ruby - Permutation between elements of an array -



ruby - Permutation between elements of an array -

i'm coding plugin in google sketchup ruby , faced real problem while trying permute 2 arrays nowadays in array depending on user combination.

i have array of arrays [["1"],["lol"], ["so"]]

when have combination <[1, 2, 3] it's fine, should remain same : [["1"],["lol"], ["so"]]

but when have combination [2, 3, 1], output should : [["lol"], ["so"], ["1"]]

for [3,1,2] => [["so"], ["1"], ["lol"]]

...etc

edit sorry guys forgot array have bit : [["1, 2, 3"], ["lol1, lol2, lol3"], ["so1, so2, so3"]] combination [2, 3, 1] output should : [["2, 3, 1"], ["lol2, lol3, lol1"], ["so2, so3, so1"]]

thanks helping me out.

you utilize collect:

array = [["1"],["lol"], ["so"]] indexes = [2, 1, 3] indexes.collect {|i| array[i-1]} #=> [["lol"], ["1"], ["so"]]

if set indexes 0-based drop -1

split , map can used turn strings values:

"1, 2, 3".split(",").map { |i| i.to_i} # [1, 2, 3]

you can split strings

"lol2, lol3, lol1".split(/, /) #=> ["lol2", "lol3", "lol1"]

you should able set above want.

ruby-on-rails ruby

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