Dereferencing a hash? I don't see it in perlref, but it is in perlreftut.
If you're talking about examples of dereferencing hash references, perlref does show a lot of them. To name a few (comments are mine)...,
....you can replace the identifier with a simple scalar variable....
...
$$arrayref[0] = "January";
$$hashref{"KEY"} = "VALUE"; # deref the hash, assign a key
&$coderef(1,2,3);
...
....you can replace the identifier with a BLOCK returning a reference....
...
${$arrayref}[0] = "January";
${$hashref}{"KEY"} = "VALUE"; # same as above, differet syntax
&{$coderef}(1,2,3);
...
.... As a form of syntactic sugar....
$arrayref->[0] = "January";
$hashref->{"KEY"} = "VALUE"; # still the same, witha arrow operator
$coderef->(1,2,3);
So does perlreftut, I suppose. Talking about words, that doc doesn't even have a single word of "dereference" or "dereferencing", though it doesn't matter to me. But I didn't know if perlreftut talked about dereferencing a hash, or any other docs. :-)
Open source softwares? Share and enjoy. Make profit from them if you can. Yet, share and enjoy!
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|