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CSS specificity intends to promote code conciseness by allowing an author to define some general formatting rules for a broad set of elements, and then to override them for a certain subset.

require Module::Name; # Require by name from @INC require "path/to/file.pm"; # Require by relative path from @INC use Module::Name; # require and default import at BEGIN use Module::Name (); # require and no import at BEGIN use Module::Name (@ARGS); # require and import with args at...

Terminology The Caret (^) character is also referred to by the following terms: hat control uparrow chevron circumflex accent Usage It has two uses in regular expressions: To denote the start of the line If used immediately after a square bracket ([^) it acts to negate the set of a...

void (*signal(int sig, void (*func)(int)))(int); ParameterDetailssigThe signal to set the signal handler to, one of SIGABRT, SIGFPE, SIGILL, SIGTERM, SIGINT, SIGSEGV or some implementation defined valuefuncThe signal handler, which is either of the following: SIG_DFL, for the default handler...

Variable arguments are used by functions in the printf family (printf, fprintf, etc) and others to allow a function to be called with a different number of arguments each time, hence the name varargs. To implement functions using the variable arguments feature, use #include <stdarg.h>. To ca...

The CASE expression is used to implement if-then logic. CASE input_expression  WHEN compare1 THEN result1 [WHEN compare2 THEN result2]... [ELSE resultX] END CASE  WHEN condition1 THEN result1 [WHEN condition2 THEN result2]... [ELSE resultX] END The simple CASE expression return...

ParameterDetailsstring $toThe recipient email addressstring $subjectThe subject linestring $messageThe body of the emailstring $additional_headersOptional: headers to add to the emailstring $additional_parametersOptional: arguments to pass to the configured mail send application in the command line...

The init() is a special method in classes which is used to declare an initializer for the class. More information can be found here: Initializers

Classes, functions, and (since C++14) variables can be templated. A template is a piece of code with some free parameters that will become a concrete class, function, or variable when all parameters are specified. Parameters can be types, values, or themselves templates. A well-known template is std...

A 9-patch image file is a specially formatted file so that Android knows which areas/portions of the image can or cannot be scaled. It breaks your image into a 3x3 grid. The corners remain unscaled, the sides are scaled in one direction and the center is scaled in both dimensions. A Nine Patch ...

In C++ Metaprogramming refers to the use of macros or templates to generate code at compile-time. In general, macros are frowned upon in this role and templates are preferred, although they are not as generic. Template metaprogramming often makes use of compile-time computations, whether via templ...

VBScript (VBS) is a Visual Basic-flavored scripting language for Internet Explorer and Windows. It can be used on the web in principle, like JavaScript, but does not have much support, so it's usually confined to standalone or server-side scripts in business environments that use Windows exclusive...

VersionRelease Date1.0.02016-04-14

ParameterDetailsbillingAgreementAttributesConfiguration object to create the billing agreementbillingPlanBilling plan ID from the query stringbillingPlanAttribsConfiguration object to create the billing planbillingPlanUpdateAttributesConfiguration object for changing a billing plan to an active sta...

Proc.new(block) lambda { |args| code } ->(arg1, arg2) { code } object.to_proc { |single_arg| code } do |arg, (key, value)| code end Be careful about operator precedence when you have a line with multiple methods chained, like: str = "abcdefg" puts str.gsub(/./) do |mat...

Conditional expressions, involving keywords such as if, else if, and else, provide Swift programs with the ability to perform different actions depending on a Boolean condition: True or False. This section covers the use of Swift conditionals, Boolean logic, and ternary statements. For more in...

Not all elements of the XML input will end up as elements of the parsed tree. Currently, this module skips over any XML comments, processing instructions, and document type declarations in the input. Nevertheless, trees built using this module’s API rather than parsing from XML text can have comm...