Today I devised a little script to generate Ruby examples showing code and output.
% rubydemo '[1,2,3].inject {|m,o|m+o}'
[1,2,3].inject {|m,o|m+o} #=> 6
% rubydemo 1/0
1/0 #=> #<ZeroDivisionError: divided by 0>Here’s the script I used for generation. (It could have been one line if I didn’t care so much about exception formatting.)
#!/usr/bin/env ruby
print ARGV.
Auto-loading Ruby Code
An incredibly useful technique when using Ruby is to auto-load at start-up a custom library written for exactly that purpose. This is easy to accomplish with a couple of environment variables, but I see very little discussion on the subject. Thus, I’ve written a nice summary of how to go about setting this up.
The secret...
