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For all exercises: no fork/exec/system/qx/open, no cmdline options, no user input, no modules, no tie, no bless, no %SIG. Make sure you ... For extra points, try to make them work under strict (warning: for one exercise no strict solution is known (yet))
Exercise 1: Create an array @x such that changing $x[0] also sets $x[1] to the same value ... Bonus Exercise: The code snippet 'sub foo{} goto +foo' produces an error: "Can't find label SCALAR(0x31c70c)" (the address may vary) Where does that ref come from? What does it point to?
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