Editing Variadic function (section)

===In Raku===
In [[Raku (programming language)|Raku]], the type of parameters that create variadic functions are known as ''slurpy'' array parameters and they're classified into three groups:

====Flattened slurpy====
These parameters are declared with a single asterisk (<code>*</code>) and they flatten arguments by dissolving one or more layers of elements that can be iterated over (i.e, [https://docs.perl6.org/type/Iterable Iterables]).

<syntaxhighlight lang="perl6">
sub foo($a, $b, *@args) {
    say @args.perl;
}

foo(1, 2)                  # []
foo(1, 2, 3)               # [3]
foo(1, 2, 3, "hello")      # [3 "hello"]
foo(1, 2, 3, [4, 5], [6]); # [3, 4, 5, 6]
</syntaxhighlight>

====Unflattened slurpy====
These parameters are declared with two asterisks (<code>**</code>) and they do not flatten any iterable arguments within the list, but keep the arguments more or less as-is:

<syntaxhighlight lang="perl6">
sub bar($a, $b, **@args) {
    say @args.perl;
}

bar(1, 2);                 # []
bar(1, 2, 3);              # [3]
bar(1, 2, 3, "hello");     # [3 "hello"]
bar(1, 2, 3, [4, 5], [6]); # [3, [4, 5], [6]]
</syntaxhighlight>

====Contextual slurpy====
These parameters are declared with a plus (<code>+</code>) sign and they apply the ''"[https://docs.perl6.org/language/functions#Slurpy_conventions single argument rule]"'', which decides how to handle the slurpy argument based upon context. Simply put, if only a single argument is passed and that argument is iterable, that argument is used to fill the slurpy parameter array. In any other case, <code>+@</code> works like <code>**@</code> (i.e., unflattened slurpy).

<syntaxhighlight lang="perl6">
sub zaz($a, $b, +@args) {
    say @args.perl;
}

zaz(1, 2);                 # []
zaz(1, 2, 3);              # [3]
zaz(1, 2, 3, "hello");     # [3 "hello"]
zaz(1, 2, [4, 5]);         # [4, 5], single argument fills up array
zaz(1, 2, 3, [4, 5]);      # [3, [4, 5]], behaving as **@
zaz(1, 2, 3, [4, 5], [6]); # [3, [4, 5], [6]], behaving as **@
</syntaxhighlight>