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What are the main benefits of using Mono over Java (or any other "free" or Linux-friendly language/runtime)?
Mono will always trail behind the latest developments in the .NET framework, why would you want to use Mono over another traditional open-source language/framework (Java)?
EDIT: Like someone mentioned below, I guess the root question is, why would you want to use .NET on the Linux platform?
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when you run Mono. just() it creates immediately an Observable(Mono)and reuses it but when you use defer it doesn't create it immediately it creates a new Observable in every subscribe.
A Flux object represents a reactive sequence of 0.. N items, while a Mono object represents a single-value-or-empty (0..1) result. This distinction carries a bit of semantic information into the type, indicating the rough cardinality of the asynchronous processing.
The flatMapMany is a generic operator on Mono that returns a Publisher. Let's apply flatMapManyto our solution: private <T> Flux<T> monoTofluxUsingFlatMapMany(Mono<List<T>> monoList) { return monoList .flatMapMany(Flux::fromIterable) .log(); }
Mono#flatMap takes a Function that transforms a value into another Mono . That Mono could represent some asynchronous processing, like an HTTP request. On the other hand, Mono#map takes a Function that transforms a value of type T into another value, of type R .
The answer is pretty obvious: because you want to use .Net on Linux.
This of course begs the question (which I think is really what you're getting at): why would you want to use .Net on Linux (over Java)?
Lots of reasons:
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