It is 'comprehensible' in the sense that it's possible to figure out how it happened, but it absolutely does not "make sense" in terms of being a reasonable language design decision. It's 100% incompetence on the part of the person who created Javascript.

[–] Alexstarfire@lemmy.world 8 points 2 days ago (1 children)

I mean, I'd never try to do this anyway because if the types aren't the same unexpected things can happen. That's like programming 101.

[–] grue@lemmy.world 12 points 2 days ago (1 children)

Exactly, which is why designing the language to allow it is incompetence.

[–] Alexstarfire@lemmy.world 1 points 2 days ago

Fair enough.

[–] raspberriesareyummy@lemmy.world 2 points 2 days ago

Thanks for saving me the typing.

[–] fushuan@lemm.ee 2 points 2 days ago (1 children)

It makes perfect sense if the Lang objective is to fail as little as possible. It picks the left side object, checks if the operand is a valid operand of the type. If it is, it casts the right variable into that type and perform the operand. If it isn't, it reverses operand positions and tries again.

The issue here is more the fact that + is used both as addition and as concatenation with different data types. Well, not an issue, just some people will complain.

[–] grue@lemmy.world 2 points 2 days ago

Computing a nonsensical result is itself a failure. Continuing to run while avoiding giving an error in that case accomplishes nothing but to make the program harder to debug.