小编mes*_*lds的帖子

给定JavaScript对象中的Array Literal,访问其自己的对象的属性似乎不起作用:

 var closure =  {

         myPic : document.getElementById('pic1'),
         picArray: [this.myPic]
 }    

 alert(closure.picArray[0]); // alerts [undefined]

而通过访问其他JavaScript对象来声明一个数组项似乎有效

 ?var closure1 = {
 ?    
 ?     myPic : document.getElementById('pic1')
 ?}
 ?    
 ?var closure2 =  {
 ?  
 ?        picArray: [closure1.myPic]
 ?}    
 ?    
 ?alert(closure2.picArray[0]); // alerts [object HTMLDivElement]

示例:http: //jsfiddle.net/5pmDG/

零件

templateUrl : 'home.html'
..
providers:      [NavService]
..    
private navService:     NavService,
..

模板

 <li *ngFor="let state of states; let i=index" 
[class.active]="navService.isCurrentState(state)">

<span class="name">{{navService[state].name}}</span>

似乎不起作用,我在这里缺少什么？如何在组件模板中访问我的服务？

我可以删除 apples 目录中的所有文件而不删除目录本身吗？fs-extra API没有描述是否可能。

 fsExtra.remove 'apples/*', ->
    if !err
    # Do stuff

单元测试

import {Goal} from '../../providers/goal/goal';
import {GoalSettingsPage} from './goal-settings';

import {Modal, Alert, NavParams, ViewController, Events} from 'ionic-angular';
import {provide,ReflectiveInjector,Component} from '@angular/core'
import {FormBuilder} from '@angular/common';

import {
  beforeEach,
  beforeEachProviders,
  describe,
  expect,
  it,
  xit, 
  TestComponentBuilder, 
  ComponentFixture, 
  inject,
  async
} from '@angular/core/testing';


describe('Goal Settings', () => {

    it('should display header title: "Some Title"', inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
        return tcb.createAsync(GoalSettingsPage).then((fixture) => {
            fixture.detectChanges();

            var compiled = fixture.debugElement.nativeElement;

            expect(compiled.innerHTML).toContain('ion-title');               
            expect(compiled.querySelector('span'))        .toHaveText('Cancel');
            expect(compiled.querySelector('ion-title')    .innerText).toBe('DrEvil');

        });
  }));

错误消息

TypeError:无法读取未定义的属性"createAsync"

问题

Pascal在这里写道:http://5thingsangular.github.io/2016/04/11/issue-1.html已injectAsync被弃用,所以我如何 …

错误

TypeError:无法读取null的属性"next"

模板调用Observer.next(问题)

import { NavService } from '../../providers/services/nav-service/nav-service';

@Component({
  selector: 'ion-header',
  providers: [NavService],
  template: `
    <ion-navbar>
        <ion-title>{{navService.getCurrentName()}}</ion-title>
        <ion-buttons start>
            <button (click)="navService.goHome()">
                <span primary showWhen="ios">Cancel</span>
                <ion-icon name="md-close" showWhen="android,windows"></ion-icon>
            </button>
        </ion-buttons>
    </ion-navbar>
  `
})

有Observable的服务

import { Platform } from 'ionic-angular';
import { Observable } from 'rxjs/Observable';
import { Injectable, ViewChild } from '@angular/core'

@Injectable()

export class NavService {
private dismissObserver: any
public  dismiss: any

constructor (
    private authService:    AuthService,
    private platform:       Platform
) {
    this.dismissObserver = null;
    this.dismiss = Observable.create(observer …

使用最新的 (Okt 2014) Hadoop 启动时，start-dfs.sh我们看到：

连接到主机本地主机端口 22：运行时连接被拒绝

我希望子组件模板加载到父组件模板中.(由于缺乏更好的措辞,我称之为孩子和父母)

这是我的孩子:

import {Component,Directive, ElementRef, Input} from '@angular/core';
import {IONIC_DIRECTIVES} from 'ionic-angular';


@Component({ 
  selector: '[parentselector]',
  template: '<div>I AM A CHILD</div>',
  directives: [IONIC_DIRECTIVES] 
})


export class ChildPage {
    constructor() {

    }
}

这是我的父母:

@Component({
    templateUrl: 'build/pages/parent/parent.html',
    directives: [ChildPage]
})

和父母的HTML:

<ion-content>
    <ion-slides>
        <ion-slide><parentselector>Parent To Be Overriden</parentselector>
        </ion-slide>
    </ion-slides>
</ion-content>

有什么想法错了吗？

在Angular2组件中,执行时:

console.log (this);

你可以按预期获得所有成员的整个对象,例如

"ComponentName {member1, member2, member_n}"

现在我只想记录ComponentName.怎么实现？

错误

Can't bind to color since it isn't a known property of 'button'.

代码

@Component({
    selector: "nav-next",
    template: `
    <div class="nav-next-directive">
        <button [color]="color" class="primary" [
        </button>
    </div>`
})

预期行为

这个子指令使我们能够在 Angular2-RC4 中从父组件动态设置颜色。Angular2-Final 说这不好。有任何想法吗？

我想解决Python Selenium 中的TimeOutException 。

有时候是这样的：

1.) Open Browser, Call URL
2.) Trying to find Element
2.1) Works sometimes
2.2) Works not sometimes and throws TimeoutException
3.) Should look for other elements

3.)在我们遇到异常2.2)并且 try/catch 不起作用之后，我永远无法到达步骤。

步骤之后3.)还有许多其他步骤。我怎样才能让程序在这个超时时间内运行。当元素不存在时，就会超时。

代码

1.) Open Browser, Call URL
2.) Trying to find Element
2.1) Works sometimes
2.2) Works not sometimes and throws TimeoutException
3.) Should look for other elements

结果

    def getByClass(InputElement, driver):
        getByClass = WebDriverWait(driver, timeout).until(EC.visibility_of_element_located((By.CLASS_NAME, InputElement)))
        return getByClass …