Re: How to do a recursive rename ?

you loop on the files matched by the glob.
So for each filename the s/// calculates the new filename $new

for ( glob "*.abc" ) {
  ($new = $_) =~ s/\.abc$/.edf/; 
   rename $_, $new or warn "can't rename '$_' to '$new': !";
}
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Thnaks people to indicate me I could edit an already sent nodelet.

Note 1: On Unix at least, rename will never delete a file. But renaming a file to a clear screen string can be almost as bad.

Note 2: The camel3 p 154 explains better than I could the idiom ($a = $b) =~ s///

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RE: Re: How to do a recursive rename ? by Adam (Vicar) on Sep 12, 2000 at 03:59 UTC
Use this with caution. rename will destroy any file that gets in its way. Also, you don't need that =~ in front of the s///: `for ( glob ".abc" ) { my $old = $_; s/\.abc$/.edf/; rename $old, $_ or warn "can't rename '$old' to '$_'"; }` [download] Update: Ok, I looked again at stefp's code and I see why that =~ was there. If you use that method, don't forget to declare $new somewhere... (you are using `strict`, aren't you?) and of course, you might want to add some code to make sure rename isn't going to delete anything. maybe: `for( glob ".abc" ) { my $new = $_; my $ok = 1; substr $new, 0, -3, "edf"; if( -e $new ) { warn "file '$new' already exists. Do you want to replace?\n"; while(<STDIN>) { last if /[yY][eEsS]{0,1}/; $ok = 0, last if /[nN][oO]{0,1}/; warn "Yes or No?\r"; } } rename $_, $new or warn "can't rename '$_' to '$new'\n " if $ok; }` [download] That is untested...	[reply] [d/l] [select]

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RE: Re: How to do a recursive rename ?
by Adam (Vicar) on Sep 12, 2000 at 03:59 UTC

rename

for ( glob "*.abc" ) 
{
   my $old = $_;
   s/\.abc$/.edf/; 
   rename $old, $_ or warn "can't rename '$old' to '$_'";
}
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stefp

strict

rename

for( glob "*.abc" )
{
    my $new = $_;
    my $ok = 1;
    substr $new, 0, -3, "edf";
    if( -e $new )
    {
        warn "file '$new' already exists. Do you want to replace?\n";
        while(<STDIN>)
        {
            last if /[yY][eEsS]{0,1}/;
            $ok = 0, last if /[nN][oO]{0,1}/;
            warn "Yes or No?\r";
        }
    }
    
    rename $_, $new or warn "can't rename '$_' to '$new'\n " if $ok;
}
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