api programming for beginners

CreateWindow can create a STAITC directly, but this static is opaque, if we set the window background to Gray_brush, then static will obviously have a white background, generally this is certainly very difficult to see.You can set a ws_ex_transparent extension property for static, and then intercept the wm_ctlcolorstatic message in the message callback function, dealing with textcolor and Bkmode, which is the text color and background mode:To set extended properties:1 SetWindowLong (hstatic,gwl_

Document directory Create a buffer Obtain and set buffered data Split and buffer data Copy buffered data Decodes buffered data For the list of articles in this series and the translation progress, see Node. js advanced programming: using Javascript to build scalable applications (〇) This article corresponds to the original article Part 2 Chapter 4: Node Core API Basics: Using Buffers to Manipulate,

Rm () throws IllegalArgumentException, IOException {Fs.delete (New Path ("/aa"), true);}public static void Main (string[] args) throws Exception {Configuration conf = new configuration ();Conf.set ("Fs.defaultfs", "hdfs://hadoopmaster:9000/");FileSystem fs = Filesystem.get (conf);Fsdatainputstream is = Fs.open (new Path ("/jdk-7u65-linux-i586.tar.gz"));FileOutputStream OS = new FileOutputStream ("c:/jdk7.tgz");Ioutils.copy (is, OS);}}Package ZHOULS.BIGDATA.MYWHOLEHADOOP.HDFS.HDFS1;Import java.i

, you can use the try...catch...finally statement to perform exception handling, which is used to catch exceptions caused by an error or to execute a throw statement. Its basic syntax is as follows:try {Here are the statements that may produce exceptions} catch (Error) {Here is the statement that is responsible for exception handling} finally {Here is the export statement}the code above attempts to create a canvas object and gets its context. If an error occurs, you can catch the error and know

Threepath[] Listedpaths = fileutil.stat2paths (status);Fourth Stepfor (Path p:listedpaths){SYSTEM.OUT.PRINTLN (P); }Fifth StepFs.close ();}public static void Getfilelocal () throws IOException, URISyntaxException{The first stepFileSystem Fs=getfilesystem ();Step TwoPath path=new path ("/zhouls/data/weibo.txt");Step ThreeFilestatus filestatus=fs.getfilelinkstatus (path);Fourth Stepblocklocation[] blklocations = fs.getfileblocklocations (filestatus, 0, Filestatus.getlen ());Fifth Stepfor (int i=0

/" + fileName + ". txt");SYSTEM.OUT.PRINTLN ("Merged file name:" +filename+ ". txt");Open the output streamOut = Fs.create (block);Loop 20120917 All files under the date directoryfor (Path p:listedpaths){in = Local.open (P);//Open input streamIoutils.copybytes (in, out, 4096, false); Copying dataClose the input streamIn.close ();}if (out! = null){Turn off the output streamOut.close ();}After looping through all the files in the 20120917-date directory, then 20120918,20120919,,,}}/**** @function

)) {Admin.modifycolumn (TableName, HCD);Admin.modifytable (TableName, Tabledesc);Admin.modifynamespace (NSD);}else{System.out.println (TableName + "not exist");}Admin.close ();} In production development, it is recommended to use a thread pool to dopublic void deletetable (String tableName) throws Masternotrunningexception, Zookeeperconnectionexception, ioexception{Configuration conf = hbaseconfiguration.create (GetConfig ());Hbaseadmin admin = new hbaseadmin (conf);if (admin.tableexists (TableN

(args[1]));//Output path Job.setmapperclass (Scoremapper.class);//MapperJob.setreducerclass (Scorereducer.class);//Reducer Job.setmapoutputkeyclass (Text.class);//Mapper key Output typeJob.setmapoutputvalueclass (Scorewritable.class);//Mapper value Output type Job.setinputformatclass (Scoreinputformat.class);//Set Custom input formats Job.waitforcompletion (TRUE);return 0;} public static void Main (string[] args) throws Exception{string[] Args0 =// {"Hdfs://hadoopmaster:9000/score/score.txt","H

Now in the company overtime, but, do not like the current job, want to go to change to C #, but the foundation is too weak, in hard study. Come onComment on this code another day, then go to move (Jia) Brick (ban) go ...1#include 2 /*3 Get System infomation and Copy to a File4 */5 intMainintargc, TCHAR argv [])6 {7 //File Handle8 HANDLE hfile;9 DWORD Dwwritten;Ten //Char Array to Store the Path of the System infomation One TCHAR Szsystemdir [MAX_PATH]; A //Get System Directory - gets

)).Map(_.split ("::") match { case Array (user, item, rate) = Rating (User.toint, Item.toint, rate.todouble)})Set number of stealth factors, number of iterationsVal Rank= 10Val numiterations= 5//CallALSClass ofTrainMethods, passing in the data to be trained and so on model trainingVal Model=ALS.Train(ratings, rank, numiterations, 0.01)Convert the training data into(User,item)Format to be used as a test model for predicting data (collaborative filtering of model predictions when the incoming(Use

NSize);Hprocess: Handle to the process that contains the ModuleHmodule: The handle of the module to retrieve, and if the parameter is NULL, the function returns the name of the process that called the functionLpbasename: The base name is truncated if the Buffer;buffer space used to receive the module name is not enoughSpace size of Nsize:lpbasename bufferReturn value: The length of the string in copy to Lpbasename is returned if the call succeeds; 0 is returned if the call failsSample program:#

LPARAM) {unreferenced_parameter (LPARAM); Switch(message) { CaseWm_initdialog:return(INT_PTR) TRUE; CaseWm_command:if(LoWord (wParam) = = IDOK | | LoWord (wParam) = =IDCANCEL) {EndDialog (hdlg, LoWord (WParam)); return(INT_PTR) TRUE; } Break; } return(INT_PTR) FALSE;} BOOL CALLBACK Enumwindowsproc (HWND hwnd, LPARAM LPARAM) {Dlong*pdlong = (dlong*) LParam; BOOL benable= (BOOL) pdlong->LParam; if(hwnd! = (HWND) pdlong->WParam) EnableWindow (hwnd, benable); returnTRUE;}R

This time we start Spark-shell by specifying the Executor-memory parameter:The boot was successful.On the command line we have specified that the memory of executor on each machine Spark-shell run take up is 1g in size, and after successful launch see Web page:To read files from HDFs:The Mappedrdd returned in the command line, using todebugstring, can view its lineage relationship:You can see that Mappedrdd was converted from Hadooprdd.Then look at the source code of Textfile:Hadoopfile This met

Below is a look at the use of Union:Use the collect operation to see the results of the execution:Then look at the use of Groupbykey:Execution Result:The join operation is the process of a Cartesian product operation, as shown in the following example:To perform a join operation on RDD3 and RDD4:Use collect to view execution results:It can be seen that the join operation is exactly a Cartesian product operation;The reduce itself, which is an action-type operation in an RDD operation, causes the

::getaddr () {if (IsValid ()) {return Inet_ntoa (M_ADDRESS.SIN_ADDR); } return std::string ();} int SOCKET::GETPORT () const{if (IsValid ()) {return ntohs (m_address.sin_port); } return-1;} static ssize_t readn (int fd, void *buf, size_t count) {size_t nleft = count; ssize_t nread = 0; Char *ptr = Static_castSocketException.h#ifndef socketexception_h_included#define socketexception_h_included//Exception handling Class (the next section will use ...) Class Socketexception{public: sock

(). Return value: Returns ERROR_SUCCESS if the function call succeeds. Otherwise, a nonzero error code is returned.Regdeletevalue () Introduction:Function: Deletes a value below the specified item. Function prototypes: Lstatus regdeletevalue (HKEY HKEY,LPCSTR lpvaluename//point to the name of the value you want to delete.); return value: Returns ERROR_SUCCESS if the function call succeeds. Otherwise, a nonzero error code is returned.DEMO CODE:#include #includeintMainvoid) {long Long, LONG0; HKE

; LONG LParam;} Stlong;//definition of callback functionBOOL CALLBACK Enumwindowsproc (HWND hwnd, LPARAM LPARAM) {Stlong*pdlong = (stlong*) LParam; BOOL benable= (BOOL) pdlong->LParam;if(hwnd! = (HWND) pdlong->WParam) EnableWindow (hwnd, benable);//if the top-level window handle that is currently enumerated is different from the extra information passed by the keynote function (Enumwindos function) to do the specified top-level window handle, then the related enable or enable deactivation operat

Http programming (2) using Apache API implementation, apacheapi Download the jar packageImport java. io. fileOutputStream; import java. io. IOException; import org. apache. http. httpEntity; import org. apache. http. httpResponse; import org. apache. http. client. httpClient; import org. apache. http. client. methods. httpGet; import org. apache. http. impl. client. defaultHttpClient; import org. apache. ht

The output from the WordCount in a previous article shows that the results are unsorted and how do you sort the output of spark?The result of Reducebykey is Key,value position permutation (number, character), then the number is sorted, and then the key,value position is replaced by the sorted result, and finally the result is stored in HDFsWe can find out that we have successfully sorted out the results!Spark API