delete file in hadoop

This article mainly introduces php file operations, including deleting a specified file, obtaining the file name under a folder, and reading the folder name. it involves common php operations on files and directories, for more information about php file operations, see the examples in this article. We will share this w

In web development, we may encounter the need to empty all files in a directory, but not delete subdirectories in this directory (and certainly not delete the deleted root directory). So how do you deal with this method of deleting a file without deleting the directory? The following bloggers will share with you a better solution to this problem. Look at the

Copy Code code as follows: $CN = mysql_connect (' 127.0.0.1 ', ' root ', ' root ') or Die (' Database connect fail '); mysql_select_db (' Test ', $CN); mysql_query ("Set names ' GBK '"); /* Create a database tutorial CREATE DATABASE ' test '; Create data Table Test1 CREATE TABLE ' test '. ' Test1 ' ( ' ID ' INT (4) Not NULL auto_increment, ' title ' VARCHAR NULL DEFAULT ' 0 ', ' Litpic ' VARCHAR (MB) NULL DEFAULT ' 0 ', PRIMARY KEY (' id ') ) ENGINE = MYISAM */ $sql = "SELECT

Response. Buffer = trueResponse. expiresabsolute = now ()-1Response. expires = 0Response. cachecontrol = "no-Cache"'Verification code generationDim yz2Randomize TimerYz2 = int (8999) * RND + 1009)Session ("OK") = yz2%> Delete file ifilename file name ipath file path'File operations'Power by huang_ke@hotmail.com'Delete

The JVM occupies a file that causes the file not to be deleted, and attempting to manually delete the file during debug will prompt "The file has been opened in Java platform se binary." Generally speaking, there are several reasons for Java File.delete failure1. See if it i

:^nscomparisonresult (ID obj1, id obj2) {int object1 = [obj1[@ "Age"]intvalue];int object2 = [obj2[@ "Age"]intvalue];if (OBJECT1==OBJECT2){return nsorderedsame;}else if (OBJECT1{return nsordereddescending;}Else{return nsorderedascending;}}];NSLog (@ "Descending????????????????????????????????????????");for (id obj in array2){nsdictionary* dic = obj;NSLog (@ "%@%@", dic[@ "name"],dic[@ "Age"]);}nsmutablearray* array3 =[nsmutablearray Arraywitharray:array2];for (int i =0; i{nsdictionary* dic = Arr

This article mainly introduces php file operations, including deleting a specified file, obtaining the file name under a folder, and reading the folder name. it involves common php operations on files and directories, for more information about php file operations, see the examples in this article. We will share this w

Scene:When the company asks to uninstall the software, it also contains all the files in a directory. Then go to modify the shell script to delete files, add the deletion of files and folders command (of course, under the root permission)such as: rm-rf/home/vito/****But found running the shell script, dead and alive to delete files under that directory, of course, can not

When a user feels that a folder is not needed, it is dragged directly to the Recycle Bin or to the Del, or right-click menu to select Delete, and they find that some of the files failed to delete, causing the folder deletion to fail. You cannot delete a folder file that is being used by another person or p

We'll remove all sorts of useless junk files from the computer, this can alleviate disk space pressure, but some users in the WIN8 system to delete some files prompted "You need permissions to perform the operation, you need permissions to make changes to the folder" (as shown in the picture), retry can not delete the file, What can I do if I can't

Copy Code code as follows: #!c:\python27\python.exe #-*-Coding:utf-8-*- Import OSImport re From OS import pathFrom Shutil import Rmtree Del_dirs = NoneDel_files = R ' (. +?\.pyc$|. +?\.pyo$|. +?\.log$) ' def del_dir (P):"" "Delete Directory A." ""If Path.isdir (p):Rmtree (P)Print (' D:%s '% p) def del_file (P):"" "Delete a file." ""If Path.isfil

To the users of cool dog software to detailed analysis to share the cool dog Remove OCX file method. Tutorial Sharing: If Kugoo is installed in the default directory, make sure that the computer does not have any windows open: Please type regsvr32 "c:\program Files\kugoo3\kugoo3downxcontrol.ocx" in the start--> run Then you can delete it casually. Well, the above information is small weave

/*** Delete individual files* @param filename of the file to be deleted* @return Single File Delete successfully returns TRUE, otherwise returns false*/public static Boolean DeleteFile (string filename) {File File = new

In the process of using the Dream management site, there is a website File Manager exception, the situation is as follows:1. Delete files in the confirmation file deletion of the dialog box appears on the next two lines of JavaScript code, the content of the code is the contents of the Blank.js file (the

Copy Code code as follows: ? /** * Manipulating file Classes * Example * Fileutil::createdir (' A/1/2/3 '); Test build folder Build a A/1/2/3 folder * Fileutil::createfile (' B/1/2/3 '); Test build file Build a 3 file under the b/1/2/folder * Fileutil::createfile (' b/1/2/3.exe '); Test build file to build

Copy Code code as follows: Import Java.io.File; Import Java.io.FileInputStream; Import Java.io.FileOutputStream; Import java.io.IOException; /** * Java implementation file copy, cut, delete operations * file refers to file or folder * File separator uniform wit

corresponding function, please refer to the PHP manual. Here are just a few things to focus on. And where to pay attention. (This is not in the PHP manual.) II: Directory OperationsThe first introduction is a function read from the directory, Opendir (), Readdir (), Closedir (), using the file handle is opened first, and then the iteration is listed: Copy CodeThe code is as follows: $base _dir = "filelist/"; $fso = Opendir ($base _dir); echo $base

If the special character is '/', skip to the end of the question. If the special character is One 'or a control character or a Chinese character. Please continue reading. A typical solution is: Rm-I some * pattern * that * matches * only * the * file * you * want In this case, rm will confirm before deleting the files that meet your conditions, noIf your shell will change the eighth bit of each character to zero, it will be written in Chinese.The

The server is uploaded with backdoors and files and folders cannot be deleted. This article will solve the following problems:1. You cannot delete or open folders that are not accepted by Windows naming.2. After the folder name is changed, a file named normally cannot be deleted.3. Delete the folder named by NUL4. the folder name is followed by. (A dot), which te

Data There is no easy way to delete a table space data file, the only way is to delete the entire defined table space, the steps are as follows (if the data on this data file is not needed): If the database is running in a non-archive mode: 1. Mount Database-Startup mount 2. Dele