Command line currency convertor, just copy and paste. I named mine 'coin'. Make sure you have Ruby, Rubygems and Hpricot (gem install hpricot). e.g. ~$ coin 100 eur usd 158.3300 Uses the site xurrency.com.

ruby

1 568 posted 15 years ago by plexus

Ruby remove non-word characters

ruby

1 478 posted 15 years ago by inkdeep

Ruby spaces to dashes

ruby

2 469 posted 15 years ago by inkdeep

Ruby file_duplication

ruby

1 499 posted 15 years ago by neil

Ruby initialized_by_hash

provides a tidy way to add initialization by hash to new classes

ruby

1 405 posted 15 years ago by neil

Ruby Irb power tricks with Wirble & Utility-Belt

Note: most of these will be available to the shell and Rails' console too.

ruby

2 613 posted 15 years ago by cczona

Ruby Haml 'nesting within a tag' error

"When using haml, an HTML tag is represented using %tagname, but in the case of an HTML tag with attributes, the representation is %tagname{:attribute => value}. It turns out there must be no whitespace between %tagname and {:attribute => value}....

ruby

1 487 posted 15 years ago by cczona

Ruby order/format of params in method definition

See also p. 348 ("Invoking a Method") of Pickaxe 2nd edition

ruby

1 511 posted 15 years ago by cczona

Ruby What version of Ruby and Rails is this using?

ruby

1 486 posted 15 years ago by cczona

Ruby Ruby heredoc tricks

Following a

ruby

2 503 posted 15 years ago by cczona

Ruby Use regex to match a Ruby substring, and reference it like an index

ruby

1 727 posted 15 years ago by cczona

Ruby optimize Ruby memory usage by avoiding string accumulation

ruby

1 431 posted 15 years ago by cczona

Ruby make Ruby strings behave like files

This is handy for testing, when you need to simulate an open file or open URI. Why, and the Pickaxe book, have better examples

ruby

1 532 posted 15 years ago by cczona

Ruby Execute arbitrary code with different level of error messaging

You can turn off warnings for a section of your code by setting $VERBOSE to nil. Even better is to codify this in a method. Since this method takes a block as its parameter, you can now pass it arbitrary chunks of code to execute without warnings.