ruby - How do I find .index of a multidimensional array

Question

Tried web resources and didnt have any luck and my visual quick start guide.

If I have my 2d/multidimensional array:

 array = [['x', 'x',' x','x'],
         ['x', 'S',' ','x'],
         ['x', 'x',' x','x']]

   print array.index('S')

   it returns nil

So then I go and type:

 array = ['x', 'S',' ','x']
 print array.index('S')

it returns the value I am looking for 1

My first guess something is being called wrong in the .index() and it needs two arguments one for both row and column? Anyways how do I make .index work for a multidimensional array? This is step one for solving my little maze problem

Answer 1

This will do it:

array = [['x', 'x',' x','x'],
         ['x', 'S',' ','x'],
         ['x', 'x',' x','x']]

p array.index(array.detect{|aa| aa.include?('S')}) # prints 1

If you also want 'S's index in the sub array you could:

row = array.detect{|aa| aa.include?('S')}
p [row.index('S'), array.index(row)] # prints [1,1]