# Re: Write Out Then Read In Hash of Two-element Arrays **URL:** \ **Category:** Ruby\ **Created:** [April 20, 2006, 11:44am UTC](https://www.ruby-forum.com/t/re-write-out-then-read-in-hash-of-two-element-arrays/58299 "2006-04-20T11:44:08Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![PeSSSSaS\_Botp](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/ecd19e/32.png) [@PeSSSSaS\_Botp](https://www.ruby-forum.com/u/PeSSSSaS_Botp)\ **Post date:** [April 20, 2006, 11:44am UTC](https://www.ruby-forum.com/t/re-write-out-then-read-in-hash-of-two-element-arrays/58299/1 "2006-04-20T11:44:08Z")
David B. wrote last Thursday, April 20, 2006 5:01 PM: … # fileOut.puts(histHash[i]) ``` ^^^^^ ``` there is a problem here. consider… irb(main):003:0\> puts [10,1] 10 1 =\> nil irb(main):004:0\> puts [10,1].to\_s 101 =\> nil i think you wanted the latter, so fileOut.puts(histHash[i].to\_s) should do. some tips: 1 try unit test 2 yaml 3 marshal kind regards -botp ---
**Author:** ![PeSSSSaS\_Botp](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/ecd19e/32.png) [@PeSSSSaS\_Botp](https://www.ruby-forum.com/u/PeSSSSaS_Botp)\ **Post date:** [April 20, 2006, 8:51pm UTC](https://www.ruby-forum.com/t/re-write-out-then-read-in-hash-of-two-element-arrays/58299/2 "2006-04-20T20:51:36Z")
Peña, Botp wrote: > David B. wrote last Thursday, April 20, 2006 5:01 PM: > … > > # fileOut.puts(histHash[i]) > > ``` > ^^^^^ > > ``` > > there is a problem here. consider… > > irb(main):003:0\> puts [10,1] > 10 > 1 > =\> nil > irb(main):004:0\> puts [10,1].to\_s > 101 > =\> nil > > i think you wanted the latter, so > > fileOut.puts(histHash[i].to\_s) > > should do. > > some tips: > > 1 try unit test > 2 yaml > 3 marshal > > kind regards -botp Peña, Yes, that was what I needed. And I will look into yaml and marshal. Uh, how ro I find documentation about unit test? In any case, thank you very much. David