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bitwizeshift • last Sunday at 11:02 PM • 1 reply • view on HN

Why “perma goodbye”?

Go has a similar function declaration, and it supports anonymous functions/lambdas.

E.g. in go, an anonymous func like this could be defined as

foo := func(x int, _ int) int { … }

So I’d imagine in Zig it should be feasible to do something like

var foo = fn(x: i32, i32) i32 { … }

unless I’m missing something?

Replies

lenkite • last Sunday at 11:32 PM

Anonymous functions aren't the same as lambda functions. People in the Go community keep asking for lambda functions and never get them. There should be no need for func/fn and explicit return. Because the arrow would break stuff is one of the reasons.

See

https://github.com/golang/go/issues/59122

https://github.com/golang/go/issues/21498

    res := is.Map(func(i int)int{return i+1}).Filter(func(i int) bool { return i % 2 == 0 }).
             Reduce(func(a, b int) int { return a + b })
vs

    res := is.Map((i) => i+1).Filter((i)=>i % 2 == 0).Reduce((a,b)=>a+b)