Question

我已经尝试了一切，但无法做到这一点，不确定自己在做什么错...

我有一个数组项要传递给rest提供者...它所做的就是返回查询结果

我如何获取它存储值并将新值附加到this.events？显然，目前它仅返回测试3的信息

事件被声明为事件：可观察；

var arrInfoToFetch = ["Test 1", "Test 2", "Test 3"];

for (let i = 0; i < arrInfoToFetch .length; i++) {
  this.events = this.rest.getInfo(searchDate,arrInfoToFetch[i]);
}

Answer 1

首先，请注意代码中的多余空间：arrInfoToFetch .length将其修复为：

var arrInfoToFetch = ["Test 1", "Test 2", "Test 3"];

for (let i = 0; i < arrInfoToFetch.length; i++) {
  this.events = this.rest.getInfo(searchDate,arrInfoToFetch[i]);
}

第二，该事件仅返回三个，因为为您的事件分配了数组中的当前值：

 for (let i = 0; i < arrInfoToFetch.length; i++) {
      this.events = this.rest.getInfo(searchDate,arrInfoToFetch[i]);
    }

events将始终包含Test 3的值。您应该做的是，创建一个新数组并将结果推入内部。

 var arrInfoToFetch = ["Test 1", "Test 2", "Test 3"];
 var arrInfoRecieved = new Array(arrInfoToFetch.length);
    for (let i = 0; i < arrInfoToFetch.length; i++) {
      arrInfoRecieved.push(this.rest.getInfo(searchDate,arrInfoToFetch[i]));
    }

编辑observable<any>的评论：

 var arrInfoToFetch = ["Test 1", "Test 2", "Test 3"];
        for (let i = 0; i < arrInfoToFetch.length; i++) {
          this.events
            .fromEvent(this.rest.getInfo(searchDate,arrInfoToFetch[i]))
            .map(() => [arrInfoToFetch.length]) 
            .scan((list, items) => list.concat(items), [])
            .subscribe(x => console.log(x));
        }

如何将值附加到this.events

1 个答案: