2 1 1 centroids

After the Silverlight 2 Beta 2 release, there have been a lot of changes on the original Beta 1 basis. This article summarizes the changes between Silverlight 2 Beta1 and Beta 2, as well as some of the issues that you may encounter during the upgrade of Silverlight 2.0 Beta

0: Indicates keyboard input (stdin)1: Indicates standard output (stdout), system default is 12: Indicates error output (stderr)Command >/dev/null 2>1 = = Command 1>/dev/null 2>1 1) Com

The shell can often be seen: >/dev/null 2>1Eg:sudo kill-9 ' ps-elf |grep-v grep|grep $1|awk ' {print $4} ' 1>/dev/null 2>/dev/nullThe result of the command can be defined in the form of a%> output/dev/null represents an empty device fileWhere does the > delegate redirect to, for example: echo "123" >/home/123.txt1 mean

Use/dev/null 2>1 to do this. This command means that the standard output and error output are all redirected to/dev/null, that is, all the information that is generated is discarded. Here's a look at the difference between command > File 2>file and command > File 2>1 . The f

1. The array sort method is far from being fully exploited and may be more powerful than the developers think. Many developers may feel that the sort method can be used to do this kind of thing: [1, 3, 9, 2].sort (); // return [1, 2, 3, 9] alert ([

1. [Programming Questions] programming questions 1 Time limit: 1 seconds Space limit: 32768K P is a given two-dimensional set of planar integer points. Defines a point x in P, which is called "maximum" if x satisfies any point in P that is not in the upper-right area of x (the horizontal ordinate is greater than X). Find out the collection of all "maximum" points

in fact to understand the meaning of 2>1, first of all should know that Linux has three kinds of standard input and output, respectively, Stdin,stdout,stderr, the corresponding number is 0,1,2. STDIN is the standard input, the default from the keyboard to read information; stdout is the standard output, the output output to the terminal by default, that is, the monitor and so on; stderr is the standard erro

1. Physics reading (physical read) When the data block is first read, it will be cached in the buffer cache, while the second read and modify the data block in memory buffer cache The following is an example: 1.1 First read: C:\Documents and Settings\paul yi>sqlplus "/as sysdba" Sql*plus:release 9.2.0.4.0-production on Thu Feb 09:32:04 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to:Oracle9i Enterprise Edition Release

1, stitching stringThe concatenation string is one of the most commonly used string operations and supports three ways to stitch strings in a PHP tutorial. is a dot. Delimiter {} operation, there is also a dot equals. = to operate, the dot equals sign can decompose a longer string into several lines to define, which is more beneficial. 2, replacement stringIn the language of PHP, a function named Substr_re

In the process of learning Linux, often see some terminal commands or programs have ">/dev/null 2>1" appear, because have met several times, in order to understand clearly, may wish to spend some time Baidu or Google related knowledge.0: Indicates keyboard input (stdin)1: Indicates standard output (stdout), system default is 12: Indicates error output (stderr)Com

-2.6.828.# add Mhash to the LD library path29.[root@localhost mcrypt-2.6.8]# Export Ld_library_path=/usr/local/lib30.[root@localhost mcrypt-2.6.8]# Ldconfig31.[root@localhost mcrypt-2.6.8]#./configure32.[root@localhost mcrypt-2.6.8]# make make install33.[root@localhost mcrypt-2.6.8]# CD. 2. Download PHP and the corresponding version of PHP-FPM The code is as follows Copy Code

Pre-Export command:[root@powerlong4 ~]# su - oracle[oracle@powerlong4 ~]$ ORACLE_SID=pt1;[oracle@powerlong4 ~]$ expdp \‘sys/systestpd as sysdba\‘ DIRECTORY=dir_dump_t3 FULL=YES DUMPFILE=expdpfull_pd_20150529_02.dmp......1, start importingSet up the pipeline directory on instance 2 first:[[email protected] ~]$ export oracle_sid=pt2; [Email protected] ~]$ Sqlplus/as sysdbasql*plus:Release 11.2. 0.

_pagesize;}set {_pagesize = value;}}/**////Generate Cache Keypublic override string Getcachekey (){Const string Keyformat = "Pager-sc:{0}-fc:{1}-wc:{2}-gc:{3}-sc:{4}";Return String.Format (Keyformat, Selectclause, FromClause, Whereclause, Groupclause, Sortclause);}/**////SQL statement that generates the total number of query recordspublic string Generatecountsql (){StringBuilder sb = new StringBuilder ();S

Crontab-lCrontab-eExecute */5 every five minutes * * * *Executes 0 per hour * * * *Execute 0 */2 per 2 hours * * *Executes 0 0 * * * per dayWeekly Execution 0 0 * 0Monthly execution 0 0 1 * *Annual Execution 0 0 1 1 *Asterisk (*): represents all possible values, such as the

Einstein came up with such a mathematical problem: there is a long ladder, if each step across 2, then the last one, if each step across 3, then the last 2 order, if each step across the 5-order, then the last 4 order, if each step across the 6-order, the last remaining 5 order. Only 7 steps at a time, the end is just the first order of no left. How many steps are there in this ladder? Two ways: Method

Similar title: What version does jquery choose? What version of jquery do you use? jquery IE8 compatible version. What version of jquery is stable? There are currently three major versions of jquery: 1.x: Compatible with ie678, the most widely used, the official only bug maintenance, function no longer new. So for general projects, the 1.x version is available, and the final version: 1.12.4 (May 20,

Sql> host CLS; 1. View the table structure sql> desc table name; For example: DESC dept; View the table structure of the Dept Department table Desc EMP; View the table structure of the EMP employee table 2. Professional Vocabulary Database: A warehouse where data is stored. Stage of data storage experience Artificial stage--long, long ago ... There is a house with a (huge) computer for scientific

Select Platform Oracle Red Hat Linux 4 5 Download the following three files separately (since my machine is 32 bits, here is a 32-bit version of the package, if your machine is 64-bit, please download 64-bit version): 1. Red Hat Oracle Linux 5 (x86, 32-bit), RPM PackageMySQL Server 2. Red Hat Oracle Linux 5 (x86, 32-bit), RPM PackageClient Utilities 3. Red Hat Oracle Linux 5 (x86, 32-bit), RPM Pack

Title: Seek 1+2+...+n, the request cannot use multiplication and division method, for, while, if, else, switch, case and so on keyword and conditional judgment statement (A? B:C) This problem is indeed a bit biased, most people on the internet to give the solution are recursive. public int sum (int n) {if (n==1) return 1