Watch out if your expression is surrounded by parentheses, though, because map will think they enclose all of its arguments. You either need two sets of parens (one around your expression, and one around all of map's args), or you don't need any.
You can also get away with the single set of parens if you disambiguate it with +:
@out = map +( ... ), @in;
I find myself using this trick all over the place, not only with map and grep but with, e.g. print:
print +( $foo ? $bar : $baz ) . $quux;
Without the + above, the last expression would result in the printing of only the value of the expression in the parens. (Although, if warnings are on, perl will say something about interpreting print (...) as a function.)
-
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.
|