As an R user, I'm used to the typical "<-" operator. However, I recently encountered operator "<<-". (It's from other people's code, therefore I cannot freely copy-paste it herein.) It appears they are equivalent, but I wonder if there is any difference between the two.
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2< – user2974951 Dec 12 '18 at 08:40
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2@user2974951 and with extreme caution ;-) – Wimpel Dec 12 '18 at 08:44
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@user2974951 It assigns only to the global environment if the variable is not found in a previous enclosing environment. – Roland Dec 12 '18 at 08:58
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@Leevo Either these other people are quite advanced R programmers or they don't know what they are doing. – Roland Dec 12 '18 at 09:00