The Evolution of a Programmer
The Original Python Version
In some ways, it shows the differences between the methods and reasons of different programmers.
Personally, I like
def fact(x): return x > 1 and x * fact(x - 1) or 1 print fact(6)
out of them all. (or would write).
The Lambda version sacrifices clarity in variable names, and understood logic.
The Ruby Version
# The evolution of a Ruby programmer def sum(list) total = 0 for i in 0..list.size-1 total = total + list[i] end total end def sum(list) total = 0 list.each do |item| total += item end total end def sum(list) total = 0 list.each{|i| total += i} total end def sum(list) list.inject(0){|a,b| a+b} end class Array def sum inject{|a,b| a+b} end end def sum(list) list.reduce(:+) end
And, of course, there’s always using StackOverflow to find a good technique and build upon it.
For ruby, also, the rubydocs are invaluable for refactoring. Lots of great built-in stuff.
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