The only global variables that I know of are the one's created by perl, and they tend to be magical (e.g $! yields the current value of errno when in a numerical context, and an error message in a string context).
I'm having a cold and my brain is only operating at half speed right now, so maybe I'm just confused. But I always thought that variables lived either in scalar or list context. Are there such beasts as numerical and string contexts as well?
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