I have been using Google Analytics for basic analytics for my web app - just tracking page impressions using javascript calls like this: ga('create', 'UA-XXXXXXXXX-1', 'mydomain.com');ga('send', 'pageview') This approach has always frustrated me because I couldn't reliably capture some server-side events. I have just discovered I can use Measurement Protocol to record events server-side.
我一直在使用Google Analytics对我的网络应用程序进行基本分析 - 只是使用JavaScript调用来跟踪页面展示次数，如下所示： ga('create', 'UA-XXXXXXXXX-1', 'mydomain.com');ga('send', 'pageview') 这种方法总是让我感到沮丧，因为我无法可靠地捕获一些服务器端事件。 我刚刚发现我可以使用Measurement Protocol来记录服务器端的事件。 在我的服务器上记录事件看起来很简单，除了关于cid（clientid）参数... 我的理解是，
I am facing a problem with the IR emitter on my Galaxy S5 running under Android 5.0. Before I updated it to 5.0, my app was perfectly working on my phone but now, the device I am suppose to manage has no reaction. When I click on my app to send an IR code, the led blinks to indicate that the IR manager is activated and I can receive a signal with a IR photodiode connected to my scope. Unfortu
我正在使用Android 5.0运行的Galaxy S5上的红外发射器出现问题。 在我将它更新到5.0之前，我的应用程序完全在我的手机上工作，但现在，我想要管理的设备没有任何反应。 当我点击我的应用程序发送红外代码时，指示灯闪烁表示红外管理器已启动，并且可以接收到与我的示波器连接的红外光电二极管的信号。 不幸的是，我得到的信号的形状与它应该是非常不同的。 我可以补充说，在Android 4.4.2平板电脑上运行的代码仍然可以正常
I have a TIMESTAMP column in a MySQL table which I am accessing through JDBC. On the Java side, I am using JodaTime. I would like to represent all my instants as milliseconds since the Unix epoch. I would just use an integer field, but I want to use the ON UPDATE CURRENT_TIMESTAMP syntax which is only supported for TIMESTAMP/DATETIME types. JodaTime allow me to easily convert between the di
我在通过JDBC访问的MySQL表中有一个TIMESTAMP列。 在Java方面，我使用JodaTime。 我希望将我的所有时间表示为Unix时代以来的毫秒数。 我只是使用一个整数字段，但我想使用ON UPDATE CURRENT_TIMESTAMP语法，它只支持TIMESTAMP / DATETIME类型。 JodaTime允许我轻松地在时代之间的不同表示和毫秒之间进行转换，但是从使用JDBC / MYSQL开始的时间使用毫秒并不那么简单。 有没有什么办法可以让我们JDBC将milliseconds_since
Here is the Java code: public static boolean anyEqual(Object needle, Object... haystack) { if(needle == null || haystack == null) { return false; } if(haystack.length == 0) { return false; } for(Object match : haystack) { if(match != null && needle.getClass() == match.getClass() && needle.equals(match)) { return true; // war
这里是Java代码： public static boolean anyEqual(Object needle, Object... haystack) { if(needle == null || haystack == null) { return false; } if(haystack.length == 0) { return false; } for(Object match : haystack) { if(match != null && needle.getClass() == match.getClass() && needle.equals(match)) { return true; // warning f
All MyService methods are transactional. The junit test below, gets count of items, saves a new item, and gets count of items to make sure that counts has been incremented by 1. public class MyTest extends ServiceTest{ 1. int countBefore = myService.getCount(); //return n 2. myService.add(item); //item is really added to DB 3. int countAfter = myService.ge
所有MyService方法都是事务性的。 在下面的junit测试中，获取物品数量，保存一个新物品，并获得物品数量以确保物品数量增加1。 public class MyTest extends ServiceTest{ 1. int countBefore = myService.getCount(); //return n 2. myService.add(item); //item is really added to DB 3. int countAfter = myService.getCount(); //return n (sometimes n+1) } @Transactional(p
Given the 2 toString() implementations below, which one is preferred: public String toString(){ return "{a:"+ a + ", b:" + b + ", c: " + c +"}"; } or public String toString(){ StringBuilder sb = new StringBuilder(100); return sb.append("{a:").append(a) .append(", b:").append(b) .append(", c:").append(c) .append("}") .toString(); } ? More i
鉴于下面的2个toString()实现，哪一个是首选的： public String toString(){ return "{a:"+ a + ", b:" + b + ", c: " + c +"}"; } 要么 public String toString(){ StringBuilder sb = new StringBuilder(100); return sb.append("{a:").append(a) .append(", b:").append(b) .append(", c:").append(c) .append("}") .toString(); } ？ 更重要的是，由于我们只有3
Assuming String a and b: a += b a = a.concat(b) Under the hood, are they the same thing? Here is concat decompiled as reference. I'd like to be able to decompile the + operator as well to see what that does. public String concat(String s) { int i = s.length(); if (i == 0) { return this; } else { char ac[] = new char[count + i]; getChars(0, count,
假设字符串a和b： a += b a = a.concat(b) 在引擎盖下，他们是同一件事吗？ 这里是concat作为参考反编译。 我希望能够反编译+运算符以查看它的功能。 public String concat(String s) { int i = s.length(); if (i == 0) { return this; } else { char ac[] = new char[count + i]; getChars(0, count, ac, 0); s.getChars(0, i, ac, count); return new String(
I am trying to add Tahoma font to jasper report in my web app. I use font extension mechanism. This exception was thrown: net.sf.jasperreports.engine.util.JRFontNotFoundException: Font 'TahomaFont' is not available to the JVM. See the Javadoc for more details. Here is my font.xml file: <fontFamiles> <fontFamily name="TahomaFont"> <normal>export/fonts/BTahoma
我正在尝试在我的web应用程序中将Tahoma字体添加到jasper报告中。 我使用字体扩展机制。 引发此异常：net.sf.jasperreports.engine.util.JRFontNotFoundException：字体'TahomaFont'不适用于JVM。 查看Javadoc了解更多详情。 这是我的font.xml文件： <fontFamiles> <fontFamily name="TahomaFont"> <normal>export/fonts/BTahoma.ttf</normal> <pdfEncoding>Identity-H&l
tl;dr is there JavaDoc for if s? Intro I am writing an enterprise application for multiple customers. 99% of the code base is shared, but every now and then there is a variant like this: if (user.hasModule(REPORTS)) { ...conditional code... } I would now like to document all these variants for the users. It should be clear from the documentation what happens if I turn on eg. the modu
tl; dr是否有JavaDoc for if s？ 介绍 我正在为多个客户撰写企业应用程序。 99％的代码库是共享的，但是每隔一段时间就会有一个像这样的变体： if (user.hasModule(REPORTS)) { ...conditional code... } 我现在想为用户记录所有这些变体。 从文档中应该清楚，如果我打开例如。 模块REPORTS 。 我相信这个文档应该用JavaDoc方式编写 - 这意味着它应该尽可能接近条件代码。 它可能看起来像这样： /** Enables the
In Python, if I want to do a fold over the operation xor, I can write: reduce(operator.xor, my_things, 0) rather than the more cumbersome reduce(lambda x, y: x^y, my_things, 0) Is there anything like this in the new Java 8 functional features? eg to write something like this myThings.reduce(0, Integer::xor) rather than myThings.reduce(0, (x, y) -> x ^ y) There's Integer#sum(int, i
在Python中，如果我想对操作xor进行折叠，我可以这样写： reduce(operator.xor, my_things, 0) 而不是更繁琐 reduce(lambda x, y: x^y, my_things, 0) 在新的Java 8功能特性中是否有这样的东西？ 例如写这样的东西 myThings.reduce(0, Integer::xor) 而不是 myThings.reduce(0, (x, y) -> x ^ y) 有Integer#sum(int, int) ，这是在包私有IntPipeline ，但对其他数值运算符没有类似的方法。 @Override public final i