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Javascript calculates the distance between two points on the earth based on the longitude and latitude.

;} This formula is correct in most cases. There is a problem only when dealing with the relative points on the sphere, and there is a correction formula, because there is no need to find it, it can be found on the Wiki. Of course, we all know that the earth is not a real sphere, but an elliptical sphere, so we have the following formula: /** * approx distance between two points on earth ellipsoid * @param {Object} lat1 * @param {Object} lng1 * @param {Object} lat2 * @param {

Introduction to open-source game engines

-games.sourceforge.net/en/index.php? Pagename=projets.html Daimonin MMORPG Http://web2.168180.vserver.de/ Mmorpg is open-source and can be obtained from the download link. Http://www.daimonin.net/index.php? Module = htmlpages func = display pid = 5 Freeyuntop.org Http://www.freedesktop.org/Software/glitz Glitz eg. The home page is relatively simple and you can get the original code. G2 graphical Library Http://g2.sourceforge.net/ It is a cross-language eg. It supports C, Fortran, and Py Perl,

Baidu Map plug-in development using three and jquery function (a.b) sorting, etc.

+") '>imgsrc= ' ${res}/template/002/images/m1.png '>P>"; HTML + = "Li>"; HTML + = "ul>"; HTML + = "Div>"; HTML + = "Divclass= ' Bres '>Div>"; }) $ ("#menuList"). Empty (). append (HTML); //Empty and re-assign value } else{}})}Function:getflatterndistance get distance based on latitude and longitude of two locationsCalculates the distance function getflatterndistance (lat1,lng1,lat2,lng2) { var f = Getrad (parsefloat (LAT1 + lat2)/2) based on the two latitude and longitude degree

Reproduced Android Signature mechanism-a detailed description of the signature process

a lot of examples to find that as long as our KeyStore file alias is debug, Would have reported such a mistake. This should be with the system default signature Debug.keystore in the alias is debug it is related? Did not find the source of Jarsigner, so can only guess, but these three questions to mark here, in case later in the encounter.Note: Android is allowed to use multiple KeyStore to sign the APK, I am not in the Paste command, I created a few keystore to sign the APK:Here I extracted th

Learn the assembly instructions that the Linux kernel often encounters (2)

reprint: http://blog.sina.com.cn/s/blog_4be6adec01007xvh.htmlJnge: The instruction Mnemonic-(a signed number comparison) is less than and not equal to the transfer (equivalent to JL). When SF and the of the Zf=0 are transferred (the direct short transfer within the segment).JNL: Instruction Mnemonic-(signed number comparison) is not less than time-shifted (equivalent to Jge). When SF and of of the same numb

emule How to save a corrupted download file

Always remember to back up your files before you change or fix them! For a variety of reasons, there will always be a corrupted download file, and you may need to download the Sf-iom mod to do the work in accordance with this guide. Download the MoD's compressed package and unzip it to a location on your hard disk. Repair file Links You can find the ed2k link for all the currently downloaded files from the Download.txt file, download.tx

Which instructions will change the sign of the Assembly

http://nannan408.iteye.com/blog/970585 These books have no ready-made answers, they need to be summed up, thanks to BEYOND0769, to make such a good summary. Here are the instructions that will change the flag bit. (1) Addition instruction: ADD, ADC, Inc, Xadd except for the CF logo bit, which affects the condition mark bit. CF, ZF, SF, of Whether the CF highest bit has a rounding DF If two operand symbols are the same and the result symbol is opposi

Calculate the distance between two points on the earth according to the latitude and longitude degree JS implementation code _JAVASCRIPT skills

)-Getrad (LNG2); var s = 2*math.asin (Math.sqrt (Math.pow Math.sin (A/2), 2) + Math.Cos (RADLAT1) *math.cos (RADLAT2) *math.pow (Math.sin ), 2)); s = S*earth_radius; s = Math.Round (s*10000)/10000.0; return s; } This formula is more correct in most cases, and only when dealing with relative points on the sphere, there is a problem. There's a revised formula., because there is no need to find out, can be found on the wiki. Of course, we all know that the earth is not rea

thinkphp using Phpexcel to import files and write to the database

Tags: success height place utf-8 sig Excel import Official Code STCIn reality, we often need such bulk import data in many places, in addition to Phpexcel and CSV and other methods can solve Here is a detailed description of how to use First in the official download installation package extracted to the local, and then copied to save to the vendor directory under the TP framework The HTML page is as follows Here is the back-end code: Public Function column () {$grade =d (' School ')->where (Ar

Package a runnable jar file with Ant (Put the third-party jar package into your own jar package)

http://blog.csdn.net/caiqcong/article/details/7618582spanstyle= "FONT-FAMILY:SIMSUN;FONT-SIZE:12PX;">XML version= "1.0" encoding= "UTF-8" standalone= "no"?>Projectdefault= "Create_run_jar"name= "Create Runnable Jar for Project SeleniumAutomation-3.1"> This file is created by Eclipse Runnable JAR Export Wizard - ANT 1.7 is required - Targetname= "Create_run_jar"> JarDestFile= "C:/users/topcat/desktop/111.jar"filesetmanifest= "Mergewithoutmain"> Manifest>

Google Maps calculates the closest distance between the current position and the remaining multiple points via JS

var childs = var latlng = new Google.maps.LatLng (Value.google_lnglat.lat, VALUE.GOOGLE_LNGLAT.LNG); Value.google_lnglat.lat, value.google_lnglat.lng current position latitude and longitudefunction Getflatterndistance (LAT1, lng1) {var Julichangdu = new Array ();Childs $.each (Childs, function (idx, dest) {//contents of all remaining pointsvar lat2 = dest[' Google_lnglat '][1];var lng2 = dest[' Google_lnglat '][0]var f = Getrad ((number (LAT1) + number (LAT2))/2);var g = Getrad ((number (LAT1)-

Exception in thread "main" org. springframework. Beans. Factory. beancreationexpiration t in spring

This problem occurs when spring is started: Exception in thread "Main" org. springframework. beans. factory. beancreationexception: Error creating bean with name 'helloworldbean' defined in file [C:/WL/spring04-08/src/applicationcontext. XML]: initialization of bean failed; Nested exception is Org. springframework. AOP. framework. aopconfigexception: Couldn't generate cglib subclass of class [class COM. spring. AOP. helloworld]: common causes of this problem include using a final class or a non-

Smooth collaboration between struts and Hibernate

-dbcp.jarCommons-lang.jarCommons-logging.jarCommons-pool.jarDom4j. JarCglib-asm.jarConnector. Jar Go to the/lib directory of the application site. Next, configure the hibernate. cfg. xml file. Public "-// hibernate/hibernate configuration DTD // en"Http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd>JDBC: mysql: // localhost: 3306/yourdatabaseOrg. gjt. Mm. MySQL. DriverYournameYouyrpasswordNet. SF. hibernate. transaction.

JSON object usage includes date formatting

Public static void main (string [] Arg) throws parseexception {Boolean [] boolarray = new Boolean [] {true, false, true };Jsonarray = jsonarray. fromobject (boolarray );System. Out. println (jsonarray );// Prints [true, false, true]List list = new arraylist ();List. Add ("first ");List. Add ("second ");Jsonarray jsonarray1 = jsonarray. fromobject (list );System. Out. println (jsonarray1 );// Prints ["first", "second"]Jsonarray jsonarray2 = jsonarray. fromobject ("['json', 'is', 'easy']");System.

Use Struts-menu _ to implement dynamic menus in detail

Preparations: Download the struts menu and decompress the sample package (some libraries in Struts-menu are not provided, but they are included in the example)Procedure 1. Create a tomcat Project 2. Add webproject support 3. Added struts support. 4. Added support for jstl. 5, copy necessary jar library files to dbmenuweb-inflib log4j-1.2.8.jar velocity-1.4.jar velocity-tools-view-1.0.jar struts-menu-2.3.jar 6, create the menu-config.xml file in the dbmenuweb-INF directory. The content is as

Java factory mode example

();}} (4). Print the factory model: Package stone;Public class testsimplefactory {Private output;Public testsimplefactory (output ){This. Output = output;}Private void dataIn (string MSG ){Output. adddata (MSG );}Private void dataout (){Output. Show ();}Public static void main (string [] ARGs ){Testsimplefactory Sf = new testsimplefactory (outputfactory. Output ());SF. dataIn ("Stone test simple factory 1

Combined primary key generation policy in Hibernate, hibernate primary key

. hashCode (); } } (2) configure the joint primary key using xml "-// Hibernate/Hibernate Mapping DTD 3.0 // EN" Http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd> --> (3) Compile the test program Package com. zgy. hibernate. model; Import static org. junit. Assert .*; Import java. util. Date; Import org. hibernate. Session; Import org. hibernate. SessionFactory; Import org. hibernate. cfg. AnnotationConfiguration; Import org. junit. AfterClass; Import org. junit. Be

Hibernatetemplate in development-type spring

I believe I have used spring +Hibernate developers used the hibernatedaosupport class of spring when writing Dao.You can use the gethibernatetemplate () method to call save (), delete (), update (), and so on.Hibernate session operations are very simple. For example:Gethibernatetemplate (). Save (User );In this case, the following code must be used before we can complete the process without spring:Session session = hibernateutil. getsession ();Transaction Tx = session. begintransaction ();Sessio

Calculate the distance between two points on the earth based on the longitude and latitude. js implementation code

) * Math. pow (Math. sin (B/2), 2 )));S = s * EARTH_RADIUS;S = Math. round (s * 10000)/10000.0; Return s;} This formula is correct in most cases. problems may occur only when dealing with relative points on the sphere,There is a formula for correction.Because there is no need, you can find it on the wiki.Of course, we all know that the earth is not a real sphere, but an elliptical sphere, so we have the following formula:Copy codeThe Code is as follows :/*** Approx distance between two points on

Data communication and network notes-error control protocol at the data link layer

) protocol involves the concept of a sliding window and an abstract concept of a sliding window, it is used to define the sequence range that the sender and receiver care about. The sequence range that the sender cares about is the transmission sliding window, and the sequence receiving sliding window that the receiver cares about. In the automatic Resend Request protocol for N frames, the size of the send sliding window must be less than 2 ^ m (m indicates the length of the window, and the reas

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