小编Mat*_*son的帖子

我有一个简单的组件,它每隔几秒就调用一次REST api并收回一些JSON数据.我可以从我的日志语句和网络流量中看到返回的JSON数据正在发生变化,我的模型正在更新,但是视图没有变化.

我的组件看起来像:

import {Component, OnInit} from 'angular2/core';
import {RecentDetectionService} from '../services/recentdetection.service';
import {RecentDetection} from '../model/recentdetection';
import {Observable} from 'rxjs/Rx';

@Component({
    selector: 'recent-detections',
    templateUrl: '/app/components/recentdetection.template.html',
    providers: [RecentDetectionService]
})



export class RecentDetectionComponent implements OnInit {

    recentDetections: Array<RecentDetection>;

    constructor(private recentDetectionService: RecentDetectionService) {
        this.recentDetections = new Array<RecentDetection>();
    }

    getRecentDetections(): void {
        this.recentDetectionService.getJsonFromApi()
            .subscribe(recent => { this.recentDetections = recent;
             console.log(this.recentDetections[0].macAddress) });
    }

    ngOnInit() {
        this.getRecentDetections();
        let timer = Observable.timer(2000, 5000);
        timer.subscribe(() => this.getRecentDetections());
    }
}

我的观点看起来像:

<div class="panel panel-default">
    <!-- Default panel contents --> …

我一直在尝试使用DateTypeScript中的对象来格式化我想要的方式.

我有一个类Module定义为:

export class Module {

    constructor(public id: number, public name: string, public description: string, 
                 public lastUpdated: Date, public owner: string) { }

    getNiceLastUpdatedTime(): String {

        let options: Intl.DateTimeFormatOptions = {
            day: "numeric", month: "numeric", year: "numeric",
            hour: "2-digit", minute: "2-digit"
        };

        return this.lastUpdated.toLocaleDateString("en-GB", options) + " " + this.lastUpdated.toLocaleTimeString("en-GB", options);
    }
}

当我使用以下代码调用该方法时:

    let date = new Date(1478708162000); // 09/11/2016 16:16pm (GMT)
    let module = new Module(1, "Test", "description", date, "test owner");
    console.log(module.getNiceLastUpdatedTime());

我最终在控制台中打印了以下内容:

'9 …

我目前有一个应用程序，它从用户那里获取起点和终点并向谷歌地图方向 API 发送请求，例如：https://maps.googleapis.com/maps/api/directions/xml?key=my_key8&origin=M460PU&destination=NN36NW&sensor=false&mode=driving&units=imperial&departure_time=1501752779

然后，我们显示给定路线的预计行程时间。用户询问我们是否可以添加直接指向 Google 地图的链接，以便他们可以在地图上看到路线并确保它看起来没问题。

我之前见过这样的问题：Link to Google Maps但这似乎是一个简单的 Google 地图搜索的解决方案，在我的例子中，我想从方向 API 中查看一条路线。

我试图弄清楚是否有一种方法可以从 Directions API 响应中获取数据并将其插入到用户可以点击的http://maps.google.com/maps URL 中。有没有人在这方面取得过成功？

我试图使用d3.js库和TypeScript绘制饼图.我有以下代码:

"use strict";
module Chart {
  export class chart {

    private chart: d3.Selection<string>;
    private width: number;
    private height: number;
    private radius: number;
    private donutWidth: number;
    private dataset: { label: string, count: number }[];
    private color: d3.scale.Ordinal<string, string>;

    constructor(container: any) {
      this.width = 360;
      this.height = 360;
      this.radius = Math.min(this.width, this.height) / 2;
      this.donutWidth = 75;

      this.dataset = [
        { label: 'Road', count: 5500 },
        { label: 'Bridge', count: 8800 },
        { label: 'Tunnel', count: 225 },
      ];

      this.color = d3.scale.category10(); …

TestRepository ***extends*** JpaRespotiroy<Test,Long>

JpaRepository 是一个接口。为什么我们要扩展它而不是像我们在 Java 中所知道的那样实现它？据我所知，接口是实现的，而不是扩展的。

有人可以向我解释一下吗？

我在使用 Mockito 框架的测试中有以下代码来验证是否drawTextOnCanvas()使用正确的参数调用了该方法。

    // The two objects below are mocks.  The rest of the objects used in
    // the call to verify() are plain old java objects I've instantiated elsewhere.
    BufferedImage testImage = Mockito.mock(BufferedImage.class);
    Mockito.when(testImage.getHeight()).thenReturn(10);

    Graphics mockGraphics = Mockito.mock(Graphics.class);
    Mockito.when(mockGraphics.getFontMetrics(Matchers.any(Font.class)))
            .thenReturn(Mockito.mock(FontMetrics.class));


    Mockito.verify(drawingUtil).drawTextOnCanvas(
            Matchers.eq(imageCategory.getWidth()), 
            Matchers.eq(mockGraphics),
            Matchers.any(Font.class), 
            Matchers.eq(Arrays.asList("Test text")),
            Matchers.eq(testImage.getHeight() + 10),
            Matchers.any(FontMetrics.class), 
            Matchers.eq(10));

但是它抛出以下异常：

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Invalid use of argument matchers!
0 matchers expected, 4 recorded:
-> at com.test.package(ExampleTest.java:66)
-> at com.test.package(ExampleTest.java:67)
-> at com.test.package(ExampleTest.java:67)
-> at com.test.package(ExampleTest.java:68)

This exception …

我设置了一个名为“state-changed”的 Azure 服务总线主题，并且它有一个名为“reverb”的订阅。我正在尝试设置一种方法来@JmsListener订阅该主题，但收到错误：

2017-03-22 18:34:41.049  WARN 23356 --- [enerContainer-6] o.s.j.l.DefaultMessageListenerContainer  : Setup of JMS message listener invoker failed for destination 'state-changed' - trying to recover. Cause: The messaging entity 'sb://[MySERVICEBUS].servicebus.windows.net/state-changed' could not be found. TrackingId:d2b442f79e0f44bdb449861ea57155ce_G44, SystemTracker:gateway6, Timestamp:3/22/2017 6:34:37 PM

javax.jms.JMSException: The messaging entity 'sb://[MySERVICEBUS].servicebus.windows.net/state-changed' could not be found. TrackingId:d2b442f79e0f44bdb449861ea57155ce_G44, SystemTracker:gateway6, Timestamp:3/22/2017 6:34:37 PM
    at org.apache.qpid.amqp_1_0.jms.impl.TopicSubscriberImpl.createClientReceiver(TopicSubscriberImpl.java:111) ~[qpid-amqp-1-0-client-jms-0.32.jar:0.32]
    at org.apache.qpid.amqp_1_0.jms.impl.MessageConsumerImpl.<init>(MessageConsumerImpl.java:129) ~[qpid-amqp-1-0-client-jms-0.32.jar:0.32]
    at org.apache.qpid.amqp_1_0.jms.impl.TopicSubscriberImpl.<init>(TopicSubscriberImpl.java:46) ~[qpid-amqp-1-0-client-jms-0.32.jar:0.32]
    at org.apache.qpid.amqp_1_0.jms.impl.SessionImpl.createDurableSubscriber(SessionImpl.java:544) ~[qpid-amqp-1-0-client-jms-0.32.jar:0.32]
    at org.apache.qpid.amqp_1_0.jms.impl.SessionImpl.createDurableSubscriber(SessionImpl.java:59) ~[qpid-amqp-1-0-client-jms-0.32.jar:0.32]
    at org.springframework.jms.listener.AbstractMessageListenerContainer.createConsumer(AbstractMessageListenerContainer.java:870) ~[spring-jms-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.createListenerConsumer(AbstractPollingMessageListenerContainer.java:215) ~[spring-jms-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.initResourcesIfNecessary(DefaultMessageListenerContainer.java:1189) ~[spring-jms-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at …