按照 Markus 的回答,在较新版本的 JS(我认为是 ES6)中,您可以更简单地使用箭头函数和Rest Parameter创建一个“结构”工厂,如下所示:
const Struct = (...keys) => ((...v) => keys.reduce((o, k, i) => {o[k] = v[i]; return o} , {}))
const Item = Struct('id', 'speaker', 'country')
var myItems = [
Item(1, 'john', 'au'),
Item(2, 'mary', 'us')
];
console.log(myItems);
console.log(myItems[0].id);
console.log(myItems[0].speaker);
console.log(myItems[0].country);
运行结果如下:
[ { id: 1, speaker: 'john', country: 'au' },
{ id: 2, speaker: 'mary', country: 'us' } ]
1
john
au
你可以让它看起来类似于 Python 的 namedtuple:
const NamedStruct = (name, ...keys) => ((...v) => keys.reduce((o, k, i) => {o[k] = v[i]; return o} , {_name: name}))
const Item = NamedStruct('Item', 'id', 'speaker', 'country')
var myItems = [
Item(1, 'john', 'au'),
Item(2, 'mary', 'us')
];
console.log(myItems);
console.log(myItems[0].id);
console.log(myItems[0].speaker);
console.log(myItems[0].country);
结果:
[ { _name: 'Item', id: 1, speaker: 'john', country: 'au' },
{ _name: 'Item', id: 2, speaker: 'mary', country: 'us' } ]
1
john
au