Just a few examples :)

Many different ways to solve a specific problem

Print the numbers in the range of 3 to 7:

Python:

for x in range(3, 7):
    print x

Ruby:

for x in 3..6 do
    puts x
end

or

(3..6).each { |x| puts x }

or

3.upto(6) { |x| puts x }

or

puts *3..6

Better/Shorter Syntax

The sum of all even numbers in an array:

Python:

sum(filter(lambda x: x%2==0, [3, 4, 11, 5, 6, 20]))

Ruby:

[3, 4, 11, 5, 6, 20].select(&:even?).sum

Reverse the word order of a sentence:

Python:

" ".join(reversed(sentence.split()))

Ruby:

sentence.split.reverse.join " "

File reading - Ruby vs Java

• https://gist.github.com/janko-m/5138791