b w filters explained

the execution, print a line prompt "Please input a number", ask the user to enter a value, then print out the value, and then ask the user to enter a value again, know user input end stopWhile:DoRead-p "Please input a number:" NIf ["$n" = = "End"]ThenExitFiM= ' echo $n |sed ' s/[0-9]//g 'If [-N ' $m '] is not emptyThenecho "It ' s not number,please input a number."ElseEcho $nFiDoneOutput warning when the root directory is on a hard drive with a usage greater than 85%DF |awk ' $6== '/' 'DF |awk

first yield print (OUTPUT1) #这边的output1获得的是yield的返 Output2 = Inst.send (output2) output3 = inst.send (None) output: >>>ok >>G t;100 ==>print (x) >>>50 ==>print (OUTPUT1) >>>30 ==>send (30) First is assigned a value of 30 Post print (first) >>>100 ==>print (output2) ==>output = x==100 >>>none ==>send (None) s Econd is assigned a value of None,print (second) ==>none Each send (params) runs to the yield statement, but the assignment is not executed and only the return value is returned. The assig

of the minimum can be adjusted to where? This is the setting.Window. maxsizE (600,1200) This is the maximum width and height that can be adjusted, refer to minsize brain yourself.3. What do we do when we want to adjust the position of the window when we start? You can use this:Window. Geometry ("300x600+120+100")300X600 indicates that the width and height of the window are the same as the [' width ']/[height '] property of the second section120+100 means that in the desktop (120,100) This coord

function scheme and abandons the latter. Therefore, even if a function does not modify the behavior of an object's value, the Const object cannot invoke it if it does not add the const qualifier to the constant function. However, there are times when we have to let the const function have the ability to modify a member's data value. Some internal state volumes, for example, do not matter to external users, but are useful for the entire object, such as caching-enabled technologies. In the case

; Static{Book2=NewBook ("Static member BOOK2 member variable Initialization"); Book4=NewBook ("Static member BOOK4 member variable Initialization"); } PublicPerson (String msg) {System.out.println (msg); } Book Book3=NewBook ("BOOK3 member variable Initialization"); StaticBook Book4; Public Static voidfunstatic () {System.out.println ("Static modified Funstatic method"); } Public Static voidMain (string[] args) {person.funstatic (); System.out.println ("****************"); Perso

It's mainly about rsync.On-Machine experimentand write some scripts.Here is the script for automatic backup#bak Site and logscd/var/html tar zcf/backup/www_$ (date +%f). tar.gz./wwwCd/app tar zcf/backup/logs_$ (date +%f). tar.gz./logs#bak SYS confCD/ tar zcf/backup/etc_$ (date +%f). tar.gz./scripts/bin/cp/var/spool/cron/root/backup/#rsync data to BakserverRsync-avzp/backup/rsync [Email protected]::backup/--password-file=/etc/Rsync.password#del data 7 days agoFind/backup-type f-name "*.tar.gz"-

value of 5 days 3.DatePart (' W ', ' 2005-7-25 22:56:32 ') returns a value of 2 that is Monday (Sunday is 1, Saturday is 7) DatePart (' d ', ' 2005-7-25 22:56:32 ') returns a value of 25, or 25th DatePart (' y ', ' 2005-7-25 22:56:32 ') returns a value of 206 that is the No. 206 Day of the Year DatePart (' yyyy ', ' 2005-7-25 22:56:32 ') returns a value of 2005 that is 2005 The knowledge about SQL Server date time format conversion string is introduced here, I hope this introduction can have a

, function 1 content (first part), lock, function 2 contents, unlock, Function 1 contents (Part Two), unlock.If the contents of function 1 are not reentrant, and function 2 modifies the operand of function 1, there will be a problem here.Like what. The function 1 is to get the sum of the global int array (set to int a[4] = {1,2,3,4}), the first part is for the first half, and the second part is for the last half part.And if the function 2 causes the int array to change, for example lets a[2] = 0

189 #另外一个例子, can be To comment out the above example and run it again: 191 # training_sets = [192 # [[0, 0], [0]],193 # [[0, 1], [1]],194 # [[1], 0], [1]],195 # [[1, 1], [0]]196 #]197 198 # nn = neuralnetwork (len (Training_sets[0][0]), 5, Len (Training_sets[0][1])) 199 # for I in R Ange (10000): $ # TRAining_inputs, training_outputs = Random.choice (training_sets) 201 # Nn.train (training_inputs, training_outputs) 202 # Print (I, Nn.calculate_total_error (training_sets))　　The end of the la

"); BLOCKED.F (); System.out.println ("Broken out of the blocked call");//outbreak of blocking calls}}public class Interruptiing2 {public static void main (string[ ] args) throws Interruptedexception {thread t=new thread (new Blocked2 ()); T.start (); TimeUnit.SECONDS.sleep (1); SYSTEM.OUT.PRINTLN ("Issuing t.interrupt ()");//t.interrupt ();//Interrupt Thread}}/** * output:waiting for F () in Blockedmutexissuing T.interrupt () interrupted from lock acuisition in F () broken off of blocked call *

from the index in the search results, which will cause null. Supplemental: field.store.yes: Stored field value (field value before the word) field.store.no: No storage, no relationship between storage and index field.store.compress: Compressed storage, used for long text or binary, but performance is damaged Field.index. ANALYZED: Sub-glossary IndexField.Index.ANALYZED_NO_NORMS: The noun is indexed, but the value of field is not saved as usual, but only a byte, which saves spaceFie

Q: I found that when I insert multiple records consecutively in a JSP page, another JSP display page is not displayed in the order in which I inserted them, but instead outputs the table in 26 alphabetical orderA: When using the storage Engine (MyISAM) for full table queries, a table scan is performed, and if the table has not been deleted, replaced, and updated, the query results will be sorted in the order of insertion, if the InnoDB is used as the storage engine When you perform the same oper

and interfaces, and in addition, it holds all references to methods and fields. When a method or domain is referenced, the JVM finds the actual address of the method and domain in memory by executing these references in the constant pool.(heap)The heap contains objects or instances that are created by the program. This area has a very large impact on the performance of the JVM. The garbage collection mechanism deals with this area of memory.Therefore, the class loader loading is actually based

important JS loading hour, which is the product policy accounting methodTotal download Shicheneme promised to calculate the onload hour, such as promised to account for the synchronization load of all the time-loaded resources. If there is a lot of asynchronous foil on the page, you can end the asynchronous foil as the total download hourIv. Functional Monitoring ToolsBecause the method and policy of aggregating data are different, the front-end Function monitoring is divided into two types, no

1, InitComponent initialization part start 2, Defaults:objectdefaults property can contain any of the Name/value property pairs, these properties will be added to each of the elements ... For example, in order to automatically add a width property to each Ext.panel element that the container contains, you should pass: defaults: {width:150}. [JavaScript] View plain copy Ext.onready (function () { var top = new Ext.formpanel ({ Frame:true, Title: ' Multi Column, Nested Layouts and anchor

) { User: = userrequest{} err = json. Unmarshal (data, user) if err! = Nil { return } // if IsMail (user. Mail) { return FMT. Errorf ("Mail format error") } if Isphone (user. Phone) { return FMT. Errorf ("Phone format error") } //TODO return} instance 2, using a pre-defined type, to be judged at parse Time//Userrequest _type userrequest struct { Name string mail mail Phone phone}func AddUser (data []byte) { User: = userrequest

　　 What is php:Php（“Php:hypertext Preprocessor", the acronym for Hypertext Preprocessor) is a widely used, open-source, multipurpose scripting language that can be embedded in HTML, especially for Web development.PHP basic Syntax:PHP scripts can be placed anywhere in the document, starting with 　　　　　　 　　 PHP Syntax Environment1, the standard form PHP variables (variables are containers for storing information):naming rules:1. Variables must start with the $ sign　　　　　　　　2. Variable names must beg

constants for classes and interfaces, and in addition, it holds all references to methods and fields. When a method or domain is referenced, the JVM finds the actual address of the method and domain in memory by executing these references in the constant pool.(heap)The heap contains objects or instances that are created by the program. This area has a very large impact on the performance of the JVM. The garbage collection mechanism deals with this area of memory.Therefore, the class loader load

of the sequence:SELECT ABC. Currval from DUAL;Execution Result: Currval--------------------11 Note: The first call to Nextval produces the initial value of the sequence, which, by definition, knows the initial value is 10. The second call produces 11 because the step of the sequence is 1. Call Currval, which displays the current value 11, without generating a new value. Oracle's analytic functions provide a much quicker way to check gaps. They enable you to still see

, the system date time is obtained with date () and now (), where Datediff,dateadd,datepart is also used in Access and ASP, and the usage of these functions is similar.4. Examples of SQL Server date functions1.GetDate () for SQL Server:select GetDate ()2.DateDiff (' s ', ' 2005-07-20 ', ' 2005-7-25 22:56:32 ') returns a value of 514,592 secondsDateDiff (' d ', ' 2005-07-20 ', ' 2005-7-25 22:56:32 ') returns a value of 5 days3.DatePart (' W ', ' 2005-7-25 22:56:32 ') returns a value of 2 that is