javascript vs lua

let's say i might be working on something ``secret'' and i want to embed a scripting language that isn't too off the wall for end users. i hear luajit is kinda fast and v8 is really fast and speed would be quite nice since user scripts might be called hundreds of thousands of times in short timeframes

i've heard javascript has better semantics and is generally more pleasant to use, but i want /prog/'s opinion so i don't fuck up and regret it later

dedicated string concatenation operator
Oh, you mean like . in PHP, the veritable pinnacle of language design?

+ is absolutely fine. It sums numbers and concatenates strings. Really, that's not too complex for you to remember, is it?

The rest of it is the not the result of + being broken, but of type coercion being tricky. Making sure the values coming in are within expected bounds is a bread and butter programming task. + doesn't deserve any of type sanitation's backlash.