Question

define a method named orderofappearance () that takes the name of a role as an argument and returns that roles order of appearance. if the role is not found, the method returns 0. ex: orderofappearance (\samwise gamgee\) returns 2. note: a method may access the objects properties using the keyword this. ex: this.title accesses the objects title property. // code will be tested with different roles and movies let movie = { title: \the lord of the rings: the fellowship of the ring\, director: \peter jackson\, composer: \howard shore\, roles: // roles are stored in order of appearance \frodo baggins\, \samwise gamgee\, \gandalf\, \aragorn\, \legolas\, \saruman\ , orderofappearance(role) { / your solution goes here / } }

Explanation:

Step1: Iterate through the roles array

Use a for loop to iterate through the this.roles array.

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

Step2: Check for role match

Inside the loop, check if the current element in the roles array (this.roles[i]) is equal to the role argument.

if (this.roles[i] === role) {

Step3: Return the index + 1

If a match is found, return the index (i) incremented by 1 (since order starts from 1, not 0).

return i + 1;

Step4: Return 0 if no match

If the loop finishes without finding a match, return 0.

return 0;

Answer:

orderOfAppearance(role) {
    for (let i = 0; i < this.roles.length; i++) {
        if (this.roles[i] === role) {
            return i + 1;
        }
    }
    return 0;
}