geolocation accuracy

In the daily development process we often need to analyze the behavior of client users, then record these behaviors must be to obtain the client's real IP information, this chapter tutorial, we will explain how to get the client: language, browser,

Copy CodeThe code is as follows: function Getiploc_sina ($queryIP) { $url = ' http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip= '. $queryIP; $ch = Curl_init ($url); curl_setopt ($ch, curlopt_encoding, ' UTF8 '); curl_setopt ($ch,

function Get_ip_place () {$ip =file_get_contents ("http://fw.qq.com/ipaddress"); $ip =str_replace (",, $ip); $ip 2=explode ("(", $IP); $a =substr ($ip 2[1],0,-2); $b =explode (",", $a); return $b;} The above from the open source China to write true

If I ask you what is the value of 0.1 + 0.2 equal? You may give me a white eye, 0.1 + 0.2 = 0.3 ah, then ask? Even kindergarten children will answer such pediatric questions. But you know, putting the same problem in programming languages may not be

Copy codeThe Code is as follows:// For example, if the 7*0.8 JavaScript code is calculated as follows: 5.6000000000000005 // Addition function, used to obtain accurate addition results// Note: The addition result of javascript has an error, which is

Optimizing the configuration of Oracle is very important. An appropriate Optimization Configuration can improve the system performance several times. However, an improper configuration will cause your system problems constantly. By default, Oracle

Please contact me with any Title: http://www.webjx.comweb @ webjx.com reprinted please indicate the source when you registered on a forum, usually have an e-mail address verification function, when you enter an illegal pattern will present some kind

I took the test this morning.Scjp(Sun Certified Java programmers), passeD with 98%. One question is correct, and the others are correct. As you said, the scjp test is relatively simple, but I stillIt took more than one month to prepare, because the

The correct rate, recall rate and F value are the important evaluation indexes of the target in the mixed environment.Consider the definition of these indicators first:Correct rate = number of individuals correctly identified/number of individuals

I looked at the IEEE 754 in detail, and I had a rough idea of the representation and storage of floating-point numbers. However, I am still very curious about PHP's handling of this aspect, and the principle of bcmath implementation. Because the

/^ ([a-z0-9]+ [a-z0-9-]* (?: [a-z0-9]+)]?)? [a-z0-9]+ [A-z0-9-]* (?: [a-z0-9]+)]? (\.us|\.tv|\.org\.cn|\.org|\.net\.cn|\.net|\.mobi|\.me|\.la|\.info|\.hk|\.gov\.cn|\.edu|\.com\.cn|\.com|\.co\. jp|\.co|\.cn|\.cc|\.biz) $/i Match URL: /** *

1. Using forced type conversions First, PHP supports data types such as the following: 1. Integer (整数)2. Float (浮点数)3. String (字符串)4. Boolean (布尔值)5. Array (数组)6. Object (对象) There are also two special types: null (empty),

I have been saving my graduation thesis for two months and the overall structure has been changed twice. I am still not satisfied with it. The general structure is much better now than before, however, there are still a lot of details that need to

Problem: with a [I] Table #include #include #include using namespace std;struct data{int len,a[2002];}a[35],c,p,t;int n,d;data mul(data a,data b){ memset(c.a,0,sizeof c.a); for(int i=1;i>=1; a=mul(a,a); }return p;}data op(data a,int b){

In fact, the difference is not big. I wrote two classes for testing:   Class timecounter { PRIVATE: DWORD start; Public: Timecounter () {start ();} Void start () {start = gettickcount ();} DWORD now () { DWORD end = gettickcount (); Return

If you think the result of IF (0.1*0.1 = 0.01) is true Then you are wrong !! The calculation result is as follows: System. Out. println (0.1*0.1); system. Out. println (1.0-0.9 ); 0.010000000000000002 0.09999999999999998 Cause: A

Select... Like %... % To find MySQLThe text field is a Chinese character, but it is found that it is messy, and many people have encountered such problems. When sorting and searching Chinese characters, the results of Chinese characters are

Copy codeThe Code is as follows: // For example, if the 7*0.8 JavaScript code is: 5.6000000000000005 // Addition function, used to obtain accurate addition results// Note: The addition result of javascript has an error, which is obvious when two

ProgramChange from http://zhidao.baidu.com/question/57378776.html Other reference http://www.vckbase.com/document/viewdoc? Id = 1301   The queryperformancefrequency () and queryperformancecounter () functions should be used for scheduled

If you only use I ++ as a counter, you can skip this post. This post is mainly written by the big data computation and money-related computation comrades. It may be wrong. You are welcome to criticize and point out this post. In many cases, most