Creating a battlefield grid in Ruby - ruby

Question

I'm attempting to build a battlefield made of 10x10 grid.
Below is my code:
SHIP_HASH = { submarine: 2, destroyer: 3, destroyer: 3, cruiser: 4, aircraftcarrier: 5,}
def print_results
board_layout = Array.new(10, " ").map{|row| Array.new(10, " ")}
row_label = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
column_label = [" ", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
end
print print_results
I received the output:
[" ", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
What I wanted is to generate an output like below but I dunno know what's the error.
0 1 2 3 4 5 6 7 8 9
0 . . . . . . . . . .
1 . . . . . . . . . .
2 . . . . . . . . . .
3 . . . . . . . . . .
4 . . . . . . . . . .
5 . . . . . . . . . .
6 . . . . . . . . . .
7 . . . . . . . . . .
8 . . . . . . . . . .
9 . . . . . . . . . .

Answer 1

So in ruby, the last thing evaluated in a method is what is returned. So in your print results, the last thing evaluated is the assignment of column_label which is what you see is returned.
Here is the code, note the use of print in some cases and puts in others as they do different things:
SHIP_HASH = { submarine: 2, destroyer: 3, destroyer: 3, cruiser: 4, aircraftcarrier: 5,}
def print_results
board_layout = Array.new(10, ".").map{|row| Array.new(10, ".")}
row_label = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
column_label = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]
print "\t"
print row_label.join("\t")
puts
board_layout.each_with_index do |row, i|
print column_label[i]
print "\t"
print row.join("\t")
puts
end
end
print_results
Output:
0 1 2 3 4 5 6 7 8 9
0 . . . . . . . . . .
1 . . . . . . . . . .
2 . . . . . . . . . .
3 . . . . . . . . . .
4 . . . . . . . . . .
5 . . . . . . . . . .
6 . . . . . . . . . .
7 . . . . . . . . . .
8 . . . . . . . . . .
9 . . . . . . . . . .
Let me know if you have any questions on that.