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Groups > comp.lang.javascript > #34397
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: Running promises in order |
| Date | 2017-12-01 02:37 +0100 |
| Organization | PointedEars Software (PES) |
| Message-ID | <4793140.hK7J4vrPBd@PointedEars.de> (permalink) |
| References | <QKqdnRBapfSmMoHHnZ2dnUU7-KHNnZ2d@westnet.com.au> <984bc0e7-1a08-444d-baac-caa0b7283380@googlegroups.com> |
Michael Haufe (TNO) wrote: > On Monday, November 27, 2017 at 6:35:22 PM UTC-6, Andrew Poulos wrote: >> How do I run an arbitrary number of promises where the subsequent >> promise is not to run before the previous promise is fulfilled? >> >> The values a previous promise generates is used by subsequent promises. >> >> The various examples I've googled have the user triggering the next >> promise eg. by clicking a button. > > At first blush, something like the following: > > promiseArray.reduce((prev, curr) => ( > prev.then(resultList => ( > asyncFunc(curr).then(result => resultList.concat(result)) > )) > ), Promise.resolve([])); That is a very clever (mis)use of Array.prototype.reduce() :) -- PointedEars FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix> <https://github.com/PointedEars> | <http://PointedEars.de/wsvn/> Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.
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Running promises in order Andrew Poulos <ap_prog@hotmail.com> - 2017-11-28 11:35 +1100
Re: Running promises in order "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-11-28 13:02 +0100
Re: Running promises in order "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-11-28 13:31 -0800
Re: Running promises in order Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-12-01 02:37 +0100
Re: Running promises in order "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-12-01 06:53 -0800
Re: Running promises in order ali.abdulhannan@gmail.com - 2017-12-02 04:04 -0800
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