How does JS interpreter this line: if ("foo"[0] === "f"){}?
Two versions I could think of:
Version 1:
JavaScript creates a completely new string object which stores "f". This would require a lot more time than the second option, tho in my opinion this version looks more like JavaScript than the other.
Version 2:
Either JavaScript's lexer or parser converts "foo"[0] to "f". Because we are not talking about initializing or setting the value of a variable, we don't need to store the whole string, and we don't need to create a new string object. The interpreter just simply runs if ("f" === "f") {} .
Which of the 2 versions are the correct one? Is there another version? I'm also happy to read the solutions in other languages.