What is global state?

Insanity: doing the same thing over and over again and expecting different results. -- attributed to Albert EinsteinGlobal state is essentially the same thing as insanity in this definition: a way to affect the execution of code hidden from sight, so that two apparently identical lines actually produce a different result depending on some external factor.For example:
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Source: http://feeds.dzone.com/~r/zones/css/~3/H1TLPehm5U0/what-global-state

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