If you have a hash reference $foo, then the hash is %{$foo}. This is all need to you know, if you know how to use a hash.

%foo       %{$bar}
@foo{...}  @{$bar}{...}
$foo{...}  ${$bar}{...}
[download]

If the reference is in a normal scalar variable, you can leave out the first set of {}, so you get %$bar, @$bar and $$bar. As a special case, $$bar{...} can be written as $bar->{...}. This arrow notation is the preferred method.

---

Perl 6 changes:

• The sigil no longer changes with use. A hash gets % in all three cases, instead of %, @ or $, depending on how it is used.
• A hash returns a list of pairs in list context.
• Sorting by something only requires specifying that something: sort { .key }, %hash, sort { .value }, %hash.
• You can use the reference as if it were a normal hash, and Perl 6 automatically dereferences it for you. In list context, though, you have to dereference explicitly with %$foo, or specify explicitly that you want a list of pairs: $foo.pairs.
• Arrows are now dots, and in the case of hash references, can even be left out entirely.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.