You're asking whether an assignment then a possible re-assignment is 'better' than an if-then-else with a single assignment. Yes?
My question to you (building on another AM's) is what your criteria is? Is it readability and maintainability? Or, is it speed? In this trivial case, speed is pretty much a wash. Were you to be doing multiple assignments, however, it might be better to use A than B. In either case, the difference in CPU time per branch is minimal and not a factor.
As a coder who more often than not gets down to assembly, I'm used to B, and I think most coders are. As long as you don't need to make a flowchart for Management, B is every bit as usable as A from the maintainability standpoint.
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>
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
Want more info? How to link
or How to display code and escape characters
are good places to start.