While the Promises/A+ specification is primarily focussed on JavaScript, the concept of promises certainly did not originate in JavaScript. For that matter, the

While the Promises/A+ specification is primarily focussed on JavaScript, the concept of promises certainly did not originate in JavaScript. For that matter, there are actually a number of implementations of Promises/A+ in other languages and platforms: https://github.com/promises-aplus/promises-spec/blob/master/implementations.md#in-other-languages https://github.com/promises-aplus/promises-spec/blob/master/...