Why is Method#arity called, well, arity?

StackOverflow https://stackoverflow.com/questions/1209847

  •  06-07-2019
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Question

In Ruby, I know that Method#arity will return a value representing the number of arguments accepted by a method, however I do not know why it is called arity. Can anyone provide some insight into why it would exist in such a seemingly random namespace? Also, how do you pronounce it?

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Solution

Because that's actually the name for it. http://en.wikipedia.org/wiki/Arity

I pronounce it AIR-i-TEE like in polarity.

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