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The FlagsAttribute should be used whenever the enumerable represents a collection of flags, rather than a single value. The numeric value assigned to each enum value helps when manipulating enums using bitwise operators. Example 1 : With [Flags] [Flags] enum Colors { Red=1, Blue=2, ...

In order to inspect an image, you can use the image ID or the image name, consisting of repository and tag. Say, you have the CentOS 6 base image: ➜ ~ docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos centos6 cf2c3...

String.prototype.toUpperCase(): console.log('qwerty'.toUpperCase()); // 'QWERTY'

String.prototype.toLowerCase() console.log('QWERTY'.toLowerCase()); // 'qwerty'

Token pasting allows one to glue together two macro arguments. For example, front##back yields frontback. A famous example is Win32's <TCHAR.H> header. In standard C, one can write L"string" to declare a wide character string. However, Windows API allows one to convert between wide c...

A predefined macro is a macro that is already understood by the C pre processor without the program needing to define it. Examples include Mandatory Pre-Defined Macros __FILE__, which gives the file name of the current source file (a string literal), __LINE__ for the current line number (an int...

Detailed instructions on getting ssl set up or installed.

To generate an XML documentation file from documentation comments in the code, use the /doc option with the csc.exe C# compiler. In Visual Studio 2013/2015, In Project -> Properties -> Build -> Output, check the XML documentation file checkbox: When you build the project, an XML file wi...

Salt can be installed via : salt-bootstrap: a shell script, that can install salt (client and/or master packages) on standard Unix/Linux platform, Platform Specific binaries: available for Windows, Mac OS X and Linux, Package Management systems: available for pacman, apt-get, yum and other pack...

TreeWalker is a generator-like interface that makes recursively filtering nodes in a DOM tree easy and efficient. The following code concatenates the value of all Text nodes in the page, and prints the result. let parentNode = document.body; let treeWalker = document.createTreeWalker(parentNode, ...

Horizontally vim -o file1.txt file2.txt Vertically vim -O file1.txt file2.txt You may optionally specify the number of splits to open. The following example opens two horizontal splits and loads file3.txt in a buffer: vim -o2 file1.txt file2.txt file3.txt

You are allowed to implement custom exceptions that can be thrown just like any other exception. This makes sense when you want to make your exceptions distinguishable from other errors during runtime. In this example we will create a custom exception for clear handling of problems the application ...

In normal mode: ~ inverts the case of the character under the cursor, gu{motion} lowercases the text covered by {motion}, gU{motion} uppercases the text covered by {motion} Example (^ marks the cursor position): Lorem ipsum dolor sit amet. ^ Lorem ipSum dolor sit amet. ~ Lorem...

So, you make first a .war file let's say a portlet of name <YOUR PLUGIN>.war. You wanna have it running on a glassfish domain under Liferay portal. Steps to success: Navigate to Control Panel -> Plugins Installation on Liferay Hit Install new portlets Hit Configuration Fill in to Dep...

Before to launch you to code with Pug, you need to have some prerequisits. You will need to install: NodeJS with NPM ExpressJS (optional) After installing NodeJS, you can check in your terminal the correct installation doing: $ node -v If successful, it will print the number of Node's ve...

Summary This goal is to reorganize all of your scattered commits into more meaningful commits for easier code reviews. If there are too many layers of changes across too many files at once, it is harder to do a code review. If you can reorganize your chronologically created commits into topical com...

The History Microsoft windows is an operating system available in 137 languages, wrote in C,C++ & Assembly , can be installed on "ARM, IA-32, Itanium, x86-64, DEC Alpha, MIPS, PowerPC" platforms first release was in November 20 ,1985 as windows 1.0 with about 2 billion PC(per...

If your code encounters a condition it doesn't know how to handle, such as an incorrect parameter, it should raise the appropriate exception. def even_the_odds(odds): if odds % 2 != 1: raise ValueError("Did not get an odd number") return odds + 1

Use try...except: to catch exceptions. You should specify as precise an exception as you can: try: x = 5 / 0 except ZeroDivisionError as e: # `e` is the exception object print("Got a divide by zero! The exception was:", e) # handle exceptional case x = 0 final...

Sometimes, you may want something to occur regardless of whatever exception happened, for example, if you have to clean up some resources. The finally block of a try clause will happen regardless of whether any exceptions were raised. resource = allocate_some_expensive_resource() try: do_stu...