$ rvm use 1.8.7 $ ruby -e'puts [1, "a"].to_s' 1a $ rvm use 1.9 $ ruby -e'puts [1, "a"].to_s' [1, "a"]
I've been working on converting my client's Rails App to Ruby 1.9.
It's been fairly painless, but there have been a few stumbling blocks. One has been the use of arrays within string interpolations, and the difference in the result
Prior to Ruby 1.9 Array#to_s was a synonym for Array.join which resulted in the concatenation of the results of sending to_s to each element. In Ruby 1.9 Array#to_s is the same as Array#inspect.
This has had a tendency to produce subtle problems which are at time hard to track down. Once they are found, the solution is to do something like changing:
"Whatever #{some_array}"
to:
"Whatever #{some_array.join}"
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