This could be done but I see a few problems with it: 1. Though it does make ending from some functions like forEach able to be done it does not all returning from other functions like map or sort 2. It does not directly allow the returning of values but this might be rectified by having it be a function that you call and when it calls it stops any further calls and then returns the first parameter past
Original Message From: [email protected] Sent: August 28, 2017 4:17 PM To: [email protected] Cc: [email protected] Subject: Re: super return On Mon, Aug 28, 2017 at 12:29 PM, Sebastian Malton <[email protected]> wrote: > I have seen some people want to modify some of the array prototype > functions, especially forEach, so that returning from them returns a value. > However, I have also seems that this could break things since in some cases, > again forEach, the return value in explicitly defined. > > Thus I propose the new syntax `super return` and any other positive number > of supers. This syntax is currently not valid in any scenario and with the > current meaning of super seems, to me at least, relativity easy to > understand. > > The outcome of this basically means "return from current context up one > level and then return from there". > > A current method of doing this is by using try / catch but it is not ideal. > Using the above method I believe that it would be able to be better > optimized. This has been suggested in the past, by adding a fourth argument to the callback signature passing an opaque "halt" value. Returning the halt value would end execution of the looping function prematurely. No reason to add new syntax for this, plus hooks for userland to take advantage of it, when we can just use something that userland could adopt *today*. (As an added bonus, it would make the callback arguments be Element, Index, Collection, Halt, finally spelling out Brendan's full last name. ^_^) ~TJ _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
