2_numbers - mid exam - fundamentals

function solve(arr) {
    let list = arr.shift().split(' ').map(Number);
    for(let element of arr) {
        let temp = element.split(' ');
        let command = temp[0];
        let next = Number(temp[1]);
        if(command === "Add") {
            list.push(next);
        }
        else if(command === "Remove") {
            list.splice(list.indexOf(next), 1);
        }
        else if(command === "Replace") {
            let random = Number(temp[2]);
            list.splice(list.indexOf(next), 1, random);
        }
        else if(command === "Collapse") {
            let fix = list.filter(x => x >= next);
            list.splice(0, list.length);
            list.push(...fix);
        }
        else if(command === "Finish") {
            break;
        }
    }
    console.log(list.join(' '));
}

solve(["5 9 70 -56 9 9","Replace 9 10","Remove 9","Finish"]);