Show HN: Python library for functional programming

Re:Show HN: Python library for functional programming by zimablue on Thursday December 14, 2017 @06:35AM (#15921482)

I don't use this but you could argue that it's useful to have a standard encapsulation of failure/missing that isn't null? Where some situation means that null already has a meaning, the alternative is to create a wrapper class for your situation (not general), or a general wrapper class which is basically what this is. So it's not completely useless whilst kind of crippled by no pattern matching?

Edit: although I guess that just using a tuple would be better for this maybe

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Re:Show HN: Python library for functional programming by catnaroek on Thursday December 14, 2017 @11:26AM (#15923527)

> I don't use this but you could argue that it's useful to have a standard encapsulation of failure/missing that isn't null?

I don't see what encapsulation you're talking about. Maybe and Either are very much concrete, not abstract, data types.

> Where some situation means that null already has a meaning, the alternative is to create a wrapper class for your situation (not general), or a general wrapper class which is basically what this is.

Unless you want to take advantage of existing plumbing infrastructure such as a monad transformer library, custom wrapper classes for your particular situation are precisely the right tool for the job.

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