小编Kaa*_*rde的帖子

如何phrase以及term在不同的Structured查询？

我的CloudSearch域中有这些数据:

{
    "guid": 9,
    "operating_systems": [
        "12345", "123"
    ],
    "manufacturer": "sealand",
    "model": "gaming tree whale plum",
    "identifier": "gaming tree whale plum",
    "type": "computer",
    "created_at": "1982-10-14T14:43:54Z"
}

"model"是类型text,"identifier"是类型literal,"created_at"是类型date.

我们来一些问题:

(phrase field=model 'tree whale')                match
(phrase field= identifier 'tree whale')          no match
(phrase 'tree whale')                            match
(phrase field=created_at '1982-10-14T14:43:54Z') match (this shouldn't match according to docs)

(term field=model 'tree whale')                match
(term field= identifier …

我想处理ThreadPoolExecutor#afterExecute()方法中工作线程抛出的exeptions .目前我有这个代码:

public class MyExecutor extends ThreadPoolExecutor {

    public static void main(String[] args) {
        MyExecutor threadPool = new MyExecutor();
        Task<Object> task = new Task<>();
        threadPool.submit(task);
    }

    public MyExecutor() {
        super(4, 20, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<>(4000));
    }

    @Override
    protected void afterExecute(Runnable r, Throwable t) {
        super.afterExecute(r, t);
        System.out.println("in afterExecute()");
        if (t != null) {
            System.out.println("exception thrown: " + t.getMessage());
        } else {
            System.out.println("t == null");
        }
    }

    private static class Task<V> implements Callable<V> {

        @Override
        public V call() throws …

在阅读Javascript的原型时,我遇到了这种行为,我无法解释.我在chrome的控制台(V8)中测试它.

var fruit = {taste:'good'};
var banana = Object.create(fruit);
console.log(banana.taste); //"good"
console.log(banana.__proto__); //Object {taste: "good"}
console.log(Object.getPrototypeOf(banana)); //Object {taste: "good"}

到目前为止,一切都如预期.但是,如果我这样做:

var drink = Object.create(null);
Object.defineProperty(drink, 'taste', {value:"nice"});
var coke = Object.create(drink);
console.log(coke.taste); //"nice"
console.log(coke.__proto__); //undefined
console.log(Object.getPrototypeOf(coke)); //Object {taste: "nice"}

然后coke.__proto__ === undefined.为什么是undefined第二种情况？

我需要在Android中使用Retrofit尽可能快地发出50个http GET请求.我正在使用OkHttp进行Retrofit.目前改造正在做的不好VS普通的Java ThreadPoolExecutor和HttpUrlConnection:约50秒的改造和30秒为纯HttpUrlConnection对所有50个请求,如果我设置了池大小20 ThreadPoolExecutor和用于改造/ OkHttp我设置okHttpClient.dispatcher().setMaxRequests(20);.

如果我查看logcat,我可以看到Retrofit最多会执行5个并发请求,无论我设置什么,setMaxRequests()而且ThreadPoolExecutor有可用工作线程的并发请求数量.

有什么办法可以让Retrofit变得更快吗？我不想切换到,HttpUrlConnection因为Retrofit非常优雅且易于使用.

编辑1

我尝试向ThreadPoolExecutorOkHttp 提供自定义,但没有时间改进:

OkHttpClient.Builder builder = new OkHttpClient.Builder();
ExecutorService exec = new ThreadPoolExecutor(20, 20, 1, TimeUnit.HOURS, new LinkedBlockingQueue<>());
Dispatcher d = new Dispatcher(exec);
builder.dispatcher(d);
OkHttpClient okHttpClient = builder.build();
okHttpClient.dispatcher().setMaxRequests(20);

编辑2

如果这很重要,我会向同一个端点发出所有请求

如果一个线程中断另一个线程,中断状态是否会立即可见(即它是否有可见性问题)？

最重要的是,我想知道你有没有使用过中断？挥发性布尔标志似乎更可靠

我想创建一个缓存的线程池,但它作为一个固定的线程池.目前我有这个代码:

public class BackgroundProcesses {

    public static void main(String[] args) throws InterruptedException, ExecutionException {
        //ExecutorService threadPool2 = Executors.newCachedThreadPool();
        ExecutorService threadPool = new ThreadPoolExecutor(2, 10, 180, TimeUnit.SECONDS, new LinkedBlockingQueue<>());
        for (int i = 0; i < 800; i++) {
            Callable<String> task = new Task();
            threadPool.submit(task);
        }
    }
}

class Task implements Callable<String> {

    @Override
    public String call() throws Exception {
        Thread.sleep(100);
        System.out.println(Thread.currentThread().getName() + " is ready");
        return "";
    }
}

如果我运行代码,我得到输出:

pool-1-thread-1 is ready
pool-1-thread-2 is ready
pool-1-thread-1 is ready
pool-1-thread-2 …

我是AngularJS noob.我试图实现一个表单,它需要填写所有输入字段,包括文件上传输入.

完全像第一个例子:https://angular-file-upload.appspot.com/

所以我创建了一个简单的表单来测试它:

<form name="myForm">
        <input id="userUpload" ng-model="filename" name="userUpload" required type="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" />
        <input id="userName" ng-model="username" name="name" required type="text" />
        <button ng-disabled="myForm.$invalid" class="btn btn-primary">Ok</button>
    </form>

但这不起作用.确定按钮将永远保持禁用状态.我发现如果我将属性添加ngf-select=""到文件输入字段:

<input id="userUpload" ng-model="filename" name="userUpload" required ngf-select="" type="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" />

然后表单按预期工作.填充两个userName和userUpload输入字段时,确定按钮变为启用状态.我试过谷歌搜索ngf-select但找不到满意的答案.它是做什么的,为什么表格必须按预期运作？

我有带有 MongoDB 的 Spring Web 应用程序。目前我总是从数据库中永久删除数据。

@Repository
public class SessionRepository extends CrudRepository implements SessionService {
  ...
  @Override
  public void insert(Session session) {
    saveRoom(session);
    getTemplate().insert(session);
  }

  @Override
  public void delete(Session session) {
    getTemplate().remove(session);
  }
  ...    
}

将其更改为软删除的好方法是什么？

----------------- 编辑 1 -------------------

我现在明白我应该做什么的逻辑了，感谢 Sarath Nair。但我不确定如何在 Spring 中实现这一点。我有一个 Session 对象：

@Document(collection = "session")
public class Session {

  @Id
  private String id;
  private Date startDate;
  private Date endDate;
//I just put this here
  private boolean deleted = false;

  public boolean isDeleted() {
    return deleted; …

我有一个返回类型为 void 的函数（包括整个函数）：

CREATE OR REPLACE FUNCTION insert_avg_prices(p_county character varying, p_municipality character varying, p_district character varying, p_neighbourhood character varying, p_street character varying, p_number character varying, p_avg_rent decimal, p_avg_sale decimal)
 RETURNS VOID AS
$BODY$
DECLARE
    _precint_id integer;
    _city_id integer;
    _parish_id integer;
    _county_id integer;

    _address_id integer;

BEGIN
    SELECT place_precint.precint_id INTO _precint_id FROM place_precint WHERE place_precint.name = p_neighbourhood;
    SELECT place_city.city_id INTO _city_id FROM place_city WHERE place_city.name = p_district;
    SELECT place_parish.parish_id INTO _parish_id FROM place_parish WHERE place_parish.name = p_municipality;
    SELECT place_county.county_id INTO _county_id FROM …

对我来说，Javascript 中的变量很容易理解：如果一个变量不在局部范围内，那么它就是全局对象中的一个字段。

但是 Javascript 命令呢？如果我只是在文件中编写 Javascript 命令（在任何函数之外），那么 Javascript 引擎将如何解释它？

----- file.js -----
console.log('hai:DDD');
--- end of file ---

它会function用命令创建某种“全局”或“主要”类型的对象然后执行它吗？如果有多个带有代码的文件怎么办？

我猜这个问题只适用于 node.js 因为在浏览器中所有 Javascript 代码都是事件处理程序

我一直在谷歌搜索这几个小时但到目前为止没有运气.

我想获取触摸/点击地图的位置的地址.

据我所知,为了获得地址,我需要反转地理编码坐标.但是我如何首先从地图中获取坐标？