Revision as of 14:32, 8 August 2014

Foreach As Key Value

Loop based on an expression.

foreach( <expression> as <key> => <value> )
{
    statements
    ...
}

An expression needs to be an array for this loop to happen.

The variable to place the key in most common as a $variable.

The variable to place the value in most common as a $variable.

For...As..Key..Value statements may be nested.

If you wish to edit an array as you loop through it check out Each( <array> ) command see its examples one of them should tell you how to do this.

Here we cycle through binary data :

$var = array(
		"One" => 100,
		"Two" => 200,
		"Three" => 300
		);
 
Foreach ($var as $key => $value)
{
	println( "Key '$key' | Value '$value'" );
}

A reverse foreach

$var = array(
		"One" => 100,
		"Two" => 200,
		"Three" => 300
		);
 
println( "Key '$key' | Value '$value'" ) Foreach ($var as $key => $value);

@@ Line 61: / Line 61: @@
 println( "Key '$key' | Value '$value'" ) Foreach ($var as $key => $value);
-</syntaxhighlight>
-Example of using Yield here
-<syntaxhighlight lang="sputnik">
-my $array = array("One" => "The", "Two" => "cat", "Three" => "and", "Four" => "the", "Five" => "dog");
-List ( $k, $v ) = Cat($array);
-say "Key is: $k, value is: $v";
-List ( $k, $v ) = Cat($array);
-say "Key is: $k, value is: $v";
-List ( $k, $v ) = Cat($array);
-say "Key is: $k, value is: $v";
-List ( $k, $v ) = Cat($array);
-say "Key is: $k, value is: $v";
-List ( $k, $v ) = Cat($array);
-say "Key is: $k, value is: $v";
-Function Cat( &$array )
-{
-	foreach( $array as $key => $value)
-		Yield return array($key, $value);
-}
-// Prints
-// Key is: One, value is: The
-// Key is: Two, value is: cat
-// Key is: Three, value is: and
-// Key is: Four, value is: the
-// Key is: Five, value is: dog
-// Yield is used to save the position in the array etc
-// then continue from that position the next time you
-// do a loop etc
-// So here it saves the position each time and gives
-// the next item in the array each time you call the
-// function
 </syntaxhighlight>
 [[Category:Core Function]]