Programming Forums > Script Programming > Ruby

Jessehk · Jul 9th, 2006, 3:45 PM

Quote:

Originally Posted by Dietrich

I found this simple example:

# an array of the 50 states

states50 = [
  'Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 
  'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 
  'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 
  'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 
  'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 
  'Nebraska', 'Nevada', 'New_Hampshire', 'New_Jersey', 'New_Mexico',
  'New_York', 'North_Carolina', 'North_Dakota', 'Ohio', 'Oklahoma', 
  'Oregon', 'Pennsylvania', 'Rhode_Island', 'South_Carolina', 
  'South_Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 
  'Virginia', 'Washington', 'West_Virginia', 'Wisconsin', 'Wyoming'
]

puts states50.length()  # () is optional  --> 50

puts states50  # displays 50 states, one per line

def find(arr, value)
  for i in 0...arr.length
    return i if value == arr[i]
  end
end

puts find(states50, "Iowa")  # found at index --> 14

(Toggle Plain Text)

puts states50.index("Iowa") #=> 14

Dietrich · Jul 9th, 2006, 9:07 PM

(Toggle Plain Text)

puts states50.index("Iowa") #=> 14

Thanks, I thought there should be a find-index function builtin into Ruby.

Dietrich · Jul 9th, 2006, 9:13 PM

(Toggle Plain Text)

class Symbol
    def to_proc
        lambda { |obj, *args| obj.send(self, *args) }
    end
end

Is this what some folks refer to as metaprogramming?

Jessehk · Jul 9th, 2006, 11:07 PM

Quote:

Is this what some folks refer to as metaprogramming?

Not quite. I actually don't know about metaprogamming in Ruby, though this tutorial might help: http://www.devsource.com/article2/0,1895,1928561,00.asp

Dietrich · Jul 27th, 2006, 8:50 AM

I found a nice collection of Ruby code snippets here:
http://textsnippets.com/tag/ruby

Jul 9th, 2006, 9:07 PM	#32
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	(Toggle Plain Text) puts states50.index("Iowa") #=> 14 puts states50.index("Iowa") #=> 14 Thanks, I thought there should be a find-index function builtin into Ruby. __________________ I looked it up on the Intergnats!

Jul 9th, 2006, 9:13 PM	#33
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	(Toggle Plain Text) class Symbol def to_proc lambda { \|obj, args\| obj.send(self, args) } end end class Symbol def to_proc lambda { \|obj, args\| obj.send(self, args) } end end Is this what some folks refer to as metaprogramming? __________________ I looked it up on the Intergnats!

Jul 27th, 2006, 8:50 AM	#35
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	I found a nice collection of Ruby code snippets here: http://textsnippets.com/tag/ruby __________________ I looked it up on the Intergnats!

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Programming Forums > Script Programming > Ruby

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