Yes, I agree. Thanks a lot. ) Roland On May 31, 2017 19:07, <jonathandly...@gmail.com> wrote:
> A callback is not synchronous, his point was that it would be nice to > communicate synchronously between LC and JS, rather than use complex > callback chains. > > I agree with him, but I don't think there is a universal way to do that, > just because some things in JavaScript, like rendering an image or using a > webworker, are inherently asynchronous. > > Sent from my iPhone > > > On May 31, 2017, at 12:36 PM, Roland Huettmann via use-livecode < > use-livecode@lists.runrev.com> wrote: > > > > @BR wrote: ... "What's very difficult, as you write in detail, are > > "callbacks" for _synchronous_communication..." > > > > Callback functions? > > > > In my mind, a "callback" is always asynchronous -? Let us say in > Javascript > > - passing the function name and parameters of Javascript through LCS/LCB > > and then somehow the result is put into a variable while I am continuing > > processing other stuff. Maybe I am wrong? I am calling a server, waiting > > for the result, but I could wait forever and the result will possibly > never > > come. So it would be blocking doing other things. A callback would free > me > > from waiting for nothing. Is this a right definition for "callback"? > > > > What defines "callback"? I could understand though that I am calling a > > function in the browser widget (using the "callback" name of the > function) > > which will be executed through Javascript and will be returning a value > for > > further processing. What means "synchronous" or "asynchronous" in this > > context? > > > > Again, in my mind, a callback is when I send off a parcel to my friend > with > > an instruction to tell me that it arrived and the confirmation of > arrival. > > The confirmation is the callback. Then I know my friend received the > > parcel. Or in another analogy, I am calling someone by phone asking to > call > > me back. The person may call immediately or may call never or in a couple > > of days. This is asynchronous. > > > > How would a callback become synchronous? Is it then still a "callback"? > > _______________________________________________ > > use-livecode mailing list > > use-livecode@lists.runrev.com > > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
