JavaScriptの配列とオブジェクト操作 - Qiita

const a = [1, 2, 3, 4, 5]; const b = [6, 7, 8, 9, 10]; //配列の結合 const c = [...a, ...b]; //分割代入 const [d, e, f] = a //rest構文 const [g, h, ...i] = a console.log(...a); // 1 2 3 4 5 console.log(c); // [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ] console.log(d, e, f); // 1 2 3 console.log(g, h, i); // 1 2 [ 3, 4, 5 ] //値の交換 let [x,y,z] = [1,2,3] console.log(x,y,z); // 1 2 3 [x, y, z] = [y, z, x]; console.log(x, y