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Cardinality of the set of all functions on R [migrated]

What is the cardinality of the set of all function on R?
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Implementing key-value associations in Mathematica 9 with inexact numbers for keys

I'm not sure of what type of problem my issue falls into, so I haven't been able to search forums with any success. If this has already been solved then my apologies! Essentially I'm trying to set a ...
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Is there a better way of creating/assigning variables programmatically than using strings and ToExpression?

For quite a while now I've been wondering how to assign variables programmatically, and I have finally figured out one way of doing this. For example in a game where you have a variable number of ...
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Set-generating macro unexpectedly reaches recursion limit

One moment I decided to assign symbolic names to all special spaces since they all look the same when put literally in FrontEnd editor, more or less like "" or ...