obj.instance_variable_defined?(symbol) â true or false
Instance Public methods
Returns true if the given instance variable is defined in
obj.
1 2 3 4 5 6 7 8 9 | class Fred def initialize(p1, p2) @a, @b = p1, p2 endendfred = Fred.new('cat', 99)fred.instance_variable_defined?(:@a) #=> truefred.instance_variable_defined?("@b") #=> truefred.instance_variable_defined?("@c") #=> false |
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