ESP8266 Community Forum

- Wed Apr 15, 2015 4:41 pm #14653 Where does PubSubClient.h come from?

Thanks

- Thu Apr 16, 2015 1:38 am #14678

Where does PubSubClient.h come from?

Thanks

https://github.com/knolleary/pubsubclient

- Thu Apr 16, 2015 7:48 am #14699 Since I'm not an expert in C, nor in any other programming language, I'm kind of puzzled by this statement:

Code: Select allwhile (!!!client.connect(clientid))

I mean, why the triple bang? Wouldn't one be enough?

- Thu Apr 16, 2015 8:56 am #14706

Since I'm not an expert in C, nor in any other programming language, I'm kind of puzzled by this statement:

Code: Select allwhile (!!!client.connect(clientid))

I mean, why the triple bang? Wouldn't one be enough?

One would be enough. Having three is supposed to make the code more readible as one is easy to miss when skim reading, and optimizing compilers should optimize it down to a single not operation. Just did it by habit, I've no idea if the compiler used here does actually optimize them away though.