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Abigail skribis 2005-10-17 9:34 (+0200):
> > In both cases I am talking about the %hash<<key>> syntax (per
> > ASCII-transliterated version of the operator).
> Ah, that one. I think that this week[*] they are going for:
> %hash<key>
Single angle brackets are for word lists, similar to Perl 5's qw//
operator.
<foo bar baz>
is just an easy way to write
('foo', 'bar', 'baz')
Double angle brackets are also for word lists. Symmetric with quotes,
these interpolate (expand) variables. << and >> can be written as « and
» if you wish. I prefer the ASCII version.
<<foo bar $quux>>
is just an easy way to write
"foo bar $quux".split
# not necessarily ("foo", "bar", "$quux")
Hashes are subscripted with the .{} method:
%hash.{$key}
The . can be left out in almost all cases, resulting in just
%hash{key}
However, if one chooses to leave out the dot, whitespace is no longer
allowed, while with the dot, you may have whitespace on its LHS:
%hash{key}
%hash.{key}
%hash .{key}
%hash<key1 key2 ... keyn> and %hash<<key1 key2 ... keyn>> are just
shortcuts: %hash<> is a shortcut for %hash{<>}, and %hash<<>> is a
shortcut for %hash{<<>>}. (Here too, the actual operators are .<> and
.<<>>, and the dot is optional.)
> [*] Actually, that was last week. I've no idea what this weeks syntax
> is going to be.
This joke is no longer funny, as the design is currently so stable that
basic syntax no longer changes every week.
Juerd
--
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