xxxxxxxxxx
%w[ant bear cat].all? { |word| word.length >= 3 } #=> true
%w[ant bear cat].all? { |word| word.length >= 4 } #=> false
%w[ant bear cat].all?(/t/) #=> false
[1, 2i, 3.14].all?(Numeric) #=> true
[nil, true, 99].all? #=> false
[].all? #=> true