Tutorial by Examples: an

MultiDex is a library in the Android APK that allows the app to have more than 65,536 methods. The Android APKs have Dalvik Executable files (.dex) that contain the generated bytecodes compiled from your Java code. Each .dex file can contain up to 65,536 methods (2^16). Android OS versions before ...

golang/dep is a prototype dependency management tool. Soon to be an official versioning tool. Current status Alpha. Usage Get the tool via $ go get -u github.com/golang/dep/... Typical usage on a new repo might be $ dep init $ dep ensure -update To update a dependency to a new version, yo...

Pipes supports simple binary communication between a client and a server In this example: a client connects and sends a FirstMessage the server receives and answers DoSomething 0 the client receives and answers DoNothing step 2 and 3 are repeated indefinitely The command data type exchange...

During coding, unexpected errors do arise frequently enough, which requires debugging and testing. But sometimes the errors are indeed expected and to bypass it, there is the Try..Catch..Throw..Finally..End Try block. To manage an error correctly, the code is put into a Try..Catch block, whereby th...

Support Portrait and Landscape both type of image Drawing and other subviews can be merged in my case I'm adding label to draw { CGSize fullSize = getImageForEdit.size; CGSize sizeInView = AVMakeRectWithAspectRatioInsideRect(imgViewFake.image.size, imgViewFake.bounds).size; CGFl...

One of the best Linux distributions currently for Raspberry Pi (from now on, "RPi") is Arch Linux. This web shows the installation for: RPi2. ARMv7 architecture (32 bits). RPi3. There are two options: ARMv7 architecture (32 bits) or AArch architecture (64 bits). This t...

ProGuard is a tool used in the building process to optimize and obfuscate the Java code of your APK, and also remove unused classes. The resulting APK when using ProGuard will have a smaller size and will be harder to reverse-engineer (decompilation). ProGuard can be used too in Xamarin.Android app...

You made a great app and tested it in Debug, with good results. Everything was working fine! But then, you decided to prepare your app for release. You set up MultiDex, ProGuard and Linker, and then, it stopped working. This tutorial aims to help you to find out common problems related to ProGuard...

Inspect ssl certificate openssl x509 -in server.crt -noout -text Generate server key openssl genrsa -out server.key 2048 Generate csr openssl req -out server.csr -key server.key -new

First, why do we need lxml ? lxml.etree is a generic API for XML and HTML handling. It aims for ElementTree compatibility and supports the entire XML infoset. It is well suited for both mixed content and data centric XML. Its generality makes it the best choice for most applications. The lxml libr...

Any Acumatica application developer spends a great deal of their time writing BQL code. At the same time, not everybody knows the underlying details of how BQL types work under the hood. At the heart of BQL lay two key methods: Parse() and Verify(), declared by the IBqlCreator interface. Most of th...

Here is a list of actions which can be triggered in the Midnight Commander filesystem browsing mode by using function keys on your keyboard. F1 Displays help F2 Opens user menu F3 Displays the contents of the selected file F4 Opens the selected file in the internal file editor F5 Copies th...

Midnight Commander has a built in editor which is started by F4 function key when over the desired file in the browse mode. It can also be invoked in standalone mode by executing mcedit <filename> Here is a list of actions which can be triggered in the edit mode. F1 Displays help F2 Saves ...

There are two ever-so-slightly different engines of regular expressions implemented in R. The default is called POSIX-consistent; all regex functions in R are also equipped with an option to turn on the latter type: perl = TRUE. Look-ahead/look-behind perl = TRUE enables look-ahead and look-behind...

The method of SQL generation from BQL PXSelectGroupBy<> data views has been changed in Acumatica Framework 5.2. The sections below illustrate the differences using the example of PXSelectGroupBy<FinYear, Aggregate<GroupBy<FinYear.finPeriods>>>.Select(graph): Acumatica Frame...

Existing legends can be difficult to manage. For example, if your plot has two lines, but only one of them has a legend entry and that should stay this way, then adding a third line with a legend entry can be difficult. Example: figure hold on fplot(@sin) fplot(@cos) legend sin % Add only a le...

You can establish a transaction by calling the pipeline method on the StrictRedis. Redis commands executed against the transaction are performed in a single block. # defaults to transaction=True tx = r.pipeline() tx.hincrbyfloat(debit_account_key, 'balance', -amount) tx.hincrbyfloat(credit_acc...

In the code below you can see how to add a command to your plugin. MainClass.java package yourpackage; import org.bukkit.command.Command; import org.bukkit.command.CommandSender; import org.bukkit.plugin.java.JavaPlugin; public class MainClass extends JavaPlugin { @Override public bool...

By default, NuGet restores packages into the packages folder in the solution root. This folder is shared between all solution projects. In some cases it is useful to change the location of the restored packages (for instance, to share them between several solutions). Its can be achieved by creating...

For all my projects, Django-Allauth remained one that is easy to setup, and comes out of the box with many features including but not limited to: Some 50+ social networks authentications Mix signup of both local and social accounts Multiple social accounts Optional instant-signup for social ac...