Arrays_Advanced-houseParty

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/*Write a function that keeps track of guests that are going to a house party.
You will be given an array of strings. Each string will be one of the following:
-   "{name} is going!"
-   "{name} is not going!"
If you receive the first type of input, you have to add the person if he/she is not in the list (If he/she is in the list print: "{name} is already in the list!").
If you receive the second type of input, you have to remove the person if he/she is in the list (if not print: "{name} is not in the list!").
At the end print all the guests each on a separate line.*/

function myFunct(arrayOfStrings) {
    let arr = arrayOfStrings;
    let guestList = [];
    let not_going = [];
    let going = [];

    for (el of arr) {
        if (el.includes('not')) {
            not_going.push(el.split(' ')[0]);
        }
        else {
            going.push(el.split(' ')[0]);
        }
    }

    for (i = 0; i < going.length; i++) {
        if (!guestList.includes(going[i])) {
            guestList.push(going[i])
        } else {
            console.log(going[i], "is already in the list!");
        }
    }
    for (i = 0; i < not_going.length; i++) {
        if (guestList.includes(not_going[i])) {
            let removeThisGuestIndex = guestList.indexOf(not_going[i]);
            guestList.splice(removeThisGuestIndex, 1)
        } else {
            console.log(not_going[i], "is not in the list!")
        }
    }

    console.log(guestList.join('\n'))
}