I don't think that answer is correct. I know that tr does not interpolate, the patterns are defined at compile time according to the camel book. But the book says that you can put variables in the tr statement if you then use eval to execute the statement. the example in the book (p.76) is  eval "tr/$oldlist/$newlist/;" This does not work. this two step however does work:

    
    # this next two step works..... 
    $xtr = "$bad =~ tr/$card//;" ;
    $kards = eval "$xtr;";
        print "xtr kards = $kards from eval cmd : $xtr\n";
    #output: xtr kards = 5 from eval cmd : AKQJT98765432KKKK =~ tr/K//
+;
[download]

---

---

• 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.