角度:如何将一个数组复制到另一个数组?

像这样试试

setOrders() {
        this.cloneOrders= [...this.orders];
    }

您需要.push以向数组中添加项,

this.orders.forEach((order: any) => {
       this.cloneOrders.push(order);
 });

setOrders() {
        this.cloneOrders= [...this.orders];
}

如果你想做深度克隆-

let cloned = this.cloneOrders.map(x => Object.assign({}, x));

orders 到 cloneOrders ,你需要推动它 命令 克隆目

setOrders() {
        this.orders.forEach((order: any) => {
                this.cloneOrders.push(order);
        });
    }

我们可以使用扩展运算符使用ES6

orders = [
 {'id': PROCESSING,'displayName': 'Processing'},
 {'id': SHIPPED,'displayName': 'Shipped'}
];

cloneOrders = [];

setOrders(){
  this.cloneOrders= [...this.orders];
}