The linked slidedeck holds many tips, of which I list the most interesting to me below

DATA and END

The __END__ keyword tells Ruby where a file ends – but you don't have to stop there. Any text you add after it is accessible via the DATA object.

Running the attached example file data.rb prints:

DATA is a File object to everything in the current file after "__END__"

No braces needed for 'special variables'

@instance, @@class, $global = [ 'instance', 'class', 'global' ]
puts "#@instance, #@@class, #$global"

ring = [1, 2, 3].cycle
p ring.take(5)
# => [1, 2, 3, 1, 2]

I haven't made it beyond trick #44, it was just too much for now.
But you, go and add your favourites!

Dominik Schöler

Last edit

Over 11 years ago

Attachments

License

Source code in this card is licensed under the MIT License.

To check which rubygems versions your different rbenv rubys are using, you can use this small bash script:

for i in $(rbenv versions --bare); do rbenv shell "${i}"; echo -n "ruby ${i} has gem version: "; gem -v; done

``...

I followed this nice guide Connecting to MSSQL with Ruby on Ubuntu - lambie.org until I ran in the following errors:

irb(main):001:0> require "dbi"; ...

Posted by Dominik Schöler to makandra dev (2012-10-11 19:01)