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Top Forums Shell Programming and Scripting How to replace the last pattern using sed? Post 302509109 by kurumi on Tuesday 29th of March 2011 10:39:57 PM
Old 03-29-2011
No sed, but Ruby(1.9+)

Code:
$ ruby -0777  -ne 'i=$_.rindex("AAA")-1; puts $_[0..i-1] + "\nEEEEE" + $_[i+"AAA".size+1..-1]' file
AAAaaa
BBBbbb
CCCccc
EEEEEeee
DDDddd

 

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RUBY-BUILD(1)															     RUBY-BUILD(1)

NAME
ruby-build - compile and install Rubies SYNOPSIS
ruby-build [-v|--verbose] [-k|--keep] definition prefix ruby-build --definitions ruby-build --version ruby-build [-h|--help] rbenv install [-k|--keep] definition DESCRIPTION
ruby-build provides a simple way to compile and install different versions of Ruby on UNIX-like systems. ruby-build downloads, builds and installs the Ruby version specified in a definition into a prefix directory. Definitions can be chosen from the list of installed definitions or by specifying a file path for a definition. rbenv(1) users can also use the provided rbenv install command, which installs Rubies into the rbenv directory. OPTIONS
--definitions List available definitions. -k, --keep Don't delete source code after installation. -v, --verbose Display compiler messages on standard output. --version Show ruby-build version and exit. -h, --help Show usage information and exit. EXAMPLES
Install Ruby 1.9.3 (MRI, patch level 0) to ~/rubies/mri-1.9.3 $ ruby-build 1.9.3-p0 ~/rubies/mri-1.9.3 Install Ruby Enterprise Edition 1.8.7 (patch level 2011.03) for rbenv(1): $ rbenv install ree-1.8.7-2011.03 Install Ruby from a custom definition into ~/your-ruby: $ rbenv install /path/to/your/own/ruby/definition ~/your-ruby ENVIRONMENT
CC Sets the path to the C compiler. CONFIGURE_OPTS Options that are passed to configure when building a Ruby. MAKE_OPTS Options that are passed to make when building a Ruby. MAKEOPTS Used instead of MAKE_OPTS when MAKE_OPTS is not defined. TMPDIR Sets the location where ruby-build stores temporary files. RUBY_BUILD_BUILD_PATH Sets the location in which sources are downloaded and built. AUTHORS
ruby-build is developed by Sam Stephenson <sam@37signals.com>. This man page was written for the Debian GNU/Linux distribution by Sebastian Boehm <sebastian@sometimesfood.org> but may be used by others. SEE ALSO
rbenv(1) June 2012 RUBY-BUILD(1)
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