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RubyGems

Table of Contents [hide]

1 listing available signals
2 Notes
3 Other snippets solutions
4 Code snippet resources
- 4.1 Working with strings

listing available signals ∞

It's a bit ugly, but it works.

exit
Signal.list.each { |i|
        print i
        puts ""
}

Notes ∞

Find the errata notes
- Print the errata notes
regex comments - 324

#!/usr/bin/env ruby

# = . so that GC#start is actually GC.start .. I don't know why.

ri --help for env settings

using ri in ruby - p 191

just rdoc to make html under doc/

rdoc --ri
rdoc --ri-site

p 213 has a nice example of RDoc use

p. 127 - IO - File, BasicSocket (763)

Kernel::

gets, open, print, printf, putc, puts, readline, readlines, test (p 516)

modes: read, write, etc.. p. 504

File.new - permissions .. 470

IO.foreach (131)

instead of tests, use rescue to handle IO exeptions, then the tests do things which cause exceptions! =)

132 - use << to put stuff into a file

151 - unit testing

desc - all items read from a file are _tainted_ -- p 399 safe level 1

159 - put the tests in

ruby test_x.rb (like test_desc.rb)

put test in a test/ directory

cd test
ruby ../test/test_x.rb

p 160 has some magic for this

108 - exceptions

re-raise
use $!

use array.at(#) because it's faster.

use array.new ?? not a=[] ??

or instead of killing a[0], I could arr.compact?

from array to string:

a = [1, 2, 3]
a * " "        => "1, 2, 3"

Using "*" is ".join"

I could build an array replacing the colour codes with ANSI colour codes, then return a string. What are the ansi codes? a.collect is a good way to do it (search/replace)

Is it possible to communicate between ruby threads by changing the type of an object?

distributed ruby safety? Can I use this for executing code on an untrusted client?

idea: erb + mediawiki ∞

optionally send arguments
optionally display the original code
optionally display the result
colourize the output or the code
http://onestepback.org/index.cgi/Tech/Ruby/Spotlight/Session.rdoc

cheap rsync ∞

Some quick code that was whipped up to duplicate rsync appending functionality.

http://eigenclass.org/hiki.rb?cheap+rsync

rio ∞

http://rio4ruby.com/rio/

Rio is a convenience class wrapping much of the functionality of IO, File, Dir, Pathname, FileUtils, Tempfile, StringIO, and OpenURI and uses Zlib, and CSV to extend that functionality using a simple consistent interface. Most of the instance methods of IO, File and Dir are simply forwarded to the appropriate handle to provide identical functionality. Rio also provides a "grande" interface that allows many application level IO tasks to be expressed succinctly.

Cool examples:

Iterate over the .rb files in a directory and its subdirectories:

rio('adir').all.files('*.rb') { |entrio| ... }

Iterate over only the files in a directory:

rio('adir').files { |entrio| ... }

Iterate over the entries in a directory:

rio('adir').entries { |entrio| ... }

See:

Code snippet resources ∞

https://web.archive.org/web/20070709214357/http://ruby.codezoo.com/ -- Was an application database.
http://www.erikveen.dds.nl/rubycodesnippets/

Working with strings ∞

pleac ruby > Strings

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