map/filter/reduce/lambda opinions and background unscientific mini-survey

[Erik Max Francis]

Terry Hancock wrote:

> It's a generalization rather than a specialization:
> 
> double (or couple)
> triple
> quadruple
> quintuple
> sextuple
> septuple
> octuple
> nontuple
> ...
> 
> Maybe a wee bit less obvious, but still understandable.

The general form is explicitly called an "n-tuple" or "tuple" in 
mathematics.

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