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Anchor tags are commonly used to link separate webpages, but they can also be used to link between different places in a single document, often within table of contents or even launch external applications. This topic explains the implementation and application of HTML anchor tags in various roles. ...

global a, b, c nonlocal a, b x = something # binds x (x, y) = something # binds x and y x += something # binds x. Similarly for all other "op=" del x # binds x for x in something: # binds x with something as x: # binds x except Exception as ex: # binds ex inside block ...

try { … } catch (error) { … } try { … } finally { … } try { … } catch (error) { … } finally { … } throw new Error([message]); throw Error([message]); try allows you to define a block of code to be tested for errors while it is being executed. catch allows you to define a block of code ...

timeoutID = setTimeout(function() {}, milliseconds) intervalID = setInterval(function() {}, milliseconds) timeoutID = setTimeout(function() {}, milliseconds, parameter, parameter, ...) intervalID = setInterval(function() {}, milliseconds, parameter, parameter, ...) clearTimeout(timeoutID) cle...

For more information about errors, see The Swift Programming Language.

obj[start:stop:step] slice(stop) slice(start, stop[, step]) ParamerDescriptionobjThe object that you want to extract a "sub-object" fromstartThe index of obj that you want the sub-object to start from (keep in mind that Python is zero-indexed, meaning that the first item of obj h...

String.characters // Returns an Array of the characters in the String String.characters.count // Returns the number of characters String.utf8 // A String.UTF8View, returns the UTF-8 character points in the String String.utf16 // A String.UTF16View, returns the UTF-16 character points in the St...

trap action sigspec... # Run "action" on a list of signals trap sigspec... # Omitting action resets traps for signals ParameterMeaning-pList currently installed traps-lList signal names and corresponding numbers The trap utility is a special shell built-in. It's defined in POSI...

Due to the flaws of rand(), many other default implementations have emerged over the years. Among those are: arc4random() (available on OS X and BSD) random() (available on Linux) drand48() (available on POSIX)

Xamarin.Android allows you to create native Android applications using the same UI controls as you would in Java, except with the flexibility and elegance of a modern language (C#), the power of the .NET Base Class Library (BCL), and two first-class IDEs - Xamarin Studio and Visual Studio - at the...

For further information, see Apple's documentation on Using Swift with Cocoa and Objective-C.

string date ( string $format [, int $timestamp = time() ] ) int strtotime ( string $time [, int $now ] )

QuantifiersDescription?Match the preceding character or subexpression 0 or 1 times (preferably 1).*Match the preceding character or subexpression 0 or more times (as many as possible).+Match the preceding character or subexpression 1 or more times (as many as possible).{n}Match the preceding chara...

All preprocessor commands begins with the hash (pound) symbol #. A C macro is just a preprocessor command that is defined using the #define preprocessor directive. During the preprocessing stage, the C preprocessor (a part of the C compiler) simply substitutes the body of the macro wherever its nam...

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.