infix ||>

infix ||> -- pipe with a two-tuple argument, destructuring the tuple into arguments

This allows changing the order of function application: instead of

f(a,b i32) => a+b
l1 := [1,2,3,4]
l2 := [4,3,2,1]
l := l1.pairs l2
.map p->{(p1,p2) := p; f p1 p2}

you can write

l1 := [1,2,3,4]
l2 := [4,3,2,1]
l := l1.pairs l2
.map (p -> p ||> f)

which often corresponds more naturally to the data flow through the code.