Remove item from an array

Hello everyone.

I’ve added items to an array using a checkbox inside a repeater. Now I want to remove the item from the array (using the _id). I’ve found a solution here: https://www.wix.com/velo/forum/community-discussion/how-to-remove-an-item-from-an-array but not sure how to implement it. My code:

function selectItem() {

let itemToAdd = {}; 
let sumTotal = 0; 

$w("#selectItem").onChange((event) => { 
    const $item = $w.at(event.context); 

    if ($item("#selectItem").checked) { 
        let finalPrice = $item("#price").text * $item("#dropdown1").value; 
        $item("#ifMarked").text = finalPrice.toString(); 

        let id1 = $item('#title').text; 
        let id11 = id1.replace(/\s/g, ""); 
        let price = $item('#price').text; 
        let marked = $item('#ifMarked').text; 
        let catImg = $item("#vegNonVeg").src; 
        let qty = $item('#dropdown1').value; 
        //console.log(catImg); 

        itemToAdd = { 
            "_id": id11, 
            "catImg": catImg, 
            "price": price, 
            "qty": qty, 
            "title1": id1, 
            "ifMarked": marked 
        }; 
        secondRepeaterData.push(itemToAdd); 
        console.log(secondRepeaterData); 

    } else { 
        //remove the item 
    } 

}); 

}