Spark Shen wrote:
> 2007/2/12, John W. Krahn <[EMAIL PROTECTED]>:
>>
>> Spark Shen wrote:
>>
>> > I am a fresh bird on perl. :-) Could gurus help me to understand this
>> > statement.
>> >
>> > *HTTP::Request->new(GET => $url);*
>> >
>> > How does perl parse the struct *GET => $url* here.
>>
>> (GET => $url) is a list of two elements. It could also be written as
>> ('GET',
>> $url) (The => operator is just a comma that also stringifies its
>> left-hand
>> operand.)
>
> So, it's just like the usage in hash array?
You mean like:
my %hash = ( one => 'two', three => 'four' );
That could also be written as:
my %hash = ( one => two => three => four => );
Or:
my %hash = ( 'one', 'two', 'three', 'four' );
Or:
my %hash = qw( one two three four );
> And IIRC function calls expect
> list context, so => is in list context?
Subroutine arguments are *usually* (by default) in list context. You can
change the context by using prototypes but it is not recommended. Using => or
, does not define context it is just used to separate the items in the list.
John
--
Perl isn't a toolbox, but a small machine shop where you can special-order
certain sorts of tools at low cost and in short order. -- Larry Wall
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