learn c# in one day and learn pdf

keyword, which indicates that this is a mutation method. call method calculates interest, invokes its instance 10_ 000.00 interest1 call method to calculate interest, we cannot use 10_ 000.00 instance calls, but requires a double interest2 interestby2 is the mutation method that directly alters the variable interest2 interest2.interestby2 () After the statement call is complete, the variable interest2 The value of called InterestBy3 method calculates the interest,

the unpacking, the code is modified as follows:Print (Emp.dept!.comp!.name)However, there is a drawback to the display of unpacking, if a link in the optional chain is Nil , it will cause code run-time errors. We can use a more "gentle" way of quoting, using a question mark (? ) to replace the original exclamation point ( ! ), as shown here:Print (Emp.dept?.comp?.name)Welcome to follow Dongsheng Sina Weibo@tony_Dongsheng. Learn about the latest techn

an employee Employee different. Welcome to follow Dongsheng Sina Weibo@tony_Dongsheng. Learn about the latest technical articles, books, tutorials and information on the public platform of the smart Jie classroom650) this.width=650; "title=" 00.png "alt=" Wkiol1bwsd6gjs1raaas2mbeznc134.png "src=" http://s5.51cto.com/wyfs02/M00/ 7c/ae/wkiol1bwsd6gjs1raaas2mbeznc134.png "/>More ProductsIOS,Cocos, mobile Design course please pay attention to the officia

. Learn about the latest technical articles, books, tutorials and information on the public platform of the smart Jie classroom650) this.width=650; "title=" 00.png "src=" http://s1.51cto.com/wyfs02/M01/7C/BF/wKiom1bXmlyyvPsYAAAs2MBEZnc731.png "alt=" Wkiom1bxmlyyvpsyaaas2mbeznc731.png "/>More ProductsIOS,Cocos, mobile Design course please pay attention to the official website of Chi Jie Classroom:http://www.zhijieketang.comSmart-Jie Classroom Forum Web

type. References type extension ConstructorsExample of defining constructors in an extension class:classperson{ varname:stringvarage: intfuncdescription () ->String{ return "\ (name) Age is: \" } init (Name:string,age:int) { self.name=nameself.age= age}}extensionPerson{ //defines the extension type of the person class convenienceinit (name: string) {//Convenient constructor self.init ( Name:name,nbsP;AGENBSP;:NBSP;8) }}letp1=person ( name: "Mary") //calls the constructor of the two parameter,

want to let the error spread, you can use try! statement. Modify the above code as follows://querying all Data Methods Funcfindall () throws->[Note]{ guardlistData.count>0else{ //throws "no data" error. throwDAOError.NoData} returnlistdata}funcprintnotes () { letdatas=try!findall () ① fornoteindatas{print ("Date:\ (note.date!) -content:\ (note.content!) ") }}printnotes () ② Code printnotes () The function does not declare a throw error and does not need to be called when calling it Try ke

() Let Hostnames:cfarray = Cfhostgetnames (host, nil)!. Takeunretainedvalue ()Welcome to follow Dongsheng Sina Weibo@tony_Dongsheng. Learn about the latest technical articles, books, tutorials and information on the public platform of the smart Jie classroom?More ProductsIOS,Cocos, mobile Design course please pay attention to the official website of Chi Jie Classroom:http://www.zhijieketang.comSmart-Jie Classroom Forum Website:http://51work6.c

Every day, Bootstrap must learn the cascade drop-down menu. The main application scenarios include Provincial/Municipal Association menus. If you are interested, refer to this article to introduce the custom bootstrap cascade drop-down menu, the main application scenarios include provincial/municipal associated menus. In this example, the associated menus in other scenarios are also applicable. To be honest

Every day, Bootstrap is a required js plug-in. Bootstrap comes with 12 jQuery plug-ins. With extended functions, you can add more interactions to the site. If you are interested, refer 1. Bootstrap plug-in overview The components discussed in the previous layout components section are just the beginning. Bootstrap comes with 12 jQuery plug-ins, which provide extended functions to add more interactions to the site. Even if you are not a senior JavaScr

The Popover plug-in is required for Bootstrap every day. You can use the Bootstrap data API (BootstrapDataAPI) to fill in the content in the pop-up box. for how to implement the plug-in, see the Bootstrap pop-up box plug-in this article, provides an extended view. The pop-up box (Popover) Plug-In generates content and tags as needed. By default, popovers are placed behind their trigger elements. The pop-up box (Popover) is similar to the Tooltip and

The Button plug-in that is required by Bootstrap every day. You can use the Button plug-in to add some interactions, such as controlling the Button status or other components (such as the toolbar) create a Button group. If you are interested, refer to the Button described in the Bootstrap Button chapter. By using the Button plug-in, you can add some interactions, such as controlling the Button status or creating Button groups for other components (suc

The sixth day of php learning objective: to learn how to add, delete, and modify data Mysql_query ($ exec );This statement can execute all the operations. The difference is that the SQL statement $ exec Add: $ exec = "insert into tablename (item1, item2) values ('". $ _ POST ['item1']. "',". $ _ POST ['item1']. ")"; Delete: $ exec = "delete from tablename where ..."; Modify: $ exec = "update tablename

Dictionaries are also referred to as associative arrays or hash lists in other programming languages:The key of a dictionary can be any type, usually a character or stringElement access via key: meta-sequence set, variable type container, variable length, support for heterogeneous, nestedDisplay columns:{Key1:value1,key2:value2,...}{} Empty DictionaryDictionaries can be nested inside dictionaries, such as:Dictionaries add elements that can be added directly in a d[x]=value wayThe unpack operatio

# on branch master# changes to be committed:# " git reset HEAD " to Unstage) # #new file: LICENSE# modified: readme.txt Now, the state of staging area becomes this:　　　　　So, the git add command is actually putting all the changes you want to commit to staging area (Stage). 　　(5) Then, execute git commit to commit all staging area changes to the branch at once:" Understand how stage works " 2675 insertions (+100644 LICENSE(6)git status:$ git status# on branch masternothing

Next, after installing the Nodejs, install Express and execute the following commands sequentially1.npm-g Install Express;2.npm-g Express-generator;3. Use Express-v to see if the installation is successful;4. If successful, use Epxress demo directly, create a folder, will automatically create express-related files;5.CD demo;6.NPM Install;7.NPM start;8. Enter localhost:3000 in the browser, you will see the following to represent the success of the demoExpressWelcome to ExpressOne

, render devices (context) and swap chains (swap chain).3. Create a render target.4. Setting the viewport (viewport)5. Start rendering6. Rendering the Model7. Clear the screenCode ListingInclude the basic Windows header files and the Direct3D header Files#include Shader.shaderstruct vout{ float4 position:sv_position; Float4 Color:color;}; Vout Vshader (float4 position:position, Float4 color:color) { vout output; Output.position = position; Output.color = color; return output;}

;Background-image:gradient (...);/*Not recommended*/background-size:25px;background-size:50%;background-size:Auto 50px;background-size:Auto 50%;/*feasible*/background-size:25px 50px;background-size:50% 50%;}In particular, it is not recommended to use the gradient px auto together, because Firefox 8 cannot be repeated before rendering, and for browsers that do not implement the Firefox 8 rendering feature, the exact size of the element that specifies the background is not known.IE9 and above are

Events that JavaScript must learn every day, javascript events In fact, this article was written quite early. However, due to the bug in sf storage, I wrote a lot and the results were not saved. I think it is a great pity that I did not finish writing this article, today, I just gave it a try, and I just made an end article for my javascript learning summary. Here, we will mainly discuss js-related events -

Web Links:What to learn on the second day of PHP

CompareTo in the interface comparable () method to determine whether two objects are equal and to sort the objects in the collection according to each property condition, and can help to remove duplicates if the caller is greater than the argument return positive represents ascending, and vice versa represents descending4 , TreeSet the custom sort (Comparator )Custom sorting is achieved by creating a new class to implement the comparable method in the comparator interface to achieve the custom