The Perl range operator '..' is often used to quickly fill in arrays like so: @arr = ( 1..9 );. Unfortunately that only works when the left argument is smaller than the right argument and you can only make an array with ascending values. But what if you want descending values?
@array = ( 7..1 ); # returns an empty array
@array = map { $_ * -1 } ( -7..-1 );
# When generating the array you are technically going
# up from a large negative to a small negative.
# Then, you multiply each value by -1 and assign
# to @array. Works like a charm.
-
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.
|
