为什么我在这里变得不确定？

Question

function myFunc() {
    var word = document.getElementById("Text1").value;
    var num = parseInt(document.getElementById("Text2").value);
    var numstr = num.split(",");
    var wordstr = word.split("");
    for (i = 0; i < word.length; i++) {
    }
    document.getElementById("myDiv").innerHTML += (wordstr[(numstr[i])-1]);

}

did I parseInt incorrectly? I've tried toString(), with ParseInt it doesn't do anything and without it I get 'undefined'

Answer 1

The parseInt() function parses a string and returns an integer. You check your input with id "Text2" and show your HTML here to clearify the issue.

Answer 2

Without knowing more about your problem, it looks like you are misunderstanding how parseInt() works. Despite the misleading name, it will read your string character by character, attempting to create an integer. It will stop as soon as it finds a character that can't be part of an integer.

If you pass it "1,2,3,4" then it will read the 2 fine, but as a comma cannot be parsed as part of an integer, it will return the number 2. It doesn't make sense to call split on a number.

As others have said, you really need to give us more details for us to be able to help, but I suspect a large part of the problem is not understanding what some of these functions do.

Maybe you could explain what you're trying to achieve, then we can help you get there. Right now, your code isn't clear enough without extra information.