Is there an algorithm to extract values in duets from an array and operate over them? [duplicate]

This question already has answers here: Ruby array access 2 consecutive(chained) elements at a time (4 answers) Closed 4 years ago.

I have an array like:

[1,2,3,4,5,6,7,8,9]

And I want to get items in duets like this:

• 1,2
  • Do some operations...
• 2,3
  • Do some operations...
• 3,4
  • Do some operations...
• 4,5
  • Do some operations...
• 5,6
  • Do some operations...
• 6,7
  • Do some operat开发者_Go百科ions...
• 7,8
  • Do some operations...
• 8,9
  • Do some operations...

Please suggest an elegant way to achieve this using Ruby.

---

[1,2,3,4,5,6,7,8,9].each_cons 2 do |a,b|
  p [a,b]
end

---

You want Enumerable#each_cons:

[1,2,3,4,5,6,7,8,9].each_cons(2){|pair| p pair}