Perl sigils的一个有用的助记符是：
> $ calar
> @rray
>％灰分
Matt Trout写了一个伟大的评论关于Perl sigils blog.fogus.me有用的，所以有粘贴下面：
Actually,perl sigils don’t denote variable type – they denote conjugation – $ is ‘the’,@ is
‘these’,% is ‘map of’ or so – variable type is denoted via [] or {}. You can see this with:
my $foo = 'foo';
my @foo = ('zero','one','two');
my $second_foo = $foo[1];
my @first_and_third_foos = @foo[0,2];
my %foo = (key1 => 'value1',key2 => 'value2',key3 => 'value3');
my $key2_foo = $foo{key2};
my ($key1_foo,$key3_foo) = @foo{'key1','key3'};
so looking at the sigil when skimming perl code tells you what you’re going to -get- rather
than what you’re operating on,pretty much.
This is,admittedly,really confusing until you get used to it,but once you -are- used to it
it can be an extremely useful tool for absorbing information while skimming code.
You’re still perfectly entitled to hate it,of course,but it’s an interesting concept and I
figure you might prefer to hate what’s -actually- going on rather than what you thought was
going on
（编辑：李大同）
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