: ICU4J C/C++: ICU4C Python: pyICU Perl: Wrappers for ICU (PICU) C#: ICU-dotnet Erlang: icu4e Ruby: ffi-icu Haskell: text-icu Lua: ICU4Lua Here is a series of installion steps for a...

internationalization • Getting started with internationalization

Installation or Setup

Detailed instructions on getting raphael set up or installed.

raphael • Getting started with raphael

Installation or Setup

For Visual Studio [NuGet]: The easiest way of installing PhantomJS is by using a NuGet Package Manager. In your project, right click "References", and click on "Manage NuGet Packages" as shown: Then, type "PhantomJS" to the search bar, select it and install it as s...

phantomjs • Getting started with phantomjs

How to show all folders and in files in a directory

Usage to list all folders and files in the current directory: dir A target directory can also be specified: dir C:\TargetPath When specifying a path with spaces, it must be surrounded by quotes: dir "C:\Path With Spaces"

batch-file • Changing Directories and Listing their Contents

Fetch Audio/MP3 files from specific folder of device or fetch all files

First, add the following permissions to the manifest of your project in order to enable device storage access: <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> ...

Android • MediaStore

Installation or Setup

Since Sphinx is available on the Python Package Index, it can be installed using pip: pip install Sphinx or you can also install using easy_install easy_install -U sphinx Then you can check that it has been correctly installed by executing the following command: > sphinx-quickstart --ver...

python-sphinx • Getting started with python-sphinx

Installation or Setup

Detailed instructions on getting acumatica set up or installed.

acumatica • Getting started with acumatica

FREE an allocation

01 field-1 PIC X(80) BASED. ALLOCATE field-1 *> use field-1 FREE field-1 *> further use of field-1 will cause memory corruption

cobol • FREE statement

Getting values of all properties of a class

Given Example class extending BaseExample class with some properties: open class BaseExample(val baseField: String) class Example(val field1: String, val field2: Int, baseField: String): BaseExample(baseField) { val field3: String get() = "Property without backing ...

Kotlin • Reflection

Pitfall - Interning strings so that you can use == is a bad idea

When some programmers see this advice: "Testing strings using == is incorrect (unless the strings are interned)" their initial reaction is to intern strings so that they can use ==. (After all == is faster than calling String.equals(...), isn't it.) This is the wrong approach, from...

Java Language • Java Pitfalls - Performance Issues

Interpreting errors with "error" callback

Errors, when managed properly by the server, will be returned to your client with a specific HTTP status code different from 2xx (see RFC 2616 section 10). It's advised to catch globally your errors from your $.ajaxSetup() as demonstrated in the example below. Therefore all errors coming from your ...

ajax • Callbacks

Enable the internal logger in nlog.config

In case of problems, enable the internal logger <nlog internalLogFile="c:\log.txt" internalLogLevel="Trace"> <targets>  </targets> <rules>  </rules&gt...

nlog • Troubleshooting NLog