keesmark

let names = ["太郎", "二郎", "三郎"];

for (let i < names.length; i++) {
  console.log(names[i]);
}

取り出されるのは

太郎
二郎

keesmark

let names = ["太郎", "二郎", "花子", "三郎", '花子', "四郎"];

let result = name.filter(name => name === '花子')；

console.log(result);
//　['花子', '花子']

こうゆうのに主に使う
let nums = [1, 2, 3, 4, 5, 6];

keesmark

let names = ["太郎", "二郎", "花子", "三郎", "四郎"];

let result = name.find(name => name === '花子')；

console.log(result);
//　花子

keesmark

let name = ["太郎", "二郎", "三郎"];

name = [];

中身はこんな感じになる

[]

もう１つのやり方

keesmark

let name = ["太郎", "二郎", "三郎"];

name.splice(1,1）;

中身はこんな感じになる

["太郎", "三郎"]

2こ一気に消すと

keesmark

let name = ["太郎", "二郎", "三郎"];

name.shift(）;

中身はこんな感じになる

["二郎", "三郎"]

keesmark

let name = ["太郎", "二郎", "三郎"];

name.pop(）;

中身はこんな感じになる

["太郎", "二郎"]

keesmark

let name = ["太郎", "二郎", "三郎"];

name.splice(１, 0, "花子");

中身はこんな感じになる

["太郎", "花子", "二郎", "三郎"]

置き換えでは
let name = ["太郎", "二郎", "三郎"];

keesmark

let name = ["太郎", "二郎", "三郎"];

name.unshift("一郎");

中身はこんな感じになる

["一郎", "太郎", "二郎", "三郎"]

数字も同じく
let number = [1, 2, 3, 4, 5];

keesmark

let name = ["太郎", "二郎", "三郎"];

name.push("四郎");

中身はこんな感じになる

["太郎", "二郎", "三郎", "四郎"]

数字も同じく
let number = [1, 2, 3, 4, 5];