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Showing posts from July, 2012

Creating Incrementing Variables in Code with Ruby

I had a project I was working on that required me to assign values to incremental variables from an array.  A quick solution to the problem, using very little meta-coding is below in its most basic form.  One class was my data or value class.  It held the incremental variables I wanted to assign to.  Here It's called, "Foo".  The class that is using this data is "Bar".  Just for spice, I randomized the array values to assign to the data variables. class Foo attr_accessor :i0, :i1, :i2, :i3 initialize @i0 = 0; @i1 = 0; @i2 = 0; @i3 = 0 end end class Bar attr_accessor :f def initialize @f = Foo.new @image_sort = %w{ 1 2 3 4 }.shuffle end def setup @image_sort.each_with_index do | i, idx | @f.instance_variable_set( :"@i#{idx}", i ) end puts @f.i0 puts @f.i1 puts @f.i2 puts @f.i3 end end g = Bar.new g.setup