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x = true
puts !x
puts !!x
puts !!!x
if not x then print 'A' end
if not not x then print 'B' end
if not !x then print 'C' end
if not not !!!x then print 'D' end
# if !(x**2 == 1) then print 'E' end
puts
a = x ? !x : x
class C
def bar(i, &b)
puts b[i]
self
end
end
c = C.new
a = !c.bar(1) { |x| x + 1 }.bar(2) { |x| x * 10 }.bar(3) { |x| x * 10 } ? 'X' : 'Y'
puts a
class D
def foo=()
print 'foo='
end
def bar()
print 'bar'
end
end
d = D.new
d.foo()
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