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Author: Peter norvig Teach Yourself programming in ten years Http://coolshell.cn /? P = 2250 Why is everyone impatient? When you walk into any bookstore, you will see a long row of similar books next to "Teach Yourself Java in 7 days" (7 days without a teacher, they want to teach you Visual Basic, windows, the Internet, and so on, but it only takes a few days or even hours. I am { Function onclick () { Pagetracker. _

The key to WebSphere Optimization-varies with JDK. This document describes how to set common parameters in ibm jdk. -XMS: Minimum heap size -Xmx: Maximum heap size -Xminf and-xmaxf: Minimum value of available space after GC (garbage collection) -Xmine and-xmaxe: Minimum heap Growth Value -Xmint and-xmaxt: Percentage of garbage collection time in the whole running time. The default value is 5%. If the collection time is less than 5%, it will reduce the heap, and vice versa. In general, as

, Google Analytics regards the traffic as "search traffic ".You need to manually tell Google that the traffic is "direct traffic". The method is similar to the "identifying non-mainstream search engines" mentioned above. In the call code of Google Analytics,Pagetracker. _ trackpageview ();"BeforeAdd the code to identify "direct traffic for search". For example, I want to classify the page views that may be

), or the access is slow. The problem is that our own JS has been waiting for the loading of ga's JS, and will only execute our js after ga's JS loading times out.Instance:The following code uses jquery to send an ajax request (request 126.com) in document. ready ). Modify the host file before testing to make ga js unable to load:Copy codeThe Code is as follows: Monitoring Chart:It can be seen that ga cannot load. After 20 seconds of timeout, we will execute our ajax request. Our ajax request wi

the simulator,All tasks can be completed in vim.We really use Vim as the IDE! Note: I am not a blind fan of CMD. In my opinion, if I really want to develop Android apps, rather than being a bit tricky, IDE is still a little useful: When your project is large and there are many things to manage. Scalable problems may occur when you use Vim to develop programs in any language. When you try to find a bug. Using ddms with eclipse is indeed much more convenient than other methods. So I us

: Reference content is as follows:1. First, Ga. js code is downloaded to the local, such as the GA. js in the http://www.mysem.net/ga.js, the only advantage of doing so is to make ga. js loading speed = site speed. However, as the connection speed of GA increases, and if the GA code is updated after the download, we may not be the latest, so this is basically unnecessary.2. If your website clearly begins with http: //, rather than https. The first part can be written as follows: . (Typ

To perform GC performance tuning, You have to analyze the GC log. When talking about the "human flesh" method, I always feel that the image is not good enough, so that developers or technical directors who do not know about it cannot have an intuitive understanding, this article describes several GC log analysis tools. First {Pagetracker. _ trackpageview ('/outbound/article/www-01.ibm.com ');} "Href =" http

Document directory Problem description Problem troubleshooting Problem description An inadvertent deadlock in the application code can cause a server to hang. for example, a situation in which thread1 is waiting for resource1 and is holding a lock on resource2, while thread2 needs resource2 and is holding the lock on resource1. neither thread can progress.Problem troubleshooting This application deadlock pattern shocould be used only after doing all the steps in{

The last time I introduced IBM's two GC log analysis tools (GMV and pmat), I will talk aboutHpjmeter. Hpjmeter integrates the previous hpjtune function to analyze garbage collection log files generated on HP machines. You can go {Pagetracker. _ trackpageview ('/outbound/article/www.hp.com ');} "Href =" http://www.hp.com/go/java "> Hewlett-Packard Java website free download of the latest version 4.0, of cour

the loading time. If time tracking is deployed, there is another field in the Google Analytics report called implicit count (implicit count). This is used to count interactions. For example, if you click a button 10 times, calculate it once, similar to PV. This value needs to be understood based on different deployments. Use a music station to describe _ trackevent () usage: Pagetracker. _ trackevent ("Music", "play", "Sunshine City ");

Today, in the Blue Whale's website analysis notes, read the Google Analytics Virtual page and event tracking of the two features of the introduction, the two are event tracking (used to record no page browsing user interaction behavior). But after careful comparison there are differences, the specific summary is as follows: 1, the realization principle and way:The virtual page is done through the _trackpageview () function. Event tracking is called the Paget