sonos explained

new project.4. Defining what to see when you visitOpen the views.py below the project to modify the source code, for example#coding: Utf-8From django.http import HttpResponsedef index (Request):return HttpResponse (U "Welcome to Self-Improvement Academy!")#引入HttpResponse, it is used to return content to the page, just like print in Python, except that HttpResponse is displayed on the page.#我们定义一个index函数, the first parameter must be request, which is related to requests from the Web page, which

the Zookeeper directory　　　　　　　　　　　　Copy this path, and then go to config file to modify this, and the rest do not need to be modified　　　　　　　　　　　　After the configuration is complete, start zookeeper, and in the Zookeeper directory, execute the command: bin/zkserver.sh start　　　　　　　　　　　　View zookeeper status can be seen as a stand-alone node　　　　　　command to enter the client: bin/zkcli.sh　　　　　　To create a command for a node:Create/test "Test-data"　　　　　　View node Command LS/　　　　　　Gets the node comma

Top results ExplainedThe top command features Windows-like Task Manager, but not as intuitive as the task Manager, and provides a brief description of the contents below. Information Line top--command/up-Update time/users-number of users/load average--1 minutes, 5 minutes, average active processes per CPU in 15 minutes Process Line total--total number of processes/running--running process/sleeping--sleep process/stopped--stopped process/zombie--zombie pro

formating context (inline formatting contexts)Not a row-level element is involved in IFC, you can see that the Display property value of Inline-block element will be born row-level box but he will participate in BFC. The Line box participates in IFC. For IFC, the row height is calculated from the highest actual height of the element in the row.Here are some of the IFC's rule applications:1. The line box generally clings to the entire IFC, but is disturbed by float. The float element is located

for them. You can do it yourself by creating a singleton class that you think is necessary; for example If you had a class that provides sounds to other objects in an application, you might make it a singleton. Several Cocoa Framework classes is singletons. They include Nsfilemanager, Nsworkspace, and, in UIKit, UIApplication and Uiaccelerometer. The name of the factory method returning the singleton instance have, by convention, the form Sharedclasstype. Examples from the Cocoa frameworks is S

method (usually named Sharedinstance or Sharedmanager) to check if the static instance declared above is nil, and if so, create a new instance of this class; 3. Rewrite the Allocwithzone: method to ensure that when other people use alloc and Init to try to obtain a new instance, no new instance is generated. 4. Appropriate implementation of Allocwithzone, Copywithzone, Release and Autorelease. The role of Dispatch_once is to execute only one block of code (^{...}) throughout the application li

, for click Dialing) that needs to be done. It consists mainly of two parts, one in response to an HTTP request and the other in response to a SIP request. For the sake of simplicity, I have only defined two classes in the project, one is Testsip.java to handle the SIP protocol related messages, and the other is testwebsip.java to handle the HTTP protocol related messages. As shown in the following:The specific code will not be mentioned, the main simple talk about the process. The user sends th

the following 8 }As for this function being called, it is consistent with the normal cdecl and stdcall call functions.common problems caused by function calling conventionsIf the defined conventions and the conventions used are inconsistent, it will cause the stack to be corrupted, causing serious problems, and the following are two common problems:1) function prototype declaration and function body Definition inconsistent 2) DLL Import function declares different function conventions H

proxy_max_temp_file_size 0; 27 proxy_connect_timeout 90; 28 proxy_send_timeout 90; 29 proxy_read_timeout 90; 30 proxy_buffer_size 4k; 31 proxy_buffers 4 32k; 32 proxy_busy_buffers_size 64k; 33 proxy_temp_file_write_size 64k; 34 }

from the place before C4 branch iss91v2 , to C8, Back in the trunk to master submit the C9 and C10, and then go back iss91v2 to work, submit C11, then, and then came up with a less certain idea, from master the latest submission C10 opened a new branch to dumbidea do some experiments. Figure 3-20. Has a commit history for multiple attribute branches.now, let's assume two things: we finally decided to use the second solution, the one iss91v2 in which we showed the branch to our dumbidea co

The Modelandview category, as its name implies, is an object of model and view in the MVC Web program, but it is only convenient for you to return the two objects at once Holder,model and view are still separate concepts.If you want to return to the model object, you can use map to collect the model objects and then set it to Modelandview, using this version of Modelandview:Modelandview (String viewName, Map model)modelandview () This construction method constructs the Modelandview instance

thrown in a @synchronized block?Answer: Object UnlockedDescription: The role of @synchronized block is generally multi-threaded programming when the object is locked, to achieve the purpose of mutual exclusion, there is an exception thrown when the object is unlocked.57.Is there a memory leak in the following code?Does the following code have a memory leak?@interface foo:nsobject{ ID object;} @property (retain) __strong ID object;-(ID) Initwithobject: (ID) object; @end @implementation foo@sy

process instances, tasks, activity information; Audit: is also the default level of Activiti, saving all process instances, tasks, activities, form attributes; Full: The most complete history, in addition to the information containing the audit level, can be saved in detail, for example: process variables. For several levels, depending on the requirements of the feature, you can turn on full if you need to track details later. 3. Configure the history level3.1 Configuring in XMLCo

maven Original: https://maven.apache.org/guides/mini/guide-naming-conventions.htmlGuide to naming conventions on GroupId, Artifactid and version groupId will Identify your project uniquely across all projects, so we need to enforce a naming Schema. It has to follow the package name rules, "what means." is at least as a domain name control, and can Crea Te as many subgroups as you want. Look Atmore information about the package names. eg. org.apache.maven , org.apache.commons A Good

of the entire taskThe context serves as a bridge between the functions in map and reduce execution, which is similar to the Session object and Application object in the Java Web.Note: It is recommended that resource initialization and release work be carried out separately into the method setup () and Cleanup ().2. Execution orderSetup---->mapper or reducer----->cleanup| |RunSolution: Setup usually does some preparatory work before executing the map function, and map is the main data processing

Toggleinversefilltype (), the final mode is: Filltype. inverse_windingIsEmpty ():p ath is empty and returns true if path does not contain any lines and curves, otherwise false;Isrect (RECTF Rect): Returns True if path specifies a rect, otherwise returns false, if True Rect is not NULL, the RECT is set to the region of path;Computebounds (RECTF bounds,boolean exact): Calculates the region of path and writes the result to bounds if the entire path contains only 0 or 1 points, it will return (0,0

adding extra namespaces. For the sake of recognizing and using functions as the most basic class object in JavaScript, we can do this. Just like any other object, a function can be specified as a property. So we have declared that "hilight" is a Property object of jquery, and any other property or function that we need to expose can be declared in the "hilight" function. Continue later.2.2 Accept Options parameters to control the behavior of the plug- inLet's add features to our plug-in to spec

previous commandEnvironment variables:Path: Command Search PathHistsize: Specifies the command history size (Red Hat series default) echo $HISTSIZEShell: Indicate shellCommand aliases:Alias CLS ' Clear 'Valid only in the life cycle of the current shellRevoke aliasesUnalias + aliasesUnalias CLS#命令替换: $ (Command) ' anti-quote 'Put the results of the implementationecho "The current directory is $ (PWD)."For example, create a file and include the current date:Touch a_$ (date +%f). txtTouch a_$ (dat

) {e.printstacktrace ();} try {//createexceldemo1 (),//} catch (ParseException e) {//e.printstacktrace ();//}}/** * get Excel and parse content to 2007 and above version number Use XSSF to parse * @param file * @throws filenotfoundexception * @throws ioexception * @throws invalidformatexception */public St atic void Getexcelasfile (String file) throws FileNotFoundException, IOException, INVALIDFORMATEXCEPTION{////1. Get Excel frequently using objects//poifsfilesystem fs = new Poifsfilesystem (Ne

the same functionality on the Storm UI interface Deactivate:storm Deactivate Topology_nameWhen a topology is deactivated, all distributed tuples are processed, and the spouts Nexttuple method will not be called. You can also implement the same functionality on the Storm UI interface Activate:storm Activate Topology_nameStart a deactivated topology. You can also implement the same functionality on the Storm UI interface Rebalance:storm Rebalance Topology_name [-W wait_time] [-N worker_count] [-e