G'day vinoth.ree,
All of these issues are explained in perlop - Range Operators.
Quickly pointing you to the relevant parts:
-
"Binary ".." is the range operator, which is really two different operators depending on the context. In list context, it returns ..." (doco mirrors your expectations)
-
Two paragraphs down:
"In scalar context, ".." returns ..."
(doco explains how a false value, i.e. your 'empty string', is returned)
-
Two more paragraphs down:
"If either operand of scalar ".." is a constant expression, that operand is considered true if it is equal (==) to the current input line number (the $. variable)." (explanation for your "uninitialized value $." warning)
-
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.
|
