Show HN: A JavaScript function that looks and behaves like a pipe operator

Re:Show HN: A JavaScript function that looks and behaves lik... by mg on Wednesday September 27, 2023 @03:47PM (#37680239)

This:

    a = f((e(d(c(b))), 4), 5)

Seems not to make sense. Replacing c(b) with x we get:

    a = f((e(d(x)), 4), 5)

Replacing d(x) with x we get:

    a = f((e(x), 4), 5)

Replacing e(x) with x we get:

    a = f((x, 4), 5)

What is that?

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Re:Show HN: A JavaScript function that looks and behaves lik... by notpushkin on Wednesday September 27, 2023 @05:03PM (#37681272)

Sorry, messed up parens here. It should have been:

    a = f(e(d(c(b))), 4), 5)

b is passed to c, then the result is passed to d, then to e along with 4 as a second parameter, and finally to f along with 5.

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Re:Show HN: A JavaScript function that looks and behaves lik... by mg on Thursday September 28, 2023 @02:07AM (#37685868)

    a = f(e(d(c(b))), 4), 5)

That has 4 opening parenthesis and 5 closing parenthesis.

    b is passed to c

        b ~> c

    then the result is passed to d

        b ~> c ~> d

    then to e along with 4 as a second parameter

        b ~> c ~> d,4 ~> e

    and finally to f along with 5

        b ~> c ~> d,4 ~> e,5 ~> f

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Re:Show HN: A JavaScript function that looks and behaves lik... by notpushkin on Thursday September 28, 2023 @04:41AM (#37686969)

    b ~> c ~> d,4 ~> e

This reads as

    b ~> c ~> (d, 4) ~> e

to me. Sure, you can get used to it, but it’s pretty unnatural. Is this syntax used in any other languages?

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Re:Show HN: A JavaScript function that looks and behaves lik... by mg on Saturday September 30, 2023 @03:55AM (#37713492)

The nice aspect of "this ~> that" is that the meaning is simply "put this into that". And that it results in the shortest code.

An alternative would be:

    b ~> c ~> d ~> e(%,4)

Slightly longer, but maybe easier to read. Also easier to handle, as you can remove the fourth part " ~> e(%,4)" without having to change the third part.

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