NoMethodError?

Ruby
1

In the following code I am trying to print out the value of the
variable @symbol from an array of instances of the MapSector class. I
don’t understand why I’m getting “NoMethodError: undefined method
`symbol’ for #Array:0xb7cb025c” after putting this in irb and typing:
foo = GameMap.new(5,5)
foo.show_map

class GameMap
attr_accessor :height, :width, :id, :sectors
def initialize height, width
@height = height
@width = width
@id = nil
@sectors = Array.new(@height, MapSector.new) {Array.new(@width,
MapSector.new)}
end

def show_map
@sectors.each do |x|
puts x.symbol
end
end

end

class MapSector
attr_accessor :type, :symbol, :players
def initialize
@type = “plains”
@players = []
@symbol = “.”
end
end

2

Chris B. wrote:

In the following code I am trying to print out the value of the
variable @symbol from an array of instances of the MapSector class. I
don’t understand why I’m getting “NoMethodError: undefined method
`symbol’ for #Array:0xb7cb025c” after putting this in irb and typing:
foo = GameMap.new(5,5)
foo.show_map

Well I figured out the first half of my problem. I guess my show_map
method was trying to find the symbol variable inside the Array object,
whoops. So I have updated the show_map method to the following.

def show_map
x = 0
y = 0
while x < @height
while y < @width
puts self.sectors[x][y].symbol
y+= 1
end
x += 1
end
end

The problem I am having now is that when the method is run on a 4x4
array of MapSectors it only prints out 4 symbols…it should be 16. I
have verified that the nested arrays are all properly populated so I
guess it just isn’t iterating through them properly. Any ideas?

3

The problem I am having now is that when the method is run on a 4x4
array of MapSectors it only prints out 4 symbols…it should be 16. I
have verified that the nested arrays are all properly populated so I
guess it just isn’t iterating through them properly. Any ideas?

Ok I’ve gotten it all figured out and working, thank’s anyhow! =)