From: Junkone [mailto:junkone1 / gmail.com] 
# in rails, this is how it create the options for select box.
# <%= select(:rawdata, :symbol, %w{ AUD.USD-IDEALPRO-CASH EUR.GBP-
# IDEALPRO-CASH EUR.JPY-IDEALPRO-CASH EUR.USD-IDEALPRO-CASH GBP.USD-
# IDEALPRO-CASH USD.CAD-IDEALPRO-CASH USD.CHF-IDEALPRO-CASH }) %>
# what does the %w signify.

in ruby, i learn by reading ruby-doc, and do-ing it using irb ;)

a = %w{ AUD.USD-IDEALPRO-CASH EUR.GBP-IDEALPRO-CASH EUR.JPY-IDEALPRO-CASH EUR.USD-IDEALPRO-CASH GBP.USD-IDEALPRO-CASH USD.CAD-IDEALPRO-CASH USD.CHF-IDEALPRO-CASH }

a.class
#=> Array

p a
["AUD.USD-IDEALPRO-CASH", "EUR.GBP-IDEALPRO-CASH", "EUR.JPY-IDEALPRO-CASH", "EUR.USD-IDEALPRO-CASH", "GBP.USD-IDEALPRO-CASH", "USD.CAD-IDEALPRO-CASH", "USD.CHF-IDEALPRO-CASH"]

some more examples (note, i can change the delimiters)

a=%w[this is a test]
#=> ["this", "is", "a", "test"]

a=%w(1 2 3 4)
#=> ["1", "2", "3", "4"]

a=%w<my name is bot\ pena>
#=> ["my", "name", "is", "bot pena"]

kind regards -botp