如何将对象数组转换成类数组？

Question

如何将对象数组从类转换为数组？ 没有循环？

https://repl.it/repls/YellowSuperficialHexagons

export class Lead {
public value =  'val';

public constructor(      init?: Partial<Lead>      ) {
    Object.assign(this, init);
}

public printOk(){
  return this.value + ' ok';
}
}

let arr = [ {'value': '1'}, {'value': '2'} ]

let lead: Lead = new Lead(arr[0]);
console.log(lead.printOk());

const leads:Partial<Lead>[] = arr;

console.log(leads[0].value);

//console.log(leads[0].printOk()); //error

Answer 1

一种或另一种方式，您需要为arr的每个元素调用新的Lead。最简单的方法可能是使用array.map：

let arr = [ {'value': '1'}, {'value': '2'} ];
const leads: Lead[] = arr.map(init => new Lead(init));