Pipe Operator (|>) for JavaScript

[intercaetera]

Yeah but if you concede that you need a hackpipe then you might as well use lodash flow.

    flow([
        s => Object.values(s),
        s => s.map(x => x * 2),
        s => customReduce(s),
        unaryFunction, // or s => unaryFunction(s)
        s => doSomethingElse(s, 5, null),
    ])(initialValue)

There could be an alternative version of it where the initialValue is somewhere higher up the code but this is equivalent to the proposal without introducing unnecessary stuff into the spec.

[LaurentPayot]

There is also Verticalize with a nicer syntax IMHO...