将数组中多个对象的同名属性值取出合并成新数组

const num = [
    {
      id: 1,
      name: 'abc',
    },
    {
      id: 2,
      name: 'xyz',
    }
]
function getFields(arrnum, field) {
    const resnum = [];
    for (let i = 0; i < arrnum.length; ++i)
    resnum.push(arrnum[i][field]);
    return resnum;
}

const result = getFields(num, "name");
console.log(result);             // ['abc', 'xyz']
console.log(result.join(' '));   // "abc xyz"