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Top Forums UNIX for Beginners Questions & Answers Rename files based on simple text file Post 302990023 by Oortone on Friday 20th of January 2017 02:57:37 PM
Old 01-20-2017
Quote:
Originally Posted by RudiC
Not sure I fully understand.
You want to rename several ".wav" files in a directory - not more than 30, so definitely NOT 3 digits - to new names without the ".wav" extension based on the contents of a text file indexed by the leading number in the ".wav" file name?

Any attempts / ideas / thoughts from your side? Any preferred tools?
Sorry for late answer, been busy.

Yes, I think you got it just right.
The file with index 1 get's it name from line 1 in the document.
The file with index 23 get's it name from line 23 in the document.
Each line begins with a digit already and these should in almost all cases coincide with the line number. No file exceeds 99 lines.

I read the manual for grep and also had a look at commands like sed and I know I can pipe the output of one command to the input of another command but I can't figure out how to do that in this case. In pseudocode it would be something like:
Code:
Start
n = 1
While not EOF in document.txt
A = contens of line n in document.txt
rename file n*.wav to A
end while

If it's possible I would rather do this with a simple commad in Unix rather than build a script. It's not meant to be advanced in any way, handling exceptions and things like that. If it works 8 times out of 10 I'm fine.

---------- Post updated at 08:57 PM ---------- Previous update was at 08:47 PM ----------

In this post there's a similar question but I don't have the corresponding filename in the document so i can't use that although it's quite similar.
Rename files based on name in text file
 

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MouseX::NativeTraits::Str(3pm)				User Contributed Perl Documentation			    MouseX::NativeTraits::Str(3pm)

NAME
MouseX::NativeTraits::Str - Helper trait for Str attributes SYNOPSIS
package MyHomePage; use Mouse; has 'text' => ( traits => ['String'], is => 'rw', isa => 'Str', default => q{}, handles => { add_text => 'append', replace_text => 'replace', }, ); my $page = MyHomePage->new(); $page->add_text("foo"); # same as $page->text($page->text . "foo"); DESCRIPTION
This module provides a simple string attribute, to which mutating string operations can be applied more easily (no need to make an lvalue attribute metaclass or use temporary variables). Additional methods are provided for completion. PROVIDED METHODS
These methods are implemented in MouseX::NativeTraits::MethodProvider::Str. It is important to note that all those methods do in place modification of the value stored in the attribute. inc Increments the value stored in this slot using the magical string autoincrement operator. Note that Perl doesn't provide analogous behavior in "--", so "dec" is not available. append($string) Append a string, like ".=". prepend($string) Prepend a string. replace($pattern, $replacement) Performs a regexp substitution ("s" in perlop). A code references will be accepted for the replacement, causing the regexp to be modified with a single "e". "/smxi" can be applied using the "qr" operator. replace($pattern, $replacement) Performs a regexp substitution ("s" in perlop) with the "g" flag. A code references will be accepted for the replacement, causing the regexp to be modified with a single "e". "/smxi" can be applied using the "qr" operator. match($pattern) Like "replace" but without the replacement. Provided mostly for completeness. chop "chop" in perlfunc chomp "chomp" in perlfunc clear Sets the string to the empty string (not the value passed to "default"). length "length" in perlfunc substr "substr" in perlfunc. We go to some lengths to match the different functionality based on "substr"'s arity. METHODS
meta method_provider_class helper_type SEE ALSO
MouseX::NativeTraits perl v5.14.2 2011-12-04 MouseX::NativeTraits::Str(3pm)
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