Using
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Revision as of 21:40, 11 August 2014
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Using
Description
Executes the expressions then runs the code within the statements and finally automatically runs unset() on each expression in the expressions list (Basically cleaning up after you).
using( <expressions> )
{
statements
...
}
Parameters
expressions
A list of expressions to execute separated by ,
Remarks
None.
Example
Example on a simple string:
my $cat = "yyy"; // String exists using( $cat ) // using will use the string { println("str is: $cat"); // prints the string just fine } println("Final: $cat"); // nothing... the string no longer exists...
Example of using it with a class that will be deleted after the using block ends:
using( $newString = new CString("meow") ) { println("Hello world!: " . $newString); } // Immediately after the using block finishes the class gets unset() and its __Destruct will be run.
You can also stack them example:
my $cat = "yyy"; using( $cat, $newString = new CString("meow"), $coolstring = new CString("moo") ) { // the $cat and both class variables get unset once this block ends }
