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, etc.Navigation bar Window–>preferencesOpen the Preferences dialog box, left navigation tree, navigate to Genera–>content TypesOn the right, find the type of file you want to modify, and I'll take *.java for example.In the default encoding below, enter Utf-8->update->ok in the input boxThe encoding format of the new JSP file in Eclipse. Windows Preferences Web JSP files changes the value of the right encoding to ISO 10646/unicode (UTF-8) and then applies. OK, then the content of the new JSP fil

#description:galaxycd/varfori in$ (Ls/var);doif[-f $i ];then echo "Commonfile." elif[-L $i ];thenecho "Symbolicfile ." elif[-d $i ];thenecho "DirectOry. " elseecho "Othertype" fidone method three:#!/bin/bash# version:0.0.8#author:lcc.org#description:adddirforiin$ ( Ls/var) doif[-f/var/$i ];thenecho "Commonfile" elif[ -l/var/$i ];thenecho "Symbolicfile" elif[-d/var/$i ]; thenecho "Directory" elseecho "Othertype" FidoneExample four: How many listen are in the establish State under the TCP protocol

cache.Workaround: Use the volatile keyword: 1 to ensure that variables are modified so that all threads are visible; 2 block instruction ordering;Volatile is the older keyword synchroized has been optimized very well, do not deliberately use volatileprivate static volatile Boolean bchanged;Sync can solve the visibility, atomic volatile can only solve if the CAS operation is not atomized multi-threaded operation there must be a problem first compare the CAS operations in the Modify compare and s

: The Greenlet module in Python is similar to a thread but not equal to a thread, and requires Greenlet.switch () to switch the calling process manually.If you want to switch automatically, use gevent:gevent to rewrite the time-consuming stuff (functions, classes). So you can only use it inside to achieve the time-consuming operation, such as Gevent.socket (), Gevent.sleep (), to create a co-process With Gevent.spawn (), you need to add a sentence before executing the code gevent.monkey.patch_a

First, the JVM divides the memory structure1. Program Counter: Record method program execution card.2. Local stack: Bring your own. (different OS will have different local method stacks)3. Method Area: We define methods in the class all exist in the method area, divided into static method area, non-static method area.4. Stack memory: Local variables are stored in the method, and local variables disappear as the scope disappears.5. Heap Memory: Stores arrays and objects (something new is put out)

in the previous article, which is not covered here).Five, proceed to line 18th and call the FN function--fn (10) again. Generates the FN (5) context and presses the stack and sets it to the active state. At this point, however, the context of FN (5) is still in memory-there are two contexts in a single scope. Here, the emphasis has been told, and then the scene here will not repeat.The goal is to hope that we can use this example to clarify the context and scope of the relationship. Of course,

value is not modifiable, the immutable object is mutable if the value can be modifiedThe latter (data type) will talk about what is mutable and what is immutable.ComparisonIdentity comparison, type comparison, value comparison x=1y=1x is Y #x与y是同一个对象, is a comparison of ID, that is, identity type (x) is type (y) #对象的类型本身也是一个对象, so you can compare two objects of type identity x = = y #== Compares the values of two objects for equalityContainer: An object that contains a reference to another obje

Initializes the context, and if you do not add this or an error, the cache is cached in the request domain. Hystrixrequestcontext.initializecontext (); Hystrixservicecommand command = new Hystrixservicecommand ("Hello", resttemplate); String execute = command.execute (); Hystrixservicecommand Command1 = new Hystrixservicecommand ("Hello", resttemplate); String execute1 = Command1.execute (); List.add (execute); List.add (EXECUTE1); return list.tostring ();}Request a M

header_len = struct.unpack (' i ', PHONE.RECV (4)) [0] #吧bytes类型的反解 #在收报头 header_bytes = phone.recv (header_len) #收过来的也是bytes类型 header_ JSON = Header_bytes.decode (' utf-8 ') #拿到json格式的字典 header_dic = json.loads (Header_json) #反序列化拿到字典了 total_size = header_dic[' total_size '] #就拿到数据的总长度了 #最后收数据 recv_size = 0 total_data=b " While recv_size　　Five, struct module#该模块可以把一个类型, such as numbers, to a fixed-length bytes type import structres = Struct.pack (' i ', 12345

])) print (L2, id (l2[-1]))3, 2 deep copyImport CopyImport COPYL1 = [One, one, 33]l2 = copy.deepcopy (L1) l1.append (666) print (L1, id (L1)) print (L2, ID (L2))Import COPYL1 = [one, one, [' barry ']]l2 = copy.deepcopy (L1) l1[2].append (' Alex ') print (L1, id (l1[-1])) print (L2, id (l2[-1]))Deep copy is completely independent.L1 = [1, 2, 3]l2 = [1, 2, 3]l1.append (666) print (L1, id (L1)) print (L2, ID (L2))For slices, this is a shallow copy.L1 = [1, 2, 3, 4, 5, 6, [one, 22]]l2 = L1[:]l1.appe

Python encounters the form of *keys, **keys in fact * represents the passing of any of the parameterless parameters, these parameters are accessed by tuple >>> def sum (*keys): ret= 0 for I in keys: ret + = i return ret >>> sum (1,2,3,4,5) * * Represents the sender a named parameter, these parameters are accessed through dict >>> def sum (**keys) : ret= 0 for i,j in Keys.items (): ret + = J return ret >>> sum (a=1

set to nullable null=True) #对于测试models. Set_null, we need to understand, for the basic field settings of the database, like null,max_length These properties, we need to re-generate the data table, #对于on_delete等Django中的附属属性, we can dynamically modify, do not need to regenerate the data table , so if we start without setting null=True (False by default), we need to regenerate the data table #on_delete= models. Set_default, #删除关联数据后, set your own data to the default value, you need to set the Defa

Doe; Expires=thu, Dec 12:00:00 GMT; path=/"; Using this statement does not clear the current cookie, but instead directly adds the cookie above. The first semicolon precedes the cookie key-value pair, the second is the expiration time, and the third belongs to which address.The method for reading cookies is var x = Document.cookie; Gets the string type.The method for modifying cookies is document.cookie= "Username=john Smith; Expires=thu, Dec 12:00:00 GMT; path=/"; The old cookie will be overwr

context is how to obtain it?Flask.request is a localproxy instance that gets a stack top object named _request_ctx_stack: from Import Partial from Import Localproxy def _lookup_req_object (name): = _request_ctx_stack.top if is None: Raise RuntimeError ("xxxxx") return getattr (top, name)The above logic can be used normally, first to look at the process:1: User access generates request 2: When a request is made to _reqeust_ctx_stack the context object of the request, he becomes

() AppendChild (), Removechildren () Attributes ChildNodes returns all child node collections.?? Children return all child element collections Click () Firstchlid () LastChild () getattribute () such as data-* series, RemoveAttribute () Id InnerHTML, InnerText Queryselector Scr

Deep cloning articles a lot, here is recommended Java enhancement-object cloning (replication).The above article is clear-organized, at a glance, but recently encountered in the project of the actual problem is that the object is to be cloned with a total of 207 subclass parent, regardless of the above two ways, it is necessary to modify the class file, more cumbersome.So we try Spring's beanutils.copyproperties and prove that the Copyproperties method is not used for deep cloning. Finally holdi

Recently, younger brother in his own study of Swift, accustomed to writing while writing unit tests while writing logic, in the Xcode environment without unit testing, writing is not a real feeling.As to how to create unit test, how to write, not the subject of this article, because read a lot of Baidu to the swift unit test, has been very graphic introduction to tell you how to write unit test. But the big question is, whether you call the class in your project anyway in the test class and say

1 . Properties File configuration data source First step : Configure propertyplaceholderconfiguerStep two : use ${key}2. JNDI configuration data source First step : Import Driver Packages in TomcatStep two : Configure JNDI in the context.xml configuration fileStep three : Configure the data source3. scope of beans1) Singleton ( single Case ): default2) prototype ( multiple cases )3) Request: valid at one time4) session: valid for the same session5) Global session: Used only in Portlet web apps

The variable promotion only promotes the left side of the equals sign, and the value on the right is not declared in advance . regardless of whether the condition is true or not, the Var and function will be promoted in the judging body . Variables declared by a function can only be declared in advance and cannot be defined Where the code executes to the condition judgment If the condition is not established, the variable or function declared before is still undefine. Cond

a function to process the result, which is the callback function. We can put the time-consuming (blocking) task into the process pool and then specify the callback function (the main process is responsible for executing) so that the main process eliminates the I/O process when executing the callback function, and the result of the task is directly obtained. Only a single process is used to process the data after the callback. For example, the crawler, after the crawl is finished usi