http://jamie.homelinux.org Biometrics, Signal Processing, Photography and other stuff I'm interested in. Sun, 15 Nov 2009 23:37:14 +0000 http://backend.userland.com/rss092 en alias min='ruby -e "ARGF.select{|e| e =~ /^[+-]?\d+[.]?\d*/ }.map{|e| e.to_f }.min"' alias max='ruby -e "ARGF.select{|e| e =~ /^[+-]?\d+[.]?\d*/ }.map{|e| e.to_f }.max"' Then you can simply do [user@host]# echo "1" >> numbers.txt [user@host]# echo "5" >> numbers.txt [user@host]# cat numbers.txt | min 1 http://jamie.homelinux.org/bash-using-ruby-for-min-and-max/ Should be easy but it's not... like some pretty basic things in windows this one actually requires a registry edit in order to use the fonts that are already installed on your system for your command prompt. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Console\TrueTypeFont There you will see a string value (0 => "Lucida Console") or ... http://jamie.homelinux.org/changing-the-font-in-windows-command-prompt/ This one is for no one else but me :) model.assignment_parameters_override = {"pt_assignment_config" => "new"}.to_yaml http://jamie.homelinux.org/new-pt-assignment/ String manipulation has historically been a major shortfalling of the C++ language, or at least it was until boost came along. Something as simple as spliting a string up on a delimeter is now made so much easier thanks to the boost::tokenizer and boost string algorithms. #include <iostream> #include <string> #include <boost/foreach.hpp> #include ... http://jamie.homelinux.org/boost-tokenize-for-the-win/ When I upgraded to Ubuntu Intrepid Ibex I installed it clean on a new harddrive that I installed alongside my old Hardy hard drive (that was totally unintentional - but hilarious). I then mounted the old hard drive, which was much bigger, via fstab so that I could have access ... http://jamie.homelinux.org/linux-fstab-and-uuids/ Have been wondering for a while now how to force the svn command line to resolve conflicts, didn't really see anything on google until I came across this: http://svnbook.red-bean.com/en/1.5/svn.ref.svn.html Turns out there is a standard switch which I hadn't found! The accept switch "specifies an action for automatic conflict resolution. Possible ... http://jamie.homelinux.org/svn-command-line/ Wow that a heck of a post title isn't it... well the up shoot of this post is to point out the non-intuitive (to me anyway) difference in the precedence of the two AND operators in ruby. The operator '&&' has a much higher precedence than 'and', more importantly 'and' ... http://jamie.homelinux.org/ruby-operator-precedence-of-and-and/ Stolen from Dale's blog... reposted here for my own reference. Also this link is good for a reference on executing shell commands from ruby. I needed to knock up a Ruby script recently that orchestrated some external processes using backticks. However something was going wrong and I need to temporarily peek ... http://jamie.homelinux.org/debugging-ruby-backticks/ Somewhere way back in the history of our project someone (read Partro) decided that we didn’t need a pesky little data folder anymore and decided that it should be deleted. Turns out he was pretty much right because it wasn’t until about 200 revisions later that I noted its absence, ... http://jamie.homelinux.org/svn-undelete-of-a-directory-2/ Just coz I always forget them, three good ways to load files into memory in ruby File.open(filename, 'r') do |f| f.readlines end IO.readlines(filename).each do |line| end lines = IO.read(filename).split("\n") thanks to Partro for the outline along with the following three points File.open gives you a file handle you can stream from while the IO methods ... http://jamie.homelinux.org/ruby-file-loading/