DNA Pairing challenge - TypeError: unknown: o is undefined - help needed

JavaScript
1

Hi guys, starting with JS and trying to really do everything on my own, hence the garbage code. It works in Visual Studio Code as intended, but FCC is throwing “TypeError: unknown: o is undefined” and for the love of God I can not figure out why. I thought I am missing { somewhere, but that does not seem to be the case. Any help is much appreciated!

`function pairElement(str) {
    var arr = [];
    while (arr.push([]) < str.length);
    var arr2 = str.split("");
    for (let i = 0; i < arr2.length; i++) {
        arr[i].splice(i, 0, arr2[i]);
    }
    for (let j = 0; j < arr.length; j++) {
        if (arr[j] == "G") {
            arr[j].push("C");
        } else if (arr[j] == "C") {
            arr[j].push("G");
        } else if (arr[j] == "T") {
            arr[j].push("A");
        } else if (arr[j] == "A") {
            arr[j].push("T");
        }
    }

    return arr;
}

console.log(pairElement("GCTAG"));`
2

It’s that line, it should be while (arr.push([]) < str.length) {}.
That passes the test for me!

3

Thank you so much! so I was indeed missing {} :smiley:

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