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Variable Description:$$ Shell自己PID（ProcessID） $! Shell背景上次执行Process的PID $? 命令的结束代码（返回值） $- 使用Set命令设定的Flag一览 $* 全部參数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出全部參数。 [emailprotected] 全部參数列表。如"[emailprotected]"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出全部參数。 $# 加入到Shell的參数个数 $0 Shell本身的文件名称 $

this problem. Given a bag with a maximum of coins, determine the most fair, division and between two persons. This means difference between the amount of each person obtains should to be minimised. The value of a coin varies from 1 cent to cents. It ' s not allowed to split a single coin. Input Line A and the number of problems N, followed by N times: A line with a non negative an integer m() indicating the number of coins in the bag Line A and

From: Http://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levelsQuality of Servicewhat is quality of Service?The quality of Service (QoS) level was an agreement between sender and receiver of a message regarding the Guarant Ees of delivering a message. There is 3 QoS levels in MQTT: At the most once (0) At least once (1) exa

the selector, let's take a look at the weights.The weight of the label is 1, and the weight of the class selector is 10,id the maximum value of the selector is 100. For example, the following code:/ * Weighted value is 1*/ / * Weighted value is 1+1=2*/ / * Weighted value is

not on the line?! "When ~ ~ ~" Vegetable worm: (hand holds eight centimeters diameter wok, tendon) ... Are you an idiot?-_-## (we're going to have to keep the guards.) How many tables do we have, three missing ones? Input The first line of a positive integer N (1 Output The sum of the greatest "likes". Ideas for solving problems My first reaction was to backtrack and then tle--| | | In fact, this is a very typical

Installing ganglia# Gmond-t | Tee/usr/local/etc/gmond.confGmond:error while loading shared libraries:libpcre.so.1:cannot open Shared object file:no such file or directoryWorkaroundExecute the following command:whereis libpcre.so.1Shown below:libpcre.so: /lib64/libpcre.so.0 /usr/local/lib/libpcre.so.1 /usr/local/lib/libpcre.soThen establish the connection:ln -s /u

$ file name and path$1,$2 parameter 1, parameter 2$# The number of arguments passed to the script or function $$ current shell process ID $? judge execution succeeded or not 0 for success [email protected] Pass all parameters of a script or function$* Pass all parameters of a script or function${}Note: [Email protected] and the $* 's All P

All articles about database indexing will tell you not to Jianjian the word index. But the fact that these articles will not tell you is:The index is very useful if the value of this field in the table is extremely uneven, and you need to query for less distributed records. For example, if there are 10 million records in a table, and a record with a status of 0 will probably have 100, then if you want to q

Http://dadekey.blog.51cto.com/107327/119938 Let's first write a simple script and then explain the meaning of each variable. # Touch variable # Vi variable The script content is as follows: #! /Bin/sh Echo "number: $ #"Echo "scname: $0"Echo "First: $1"Echo "Second: $2"Echo "argume: $ @" Save and exit Grant the script execution per

--- The error occurred in sqlmap/adinfo. xml.--- The error occurred while applying a parameter map.--- Check the insertadinfo-inlineparametermap.--- Check the parameter mapping for the 'clicks' property.--- Cause: Java. SQL. sqlexception: parameter index out of range (1> Number of parameters, which is 0 ).Caused by: Java. SQL. sqlexception: parameter index out of range (

the remaining capacity of v-c[i] backpack", the maximum value can be obtained is F [ I-1][v-c[i]] plus the value obtained by placing the item in article I w[i].Publicclassknapsack{publicstaticvoidknapsack (int[] V,NBSP;INT[]NBSP;W,NBSP;INTNBSP;C,NBSP;INT[][]NBSP;M) { /**v[]w[]c is an array of values, weights, and backpack capacities, respectively NBSP;NBSP;M[I][J] Indicates that there are i~n items, the backpack capacity is the maximum value of J. *

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, using the rules, the most valuable items are first loaded (assuming there is sufficient capacity), and then the next most valuable item, so continue. 　　This strategy is not guaranteed to get the optimal solution. The second guideline selects from the rest of the items the smallest item that can be loaded into the backpack so that it continues until the condition is not met. 　　The optimal solution may not be obtained under normal circumstances. The third is the value density (value-to-weight ra

weapons and equipment. with the explosion of apps, there are also a variety of development patterns on the market, both for developers and for customers, time and cost are two factors that must be considered. Million Violet technology will be through an example to everyone to resolve the best app development model. Agenda 13:30-14:00 Sign-in (can receive small gifts) 14:00-15:20 apicloud: 30 days, App startups from 0 to

Read the source code of monitorserver and record some experiences. Start with the main function and start with the following code lines: 1 struct sigaction sa;2 sa.sa_handler = SIG_IGN;3 sigaction( SIGPIPE, sa, 0); I have never used it before. I don't know why I ignored the sigpipe signal, so I searched for it and explained it as follows: When writing a socket program in Linux, if you try to send it to a

Original: 0 yuan expression Design 4-chapter 1 Introduction interfaceExpression Design is a member of the expression family and a great helper for blend and the webIn this chapter, I will introduce the basic interface of expression Design 4. ?Introducing the expression Blend 4 for a while, let's have some new flavors!?Expression Design is a member of the expression family and a great helper for blend and th

("Contact", new string[] {"Name"}, "name =?", new string[] {searchname}, NULL, NULL, NULL); /c5>4cursor cursor = db.rawquery ("SELECT * from contact where name =?",Newstring[] {searchname});5 if(Cursor.movetofirst ()) {6 //String name = cursor.getstring (Cursor.getcolumnindex ("name"));7String number = cursor.getstring (Cursor.getcolumnindex ("number"));8 Tv_name.settext (searchname);9 Tv_number.settext (number);TenTel = "Tel:" +Number ; One}Else { ATv_name.settext ("404! No

, navigation pathfinding, project development optimization strategies, game transplant and finger touch technology, lighting baking, Ugui, software refactoring ideas, ray, Data persistence technology, Preload and object buffer pool technology, UNITY2D Development Technology, Network Foundation and resource dynamic loading technology.As a translatorMore than 10 years of software, game development and teaching experience, with deep language Foundation.