为什么我的数组在函数返回后发生变化？

Question

我有一个函数，我过滤一个数组，并在复选框的帮助下检查对象的属性liked 是否等于一个。

  async getGetLikedMatches(checked){
    if(checked){
      await this.sp.getReleases().subscribe(data => {
        this.allMatches = data;
        this.matches = data;
      });
      this.matches = this.allMatches.filter(match => match.favorit == 1);
      console.log({matches: this.matches, allMatches: this.allMatches}); // matches has correctly 6 
                                                                         // elements
      // after the fuction returns matches == allMatches -> 110 element
      // but why?
    }
    else if (!checked){
      await this.sp.getReleases().subscribe(data => {
        this.allMatches = data;
        this.matches = data;
      });
      console.log(this.matches)
    }

在我的 html 文件中，我遍历了这些匹配项：

        <div class="col-3" *ngFor="let match of matches">
            <img [src]="match.images == '' ? url : getImage(match)"
              alt="matches" 
             style="min-width: 200px; max-width: 200px; max-height: 200px; min-height: 200px;"
             (click)="onDetailView(match.id, selectedType)"/> <br />
        </div>

Answer 1

我认为你错误地使用了 rxjs，试试这个

getGetLikedMatches(checked) {
    this.sp.getReleases().subscribe(data => {
       this.allMatches = data;

       if (checked) {
           this.matches = this.allMatches.filter(match => match.favorit == 1);
       } else {
           this.matches = data;
       }

       console.log({ matches: this.matches, allMatches: this.allMatches });
});

}