코드

// ## Array Cardio Day 2

const people = [
  { name: "Wes", year: 1988 },
  { name: "Kait", year: 1986 },
  { name: "Irv", year: 1970 },
  { name: "Lux", year: 2015 },
];

const comments = [
  { text: "Love this!", id: 523423 },
  { text: "Super good", id: 823423 },
  { text: "You are the best", id: 2039842 },
  { text: "Ramen is my fav food ever", id: 123523 },
  { text: "Nice Nice Nice!", id: 542328 },
];

// Some and Every Checks
// Array.prototype.some() // is at least one person 19 or older?
// const isAdult = people.some(function (person) {
//   const currentYear = new Date().getFullYear();
//   if (currentYear - person.year >= 19) {
//     return true;
//   }
// });

const isAdult = people.some((person) => {
  return new Date().getFullYear() - person.year >= 19;
});

console.log({ isAdult });

// Array.prototype.every() // is everyone 19 or older?
const allAdult = people.every((person) => {
  return new Date().getFullYear() - person.year >= 19;
});

console.log({ allAdult });

// Array.prototype.find()
// Find is like filter, but instead returns just the one you are looking for
// find the comment with the ID of 823423
// const comment = comments.find(function (comment) {
//   if (comment.id === 823423) {
//     return true;
//   }
// });

const comment = comments.find((comment) => {
  return comment.id === 823423;
});

console.log(comment);

// Array.prototype.findIndex()
// Find the comment with this ID
// delete the comment with the ID of 823423
const index = comments.findIndex((comment) => comment.id === 823423);

console.log({ index });

// comments.splice(index, 1); //comments 배열에서 index의 값을 가지는 위치에서부터 요소 1개를 삭제하고 배열 반환

const newComments = [...comments.slice(0, index), ...comments.slice(index + 1)]; // spread 연산자를 활용해서 splice 메서드 사용 대체