what is the meaning of the expression (x = +_, force) in javascript?

Question

Can someone tell me the meaning of the expression (x = +_, force)? I know that x is getting incremented by _ but what does force separated by comma does?

  force.x = function(_) {
    return arguments.length ? (x = +_, force) : x;
  }

is it calling/referencing the function named force? in the full code force is a function..

For the `= +_`, [What does = +_ mean in JavaScript](https://stackoverflow.com/q/15129137/215552) — Heretic Monkey, Oct 09 '20 at 19:53

score 3 · Answer 1 · answered Oct 09 '20 at 19:49

3

The expression

(x = +_, force)

features the comma operator and return the last expression force. In this case as result for assigning.

A better style would be

force.x = function(_) {
    if (arguments.length) {
        x = +_;
        return force;
    } else {
        return x;
    }
}

answered Oct 09 '20 at 19:49

Nina Scholz

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oh.. Nina.... you again... great! ☺️ thanks – mx_code Oct 09 '20 at 19:52
one doubt... what happens when you return force ?? is it getting called or what?? – mx_code Oct 09 '20 at 19:54
`force` is never called. the value/reference is returned. – Nina Scholz Oct 09 '20 at 19:55
what is the need of that? – mx_code Oct 09 '20 at 19:55
it's not my code. – Nina Scholz Oct 09 '20 at 19:55
ok. great. thanks – mx_code Oct 09 '20 at 19:57
is there a way to connect with you please?? I'm a newbie developer.. seems like you know well a lot... I won't trouble you... this is for future help.. – mx_code Oct 09 '20 at 19:57
sorry. no way ... – Nina Scholz Oct 09 '20 at 19:59
but why??? is there a reason? – mx_code Oct 09 '20 at 20:00
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/222798/discussion-between-mex-and-nina-scholz). – mx_code Oct 09 '20 at 20:00

what is the meaning of the expression (x = +_, force) in javascript?

1 Answers1