Programmer Humor

Here’s my thought process: plus is for numbers and strings, so it’s gonna convert the arrays to either numbers or strings. If it converts them to 0, the answer is 0, if it converts them to 1, the answer is 2, if it converts them to strings, the answer is “12”.

You know what I didn’t say? [1,2]. Because plus is not for array concatenation. The question is meant to make you think you’ll get [1,2], because why else would you use plus on arrays?

In a language that uses plus for concatenation, you’ll see that kind of code all over, and know what you’ll get. But you never see that in JavaScript, because that’s not how we concatenate arrays.