elegance of functional programming

Functional programming allows you to write concise and elegant code. Mainstream languages like Ruby and C# support a lot of functional programming paradigms, and learning them makes you a better programmer. Below is a small example which demonstrates that:

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#6 lines of ugly code
i = 0
tasks = list.tasks
while(i < tasks.length - 2)
  tasks[i].priority.should >= tasks[i + 1].priority
  i += 1
end


#3 lines of elegant functional code
list.tasks.each_cons(2).each do |t1, t2|
  t1.priority.should >= t2.priority
end

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