我有一个对象数组,我需要指定唯一的id。为简单起见,我宣布这个ID的全局变量,我在每一个新的对象更新:将全局变量的值赋值给对象
var id_unit = 0,
units = [],
merc = [
{name: 'grunt', id: 0, level: 1, hp: 1, atk: 1, def: 1, deployed: false},
{name: 'big grunt', id: 0, level: 1, hp: 1, atk: 1, def: 1, deployed: false}
];
function buy_unit(type, callback) {
var unit = merc[type];
unit.id = id_unit;//0 + id_unit //new Number(id_unit) //Number(id_unit)
id_unit = id_unit + 1;
units.push(unit);
callback('OK');
}
问题是,当我使用这个功能,ID似乎变得UNIT_ID的ADRESS而不是它值:
buy_unit
unit_id: 0
i: 0 id: 0 level: 1 deployed: false
buy_unit
unit_id: 1
i: 0 id: 1 level: 1 deployed: false
i: 1 id: 1 level: 1 deployed: false
当我所期待的是:
buy_unit
unit_id: 1
i: 0 id: 0 level: 1 deployed: false
i: 1 id: 1 level: 1 deployed: false
为什么UNIT_ID返回它的指针,而不是它的价值?我如何获得价值?
是一个循环中真正的代码,使'id_unit'是在闭合捕捉?见http://stackoverflow.com/questions/750486/javascript-closure-inside-loops-simple-practical-example – RichieHindle