javascript crash course

Share a fun web App page Crash tool of course the main is to let everyone look at his principles and look at his structure everyone should guess this. This is the use of a page after the current Div added an active, And then using the CSS to control the effect this is undoubtedly the use of the maximum width of 640 layout similar to the JS framework I have shared 2 such as fullpage.js,slip.js can be found i

performing simple statistical operations on a listLike the Max in C + +, the min function, but this three is quite powerful with traversing the entire list to find the maximum, minimum, and value.Sample code:1 digits = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]2print(min (digits))3pri NT(max (digits))4print(sum (digits))Four, list parsingThe explanation in the code parsing book is that the code for the For loop and the creation of the new element is merged into a single line and the new element is automati

ifAge :4 Print("yout Admission cost is $")5 elifAge :6 Print("Your Admission cost is $")7 Else:8 Print("Your Admission COSR is $")The only thing to note is that Python and Linux pay the shell the same, else if if is shrunk to elif.Four, using the IF statement to process the list　　1. Check for special elements　　In the For loop with an if statement, the sample code is as follows:1names = ['Peter','Mina','Mike']2 3 forNameinchnames:4 ifName = ='Peter':5 Print(Name.title ()

temporarily), it is best to use the INNER join on statement so that you never forget the type of join. Joins are made temporarily at run time, and the more associated tables consume resources, so it's not necessary to don't mess with tables It Pays to experiment As you can see, there are often more than one-to-perform any given SQL operation. And there is rarely a definitive right or wrong. Performance can affected by the type of operation, the amount of data in the tables, whether ind

) REFERENCES appearance (the corresponding primary key field name in the appearance); FK_ID is the name of the foreign key. For more foreign key related content, please refer to foreign KEY constraintsModification of complex table structuresCOMPLEX table structure changes usually require a manual move process involving these steps: Create A new table with the new column layout. Use the INSERT SELECT statement (see Chapter, "Inserting Data," for details of this statement) to copy th

Hope to learn the gospel of the Children of Learning machine, the world's largest AI company Google launched a "machine learning Crash Course", not only the whole Chinese, but also free to listen to OH. The course is 15 hours, the course is compact, so the reader friends, still need you have certain basic knowledge of

default to be within three letters. MySQL has a built-in stop word list , it's the same as the short word, of course, this can also be manually modified, specific methods can search for information, check the document. Many words appear so frequently that searching for them will be useless (returning too many results). As a result, MySQL grants 50% the rule that a word appears in 50% or more rows, which is treated as a deactivated word and is

CREATE TABLE IF not EXISTSOrderTotals (Order_numINT, totalDECIMAL(8,2)); --Open the cursor OPENordernumbers; --Loop through all rowsREPEAT--Get Order number FETCHOrdernumbers intoo; --Get The total for this orderCall OrderTotal (O,1, T); --Insert order and total into ordertotals INSERT intoordertotals (Order_num, total)VALUES(o, t); --End of LoopUNTIL DoneENDREPEAT; --Close the cursor CLOSEordernumbers;END;Who's going to do all this work? Is it a top-level application or a dat

listLet's look at the following code:1names = ['Peter','Mina','Mpeter','Katherine']2My_friends =names[:]3 4 Print('I have a list of my friends:')5 Print(names)6 Print("however Mina have a same list!")7 Print(my_friends)8 Print("But Mike just has both in my list")9Mike_friends = Names[0:2]Ten Print(mike_friends)The principle of copying a list is actually simple:　　Declares a list, and assigns a value, and then declares a list B, and then iterates through list A and passes the value to the end of

this you know what is (and the rules and restrictions that govern them), let's look at View creation: Views is created using the CREATE VIEW statement. To view the statement used to create a view, use SHOW create view viewname;. To remove a view, the DROP statement is used. The syntax is simply DROP VIEW viewname;. To update a view the DROP statement and then the CREATE statement again, or just us E Create OR replace VIEW, which would create it if it does not exist and r

　　first on Demo, interested can try first:http://www.zeakhold.com/crash/　　(Warm tip: Please save the task of other windows of browser before visit, the trick is not responsible for playing the joke ~)　　 things still have to go from A tweet from IT Security tweets™ says:That is to say, this JavaScript code, can let the browser crash and can let the iphone resta

the mapping table to add escape rules, the display of the main call Htmlescape method, We mainly observed that the sensitive angle bracket escape is OK, such as the following a program, I want to be in the page in the line text display The code for the specific escape is as follows:At the same time, because now the input method more do not retain the original full-width function, feel that the full-width input characters are more ugly, with a word2007 easy to convert half-width, full-angle meth

. For example, you can use JavaScript + Greasemonkey to write plug-ins for online web games. Let's talk about my experience and experience in learning JavaScript.Ii. Getting Started 1. Learn about DIV + CSS layout Using DIV + CSS to deploy standard web pages can reduce front-end XHTML code and make the structure clearer. This makes it easy to use JavaScript to operate the DOM. For example, to display a lis

detail. You can skip this section for reference on about 500 pages (JavaScript core reference, client JavaScript reference, and DOM reference. Advanced promotion books: javascript Advanced Programming Emphasize the concept of OPP ideologically, focus on practicality in content, and learn more and more detailed knowledge from it, and pay attention to the solu

The Evolution of asynchronous JavaScript combs the development of JavaScript asynchronous functions, first through the callback function, and then through the promise/a+, generator function, And the future will be the async function. Thank Jingzhung for the translation of the article as follows: Now let's review the evolution of JavaScript asynchronous functions

storage of resources in the response header to add Access-control-allow-origin tags, allowing the specified site to access the resources of the current Site. -----service-side Support 2) H5 solution: message communication is implemented through different pages. 3) WebSocket is a new protocol for H5 that enables Full-duplex communication between the server and the browser, while also allowing Cross-domain Communication. 4) JSONP, The main use of the script tag is not subject to the Same-origin p

Follow me to "JavaScript elevation 3" Third Lecture: 4th ChapterCourse production: Bling, Xing elder brother, 5 years java,3 years front-end course Knowledge: JavaScript, Html, CSS course goal: The front-end system course, gradually go deep, find a front-end work

In our program, the ape world has been circulating this one joke, no women tickets we can new one, no house no tickets no car we are the same new one! Of course, this sounds more like a self-deprecating, after all, we program ape all love self-deprecating, haha, nonsense not to say, today I take you into JavaScript object-oriented this pit! Don't abandon the pit!First, understand the object:Two ways to crea

browser face questions. Includes DOM operations, BOM operations, event bindings, Ajax, and storage for these categories of topics. 6th Chapter Js-web-api (next)explain the specific application of JS in the browser face questions. Includes DOM operations, BOM operations, event bindings, Ajax, and storage for these categories of topics. 7th Chapter Development EnvironmentDuring the interview process, the interviewer may ask questions about the front-end development environment, such as Ide,git, m

Javascript programming (Lesson 5) mouse events (Part 1) With the course going on, fewer and fewer people will be able to follow. I don't know if it's because there aren't many performances, but it's just something to remember, and everyone is not interested. In fact, on the webpage A lot of special effects, most of the actions are implemented using javascript,