Submitter James writes: "I'm working on a project that has as one of its components a Microsoft App for Excel 2013. My team lead wrote most of the app up to this point, and I'm adding features. While exploring her code, I ran into this little gem (in JavaScript):"


function ClearData() {
    var spn = document.getElementById("spntest");
    spn.innerHTML = "";
    var def = $.Deferred();

    var arBlankMiddle = new Array();
    var arNull = new Array();
    arNull.push(0);
    spn.innerHTML = "";
    for (var i = 1; i <= 50; i++) {
        arBlankMiddle.push([0]);
    }
    spn.innerHTML = "";
    var arBlank = new Array();
   // arBlank.push(arBlankMiddle);

    arBlank = [[""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""], [""]];
    spn.innerHTML = "";
    $.when(writeData("A1:A50", arBlank), writeData("B1:B50", arBlank), writeData("C1:C50", arBlank), writeData("D1:D50", arBlank), writeData("E1:E50", arBlank), writeData("F1:F50", arBlank), writeData("G1:G50", arBlank), writeData("H1:H50", arBlank), writeData("I1:I50", arBlank), writeData("J1:J50", arBlank), writeData("K1:K50", arBlank), writeData("L1:L50", arBlank), writeData("M1:M50", arBlank), writeData("N1:N50", arBlank)).done(function (res1, res2, res3, res4, res5, res6, res7, res8, res9, res10, res11, res12, res13, res14) {
        spn.innerHTML = "";
        def.resolve();
    });

    //$.when(writeData("A1:A50", arBlank)).done(function (res1) {
    //    def.resolve();
    //});

    return def.promise();
}

James explains: "writeData() is a function that writes to Excel given the specified range and data. So it looks like she started with an iterative approach, but in the middle switched to a non-iterative one, but left the half-finished iterative code in. I'm speechless."

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