Difference between revisions of "S2 Cookbook: Arrays"
From Dreamwidth Notes
Foxfirefey (Talk | contribs) (→Get a random array item) |
Foxfirefey (Talk | contribs) m (→Get a random array item) |
||
Line 72: | Line 72: | ||
<syntaxhighlight lang="s2"> | <syntaxhighlight lang="s2"> | ||
var string pick = $items[rand(0, size $items - 1 )]; | var string pick = $items[rand(0, size $items - 1 )]; | ||
− | <syntaxhighlight> | + | </syntaxhighlight> |
== Reverse an array == | == Reverse an array == |
Latest revision as of 19:03, 10 August 2010
Contents
Access an item of an array or associative array
var string[] items = ["sock", "pants", "shirt", "skirt", "scarf"]; var string{} fruits = {"apple" => "red", "lemon" => "yellow", "grape" => "purple"}; ## Accessing an array # sock print $items[0]; # pants print $items[1]; ## Accessing an associative array # red print $fruits{"apple"}; # yellow print $fruits{"lemon"}; # purple print $fruits{"grape"};
Cycle through all the items of an array or associative array
Please see the recipes:
Get the number of items in an array or associative array
Use the size
keyword:
var string[] items = ["sock", "pants", "shirt", "skirt", "scarf"]; var int items_length = size $items; var string{} fruits = {"apple" => "red", "lemon" => "yellow", "grape" => "purple"}; var int fruits_length = size $fruits; # Items: 5; Fruits: 3 print "Items: $items_length; Fruits: $fruits_length";
Get the last item of an array
When you use a negative number as the index to an array, the count starts from the end of the array:
var string[] items = ["sock", "pants", "shirt", "skirt", "scarf"]; # scarf print $items[-1]; # skirt print $items[-2];
Get a random array item
Use the rand
function to get an index within the array's range:
var string[] items = ["sock", "pants", "shirt", "skirt", "scarf"]; # goes from 0 to size-1 in indexing var int random = rand(0, size $items - 1 ); var string pick = $items[$random]; print "Pick: $pick (item $random)";
You can even do it entirely inline:
var string pick = $items[rand(0, size $items - 1 )];
Reverse an array
Use the reverse
keyword to reverse an array:
var string[] items = ["sock", "pants", "shirt", "skirt", "scarf"]; # scarf, skirt, shirt, pants, sock, foreach var string item ( reverse $items ) { print "$item, "; }