Python style solution?

[hax]

Python provides operator module, if JS adopt such style, it would be look like:

import {plus} from "@operator"  // built-in module
let sum = array.reduce(plus)

Even built-in modules are controversial , put them on some global namespaces is always an option:

let sum = array.reduce(Math.plus)

Pros:

• No extra syntax.

Cons:

• Need remember names, eg. "plus" or "add" or "sum"? Some operators like ?? may have trouble to find simple name.
• Which namespace should we use? It seems Math is ok for most operators, and we already have Math.pow correspond to **, but some operators like in, instanceof, ?? seems not fit for Math. Other options are Function.xxx, or introduce a new namespace: Operator.xxx.
• Do not support partial application by itself. With partial application proposal, Math.plus~(?,1) is ok, but seems have no benefit compare to x=>x+1.

[ljharb]

or a template tag:

const sum = array.reduce(Math.operator`+`);

or a function:

const sum = array.reduce(Math.operator('+'));

[hax]

@ljharb Template tag is an interesting idea, though it's even much verbose ... 😅

But u inspired me, it could also be function.plus or do.plus (meta method :-)

[ljharb]

Slightly less verbose than just being a function :-p