javascript - 配列に項目を追加および削除しようとしています

Question

このスクリプトは、ユーザーに配列内の項目の追加または削除を求めることによって機能します。次に、このループを続行するように求めます。ここでの問題は、スクリプトがユーザーの入力 (removeItem) をリスト内の項目 (myList[i]) に一致させていないように見えることです。なぜこれが一致しないのか、私は途方に暮れています。

// new method for removing specific items from a list
Array.prototype.remove = function(from,to) {
    var rest = this.slice((to || from) + 1 || this.length);
    this.length = from < 0 ? this.length + from : from;
    return this.push.apply(this, rest);
};

printList = function() {
    var listLength = myList.length;
    for (i = 0; i < listLength; i++) {
        document.write(i + ":");
        document.write(myList[i] + "<br/>");
    };
    document.write("<br/><br/>");
};

// initial list
var myList = new Array ();
if (myList.length === 0) {
    document.write("I have " + myList.length + " item in my list. It is: <br/>");
}
else {
    document.write("I have " + myList.length + " items in my list. They are: <br/>");
}
printList();

var continueAdding = "yes";
var askToContinue = "";

while (continueAdding === "yes") {
    // loop
    var askUser = prompt("What do you want to [A]dd or [R]emove an item to your inventory?").toUpperCase();
    switch (askUser) {
        case "A": { // add an user specified item to the list
            var addItem = prompt("Add something to the list");
            myList.push(addItem);
            printList();
            break;
        }
        case "R": { // remove an user specified item from the list
            var removeItem = prompt("what do you want to remove?"); 
            var listLength = myList.length;
            for (i = 0; i < listLength; i++) {
                if (removeItem === myList[i]) {
                    document.write("I found your " + removeItem + " and removed it.<br/>");
                    myList.remove(i);
                }
                else {
                    document.write(removeItem + " does not exist in this list.<br/>");
                    break;
                }
                if (myList.length === 0) {
                    myList[0] = "Nada";
                }
            };
            printList();
            break;
        }
        default: {
            document.write("That is not a proper choice.");
        }
    };

    askToContinue = prompt("Do you wish to continue? [Y]es or [N]o?").toUpperCase(); // ask to continue
    if (askToContinue === "Y") {
        continueAdding = "yes";
    }
    else {
        continueAdding = "no";
    }
}