Class Ruby

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  4. Check if an object is considered tainted by using the tainted method
x = "Hello, world!"
puts x.tainted?
y = [x, x, x]
puts y.tainted?
z = 20 + 50
puts z.tainted?
a = File.open("somefile").readlines.first
puts a.tainted?
b = ENV["PATH"]
puts b.tainted?
c = [a, b]
puts c.tainted?