Interesting features from various modern programming languages

Re:Interesting features from various modern programming lang... by singularity2001 on Friday November 10, 2017 @07:29AM (#15669423)

Pipeline operator is often superfluous if proper object oriented programming is used. "hello".capitalize (ruby style)

"implicit 'it'" is my favorite: strings.filter{ it.length == 5 }

And Cascade operator buttons..hidden=true

Automatic currying is dangerous

Method extensions are not 'new' but nice

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by marcosdumay on Friday November 10, 2017 @09:04AM (#15669909)

> Pipeline operator is often superfluous if proper object oriented programming is used.

Well, I have just replied to somebody asking about the differences: https://news.ycombinator.com/item?id=15669886

> Automatic currying is dangerous

On languages that don't enforce numbers of arguments. That's Javascript, Python, and I don't think there's any other.

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by wiml on Friday November 10, 2017 @06:06PM (#15673847)

The "implicit it" is called anaphor in Lisp (though using that term for a programming language feature I think only goes back to the 1990s; the idea itself is older).

(The word "anaphor" here comes from the study of grammar in natural languages.)

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by kazinator on Saturday November 11, 2017 @02:32PM (#15677708)

The usage goes back to Paul Graham and his macros with the implicit it.

Which appear in Arc.

In which this site is developed.

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by Sean1708 on Friday November 10, 2017 @07:41AM (#15669460)

> Automatic currying is dangerous

Why?

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by tpxl on Friday November 10, 2017 @08:36AM (#15669753)

You can accidentally leave out a parameter and end up with a function instead of the result.

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by hood_syntax on Friday November 10, 2017 @09:21AM (#15670002)

That's an issue when there's no type checking, but a lot of languages with currying by default have type systems

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by Sean1708 on Friday November 10, 2017 @09:28AM (#15670052)

Are there any dynamic languages that have automatic currying? I agree that that would be dangerous, but it's also something that I've literally never seen.

[ Parent | on HN ]

Re:Interesting features from various modern programming lang... by tpxl on Monday November 13, 2017 @03:14AM (#15685036)

I don't know, but that's the first thing that popped into my mind after "this is cool". It would generally be a non-issue with good development tools.

[ Parent | on HN ]