References are reference :) a multidimensional hash stores references, a hash of arrays stores array references as values(hash value) associated with hash-keys, and the same ones refers to the same value
$ perl -le " %F =(1, [41] ); $F{2}= $F{1}; print for %F; "
1
ARRAY(0x3f9074)
2
ARRAY(0x3f9074)
value of 1 is same as 2, same reference ARRAY(0x3f9074), same array, so $F{2}[0]++ makes $F{1}[0] 42, because $F{1} and $F{2} refer to the same array
See Tutorals: References, and perlref
-
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.
|