All of the above comments are valid. But if one: a) has used symbolic refs successfully in other situations; b) does not recognize that symbolic refs find only package variables; c) does not recognize that "my" variables are lexical; d) uses "my" variables frequently in subroutines to avoid the possibility of duplicate variable names; and e) does not recognize that the use of such constructs in a subroutine are "unsafe", "non-robust", "non-versatile", and difficult to maintain; then one can get very frustrated trying to figure out why something isn't working as expected. Some or all of those things applied to me when I wrote that code initially 2-3 years ago. To someone who may be new to Perl, or is not experienced in some of these things, the distinction may boil down to a difference between using "my" and "local" without understanding what is under the covers. Thanks for your comments. I was not familar with the "map" function mentioned above so I have something new to learn about. I rewrote the subroutine in the original snippet long ago by passing a list of array refs rather than the letters so the original snippet is only of value to others if this discussion helps them to avoid the pitfalls mentioned.
-
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.
|
