[IHNFIWIWD] The compose function is executed left to right

[cullylarson]

It's pretty unusual behavior for compose to execute left to right. Every other compose implementation I've come across executes right to left. One other issues is that this behavior isn't documented in docs/functional-php.md

[lstrojny]

Indeed, that was a mistake when implementing it but it’s probably too late to fix that now in a sane way. The only way I would see is adding a function with a different name to do the right thing.

[cullylarson]

Ah, yeah, that's a tough one. A good solution might be to just be very explicit about that functionality in the documentation. I only noticed it was happening after spending some time trying to debug a function that was using compose, and then looking at the code for compose. I actually had to go back and change all of my other uses of compose.

[MarcoWorms]

Is it too harmful to break the current interface and make compose do right-to-left composition which would be the expected behaviour and add a pipe function that does the current left-to-right composition? Ramda (https://github.com/ramda/ramda) does it this way and it seems really sane.

[lstrojny]

@MarcoWorms I wouldn’t wanna do this for 1.x but I could very well imagine doing this for 2.x.

[lstrojny]

Will be addressed with 2.0