Destroy All Ifs – A Perspective from Functional Programming

Re:Destroy All Ifs – A Perspective from Functional Programming by kmiroslav on Sunday July 17, 2016 @10:21AM (#12110239)

Doesn't that make the parameter anonymous, though? Can you println that _ and see the value of the current element?

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Re:Destroy All Ifs – A Perspective from Functional Programming by vorg on Sunday July 17, 2016 @05:22PM (#12111898)

Use a function that prints then returns its parameter:

  list(1, 2, 3, 4).reduce{print(_) + _} == 10

Use it if you or your language hasn't defined such a function:

  list(1, 2, 3, 4).reduce{it:= _; println(it); it + _} == 10

In fact, any name for it will do.

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Re:Destroy All Ifs – A Perspective from Functional Programming by SatvikBeri on Sunday July 17, 2016 @01:52PM (#12110985)

Yeah, that's the tradeoff–gain the ability to work with multiple parameters but lose the ability to reuse a single one.

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