Created
June 2, 2014 18:51
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Dry Erase Marker
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| class Whiteboard | |
| attr_accessor :contents | |
| def initialize(contents = []) | |
| @contents = contents | |
| end | |
| def erase | |
| @contents = [] | |
| end | |
| end | |
| class DryEraseMarker | |
| attr_reader :color, :capacity | |
| def initialize(color) | |
| @color = color | |
| @capacity = 100 | |
| end | |
| INK_USE_PER_CHARACTER = 0.01 | |
| def write(contents, whiteboard) | |
| @capacity = @capacity - (INK_USE_PER_CHARACTER * contents.length) | |
| whiteboard.contents << contents | |
| end | |
| end |
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