小编Yun*_*123的帖子

我想制作一个包含重复元素的数组.例如:

var myArray = ["one", "two", "five"];

当我循环遍历for循环时:

for(var i = 0; i < myArray.length; i++){
  myArray.push(myArray[i]);
}

我的浏览器崩溃了!我没有得到任何有意义的错误.有人可以解释为什么会这样吗？

我尝试对我的输入字段进行验证。

这是我使用的一段代码：

部门组成

import {  
  FORM_DIRECTIVES,  
  FormBuilder,  
  ControlGroup,  
  Validators ,
   AbstractControl   
} from 'angular2/common';




@Component({
    selector: 'my-departments',
    providers: [HTTP_PROVIDERS, DepartmentService],
    directives: [FORM_DIRECTIVES, Alert],
    styleUrls: ['app/department.component.css'],
    templateUrl: 'app/department.component.html',
    pipes:[SearchPipe]

})

export class DepartmentComponent implements OnInit {
    myForm: ControlGroup;
    departmentName: AbstractControl;
    departmentLocation: AbstractControl;

    constructor(private _router: Router, private _departmentService: DepartmentService, fb: FormBuilder) { 

      this.myForm = fb.group({  
        'departmentName':  ['', Validators.required],
        'departmentLocation':  ['', Validators.required]  
      });

      this.departmentName= this.myForm.controls['departmentName'];  
      this.departmentLocation= this.myForm.controls['departmentLocation'];  
    }

DepartmentComponent模板

   <form [ngFormModel]="myForm"  
          (ngSubmit)="addDepartment(newItem)" [hidden]="!showAddView" align="center">
        <div>       
            <label for="editAbrv">Department name:</label><br>
              <input type="text" [(ngModel)]="newItem.departmentName" [ngFormControl]="myForm.controls['departmentName']" > …

我有一个看起来像这样的超时功能:

setTimeout(this.logout, 1000);

登录方式:

  logout() {
    this.auth_token = ""; 
    this.loggedIn = false;
    this.emitLogedInStatusChange();
  }

 isLoggedIn() {
    return this.loggedIn;
  }

  private emitLogedInStatusChange() {
        this.LoggedInStatusChangedEmitter.emit({value: this.loggedIn});
    }

其中事件发射器告诉主组件其中loggedIn的值在哪里更改.问题是这个..emitLogedInStatusChange(); 我收到错误信息:

this.emitLogedInStatusChange is not a function

我的问题是如何在注销中正确调用此函数,以便setTimeout可以工作？

这就是我所说的:

map((res) => { 
 if (res.username === username) { 
   this.auth_token = res.access_token; 
   this.sessionId = res.SessionID;  
   this.loggedIn = true; 
   this.expires = res.expires_in; 
   setTimeout(this.logout, this.expires*1000); 
   this.emitLogedInStatusChange(); 
  }