JavaScriptで配列を結合 - Qiita

//deptsマスタ const depts = [ { deptNo: 1, deptName: '総務' }, { deptNo: 2, deptName: '経理' }, { deptNo: 3, deptName: '人事' }, ]; //membersマスタ const members = [ { name: 'foo', deptNo: 1 }, { name: 'boo', deptNo: 2 }, { name: 'hoge', deptNo: 3 }, ]; //ループしながら結合 const newMembers = members.map(item => ({ name: item.name, deptname: depts.find(value => value.deptNo === item.deptNo).deptName }) ); //配列の中身を表示 c