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Learn JavaScript in Arabic 2021
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ال Code الموجود في الدرس

/*
  Arrays Methods [Search]
  - indexOf(Search Element, From Index [Opt])
  - lastIndexOf(Search Element, From Index [Opt])
  - includes(valueToFind, fromIndex [Opt]) [ES7]
*/

let myFriends = ["Ahmed", "Mohamed", "Sayed", "Alaa", "Ahmed"];

console.log(myFriends);

console.log(myFriends.indexOf("Ahmed"));
console.log(myFriends.indexOf("Ahmed", 2));

console.log(myFriends.lastIndexOf("Ahmed"));
console.log(myFriends.lastIndexOf("Ahmed", -2));

console.log(myFriends.includes("Ahmed"));
console.log(myFriends.includes("Ahmed", 2));

if (myFriends.lastIndexOf("Osama") === -1) {
  console.log("Not Found");
}

console.log(myFriends.indexOf("Osama"));
console.log(myFriends.lastIndexOf("Osama"));