Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
The idiom to execute perl statements on and print the result of each line of a file is
perl -pe 'perl_statements' < file
some_command | perl -pe 'perl_statements'

each line is stored in $_ on which perl_statements act.

Here you want to print all the files in the $HOME/Mail directory. An all perl solution is:
   map{ -f  $_  and print "$_ " } <$ENV{HOME}/MAIL/*>

Some people consider using map on empty context is bad form. I don't. They would propose instead:   for(<$ENV{HOME}/MAIL/*>) {  -f  $_  and print "$_ " }
  -f  $_  and print "$_ " for  <$ENV{HOME}/MAIL/*>


-- stefp

In reply to Re: Another Q about piping Perl by stefp
in thread Another Q about piping Perl by Elvis

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • 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 or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (2)
As of 2022-05-22 12:11 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (80 votes). Check out past polls.