Inventory

function solve(inputArr) {
    let inventory = inputArr.shift().split(", ");

    for (let i = 0; i < inputArr.length; i++) {

        let tokens = inputArr[i].split(" - ");

        if (tokens[0] == "Collect") {
            if (inventory.includes(tokens[1])) {
                continue;
            } else {
                inventory.push(tokens[1]);
            }

        } else if (tokens[0] == "Drop") {
            if (inventory.includes(tokens[1])) {
                let idx = inventory.indexOf(tokens[1]);
                inventory.splice(idx, 1);
            } else {
                continue;
            }
        } else if (tokens[0] == "Renew") {
            if (inventory.includes(tokens[1])) {
                let idx = inventory.indexOf(tokens[1]);
                let item = inventory.splice(idx, 1);
                inventory.push(item);
            } else {
                continue;
            }
        } else if (tokens[0] == "Combine Items") {
            let items = tokens[1].split(":");

            if (inventory.includes(items[0])) {
                let idx = inventory.indexOf(items[0]);
                inventory.splice(idx+1, 0, items[1]);
            } else {
                continue;
            }
        }

    }
    console.log(inventory.join(", "));
}

solve(['Iron, Wood, Sword', 'Collect - Gold', 'Drop - Wood', 'Craft!']);


solve(['Iron, Sword', 'Drop - Bronze', 'Combine Items - Sword:Bow', 'Renew - Iron', 'Craft!'])