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Top Forums Shell Programming and Scripting No. of underscores in a file name Post 302853195 by alister on Friday 13th of September 2013 11:29:40 AM
Old 09-13-2013
Quote:
Originally Posted by wisecracker
Code:
text="a_b_c"; count=0; for n in $( seq 0 1 ${#text} ); do if [ "${text:$n:1}" == "_" ]; then count=$[ ( $count + 1 ) ]; fi; done; echo""; echo "Underscores = $count"

If your shell supports substring expansion (${text:$n:1}), then you can probably replace all of that with a much simpler, pattern substitution alternative:
Code:
u=${text//[!_]/}
echo Underscores = ${#u}

Regards,
Alister
This User Gave Thanks to alister For This Post:
 

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MP3ROASTER(1)						User Contributed Perl Documentation					     MP3ROASTER(1)

NAME
mp3roaster - A Perl hack for burning audio CDs out of MP3/OGG/FLAC/WAVs SYNOPSIS
mp3roaster [OPTION]... "MP3/OGG/FLAC/WAV files" DESCRIPTION
mp3roaster A Perl hack for burning audio CDs out of MP3, OGG VORBIS and FLAC files. The main highlights of this application are an easy to use command line syntax and automatic volume leveling support for best audio CD quality. ENVIRONMENT
MP3Roaster should run on all Unix like operating systems which have Perl and wodim installed. It has been developed on Debian GNU/Linux. OPTIONS
All options have been imported, now we should add specific descriptions for each option. -D, --dev CDR device to use -s, --speed Burn speed -d, --dummy Burn with laser off -a, --dao Burn in disk-at-once (DAO) mode for gapless recording -b, --burnfree Turn on Buffer Underrun Free writing -t, --temp Temporary directory -m, --mp3dec MP3 decoder to use -l, --lowercase Convert filenames to lowercase -S, --spaces Replace spaces with underscores -B, --brackets Replace brackets with underscores -q, --quotes Replace quotes with underscores -Q, --questions Replace questionmarks with underscores -n, --normalize Normalize WAV files before burning -N, --no-normalize Don't normalize WAV files, even if --normalize is specified (either as a command line argument or in the configuratino file) -y, --no-confirm Don't prompt for confirmation. -w, --wodim-opts Specify options to pass to Wodim for CD recording -v, --verbose Enable verbose output -h, --help Show the help screen -V, --version Show version and infos RETURN VALUE
mp3roaster returns 0 on success, 1 on error. DIAGNOSTICS
This has to be written yet. EXAMPLES
Once correctly configured MP3Roaster is very easy to use, just launch it from the command line with a bunch of compressed audio files, here is a short example: % mp3roaster "Root Dance.mp3" Free Software.flac bar.ogg Decoded.wav This will burn Root Dance.mp3, Free Software.flac bar.ogg and Decoded.wav on your audio CD preserving the song order as specified on the command line. Here is another example showing the usage of command line options like the dummy option: % mp3roaster -d "Root Dance.mp3" Free Software.flac bar.ogg Decoded.wav This will do the same job as above but with the laser of your CD writer turned off, so no data will be really written. You see MP3Roaster is really easy to use, this was one of my main goals while I've written the code: Keep it simple ;) FILES
MP3Roaster can be configured through a system wide and a personal configuration file. When you run MP3Roaster it will first check for your personal configuration file in your home directory, if no one is found it will fall-back to the system wide configuration files placed in /etc. By default MP3Roaster installs the configuration files in /etc/mp3roaster, but there are other possible file locations for the configuration file: . System wide configuration in /etc . /etc/mp3roaster/mp3roasterrc (DEFAULT) . /etc/mp3roasterrc . Personal configuration in your home . ~/.mp3roaster/mp3roasterrc . ~/.mp3roasterrc So if you want to have personal MP3Roaster configuration file just copy the system wide configuration file to your home directory and edit it. CAVEHEATS
None actually. BUGS
There may be some minor troubles regarding file names, feel free to report any bugs you may encounter (In fact you shouldn't). NOTES
There are currrently no special notes. SEE ALSO
wodim. AUTHOR
Ivo Marino <eim@users.sourceforge.net> Lorenzo Taylor <lorenzo1@users.sourceforge.net> HISTORY
Take a look at the ChangeLog for now. perl v5.14.2 2012-01-10 MP3ROASTER(1)
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