Question

How to access each cell in a 2D array by index in Ruby

Answer 1

arr = [["a", "b", "c"], ["d", "e", "f", "g"], ["h", "i"]]

arr.each_index do |i|
    row = arr[i]
    row.each_index do |j|
        puts String(i) << " " << String(j) << " = " << arr[i][j]
    end
end
 
 
 
# run:
   
# 0 0 = a
# 0 1 = b
# 0 2 = c
# 1 0 = d
# 1 1 = e
# 1 2 = f
# 1 3 = g
# 2 0 = h
# 2 1 = i

 

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