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Run-time memory management with Rc can be very useful, but it can also be difficult to wrap one's head around, especially if your code is very complex and a single instance is referenced by tens or even hundreds of other types in many scopes. Writing a Drop trait that includes println!("Droppi...

Background To get the product of a register and a constant and store it in another register, the naïve way is to do this: imul ecx, 3 ; Set ecx to 5 times its previous value imul edx, eax, 5 ; Store 5 times the contend of eax in edx Use lea Multiplications are expensive operation...

Detailed instructions on getting cocoa-touch set up or installed.

Start with a properly configured gradle project. In your project-local (not top-level) build.gradle append extensions plugin declaration below your Kotlin plugin, on top-level indentation level. buildscript { ... } apply plugin: "com.android.application" ... apply plugin: &quo...

Android extensions also work with multiple Android Product Flavors. For example if we have flavors in build.gradle like so: android { productFlavors { paid { ... } free { ... } } } And for example, only the free flavor has ...

UINavigationController is used to form a tree-like hierarchy of view controllers, which is known as a navigation stack. From developers perspective: You can connect independently made controller and get all the benefits of a free hierarchy manager and common UI presenter gratis. UINavigationContro...

a simple yet very useful command: :g/ending/m$ moves lines containing ending to the end of the buffer. m means move $ means end of buffer, while 0 means beginning of buffer.

The C standard (C11, and C99 too) defines the following flags for printf(): FlagConversionsMeaning-allThe result of the conversion shall be left-justified within the field. The conversion is right-justified if this flag is not specified.+signed numericThe result of a signed conversion shall always ...

Given a ByteBuffer instance one can write primitive-type data to it using relative and absolute put. The striking difference is that putting data using the relative method keeps track of the index the data is inserted at for you, while the absolute method always requires giving an index to put the d...

Below is an Employer entity class which is mapped to the table employer. As you can see I used fetch = FetchType.LAZY instead of fetch = FetchType.EAGER. The reason I am using LAZY is because Employer may have a lot of properties later on and every time I may not need to know all the fields of an Em...

Let’s get into using some Git. First things first—you have to install it. You can get it a number of ways; the two major ones are to install it from source or to install an existing package for your platform. Installing from Source If you can, it’s generally useful to install Git from source, beca...

Detailed instructions on getting microsoft-dynamics set up or installed.

The interactive mode The most basic way to use R is the interactive mode. You type commands and immediately get the result from R. Using R as a calculator Start R by typing R at the command prompt of your operating system or by executing RGui on Windows. Below you can see a screenshot of an inter...

Detailed instructions on getting proguard set up or installed.

Each standard Oracle error is associated with an error number. Its important to anticipate what could go wrong in your code. Here for a connection to another database it can be: -28000 account is locked -28001 password expired -28002 grace period -1017 wrong user / password Here is a way to...

To illustrate this, here is a function that has 3 different "wrong" behaviors parameter is completely stupid: we use a user-defined expression parameter has a typo: we use Oracle standard NO_DATA_FOUND error another, but not handled case Feel free to adapt it to your standards: DE...

Detailed instructions on getting fpga set up or installed.

You can use the ng generate or ng g command to generate Angular building blocks (components, services, pipes, etc.). You can find all possible blueprints in the table below: ScaffoldUsageShortenedComponentng generate component component-nameng g c component-nameDirectiveng generate directive direc...

class MyToolbarControl { public: MyToolbarControl(HWND hWndToolbar, HWND hWndNotifyParent = nullptr) : _Handle(hWndToolbar) { if (hWndNotifyParent == nullptr) { hWndNotifyParent = GetAncestor(hWndToolbar, GA_ROOTOWNER); } SetWindowSubclass( ...

PyDotPlus is an improved version of the old pydot project that provides a Python Interface to Graphviz’s Dot language. Installation For the latest stable version: pip install pydotplus For the development version: pip install https://github.com/carlos-jenkins/pydotplus/archive/master.zip L...