tr/// (sometimes spelled y///, especially in code golf) works on characters specifically. m// (sometimes spelled //) works on regular expression matches, which may concern one or more characters (or in special cases zero, such as split //, $foo;).
Perl takes text very seriously. There is a load to know about processing text in Perl, but the basics are pretty quick to grasp. The full story is not complete without at least these manual pages, although for this specific topic the first few should suffice.:
You might hope you never need to read perlebcdic, but there's that too.
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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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>
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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).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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