art of programming knuth

is generally assigned to a variable variable = setTimeout ("function", interval)Cleartimeout is canceling a function that is waiting to be executed, and this method requires a parameter: cleartimeout (variable)moveelement () function (see the original book for an explanation of the function, which works like jquery's animate)functionmoveelement (elementid,final_x,final_y,interval) {if(!document.getelementbyid)return false; if(!document.getelementbyid (ElementID))return false; varElem =document.

types of nodes, not just the element nodes. almost everything becomes a node, and even spaces and line breaks are interpreted as nodes. 3.NodeType PropertiesYou can use Node.nodetype to get the NodeType property of a node Nodety of ELEMENT nodes The PE property value is 1, the property , the text note document 4. nodevalue properties 5. firstchild and lastchild properties corresponding to childnodes[0] and childnodes[childnodes.length-1 respect

visibility, if a read lock has been acquired by multiple threads, where any thread has successfully acquired a write lock and updated the data, its update is not visible to other threads that acquire a read lock.NO13:NO14:Condition defines a wait/notification type of method that, when called by the current thread, needs to get the lock associated with the condition object in advance. The condition object is created by the lock object (called the Newcondition () method of the lock object), in ot

=document.getelementbyid (' id name '); Returns the element node, where each element node is an object, so the data type returned is an objectThe tag and class methods can iterate through a set of elements with a for loop4, gets and sets the element's attributes , which belong to the element node objectGets the property name of the attribute getattribute, a parameter that needs to be obtained.Set the property SetAttribute, two parameters, need to modify the property name, the modified value.Note

Read JavaScriptDOM programming art notes. For more information, see. 1. Obtain the next element of the current element. The Code is as follows: Function getNextElement (node ){If (node. nodeType = 1 ){Return node;}If (node. nextSibling ){Return getNextElement (node. nextSibling );}Return null;}; 2. Add the page loading method for js externally introduced The Code is as follows: Function addLoadEvent

This article mainly introduces the JavaScript image library of reading notes in JavaScriptDOM programming Art. if you need it, you can refer to the following two methods to change the src attribute of the image: 1. the setAttribute method is an integral part of "level 1st DOM". it can be used to set any attribute of an element node. 2, element. src = source; this is the method before "level 1st DOM" appear

This article mainly introduces the DOM basis of Reading Notes in JavaScriptDOM programming art. For more information, see DOM DOM: Document Object Model; Node Element Node: DOM atoms are element nodes., , And so on. An element can contain other elements. The only element that is not included in other elements isElement Text node: in XHTML documents, text nodes are always contained in element nodes.

functiondisplaycitations () {//get all references varQuotes = document.getElementsByTagName ("blockquote"); //Traversal Reference for(vari=0; i){ //If there is no cite property, continue looping if(!quotes[i].getattribute ("cite"))Continue; //Save cite property varurl = quotes[i].getattribute ("cite"); //gets all the element nodes in the reference varQuotechildren = Quotes[i].getelementsbytagname ("*"); //If there are no element nodes, continue looping

4th: JavaScript Picture LibraryMultiple pictures of the problem, think about doing an example:How event handlers work: Once an event occurs, the corresponding JS code is executed once the element has been added to the event handler function.　The called JS code can return a value that will be passed to the event handler. Generally returns TRUE or FALSE. True event handler function: event occurs false: Event not seenNodetype:1: Element Node 2: Attribute node 3: text nodeNodevalue:element[0].nodeva

GetAttribute SetAttribute Get and Set propertiesGetAttribute Get Properties:Syntax: Object.getattribute (attribute); This method does not belong to the Document object, so it cannot be called with the Document object, but only through the element node object; The setattribute is the same;For example, var paras = document.getelementsbytagname (' P ');Alert (Paras[0].getattribute (' title '))SetAttribute modifying attributes;Object.setattribute (Attribute,value);Example: var shopping = document.g

Fourth Note:How to make an a tag do not jump:DOCTYPE HTML Public "-//w3c//dtd XHTML 1.1//en" "Http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">HTMLxmlns= "http://www.w3.org/1999/xhtml"Xml:lang= "en">Head> Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /> title>Image Gallerytitle> Head>Body> H1>SnapshotsH1> ul> Li> ahref= "Http://www.baidu.com"title= "A Fireworks display"onclick= "return false;">Click to jumpa>//implementation does not jump Li> Li> ahref=

The following is only for individual reading notes, to record the use of pages. Original address: HTTPS://GITHUB.COM/OA414/OBJC-ZEN-BOOK-CN thanks! One, one case problemRefer to the previous single abuse article.Http://www.cnblogs.com/yaann/p/4661909.htmlSecond, class clustersThird, attributeIv. assertionsThrows an exception if the condition is true.Five, the equality ofLiu, CategoriesEightuse of pragmaNine, Block10, Self's circular reference 11. Multiple DelegatesB17-Zen and OBJECTIVE-C

moveelement functionDOCTYPE HTML>HTML>Head>Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8">title>Using timer to realize JS animation effecttitle>style>style>Head>Body>PID= "message">whereP>PID= "Message2">whoa!P>Script> functionPositionmessage () {varElem=document.getElementById ("message"); Elem.style.position= "Absolute"; Elem.style.left= "50px"; Elem.style.top= "100px"; Moveelement ("message", the, -, -); varElem=document.getElementById ("Message2"); Elem.style.posit

Pointer programming art (2) pointer and string The pointer variable size is 4 bytes. Let's look at an example: #include It is found that the address distance between two data types is 8, which is exactly the size of double data (the address gap is the size of the Data Type pointed to by the pointer variable), but it is not the size of the pointer type variable, in fact, we can see that this a

[Programmer programming art] Learning Record 2: Circular shift of left-rotated strings GCD algorithm: (moving phase division/Euclidean Algorithm)GCD is the algorithm used to calculate the maximum public approx. It is the first algorithm of taocp.GCD algorithm flow:First, given two integers m, n (m greater than or equal to N) if less than then directly exchange and then process① Calculate the remainder r = m

«How to manually attach a disk group under VCs | blog homepage | reprint a bitter humor-buy a house» Website related articles | related articles Reprinting the book "deep dive into Oracle" Fun reading in the fifth phase of Library Reading Wei Shu is colorful, Yan Yu xi zi wei Wen youhua, Xiu Yu Bai Yu Two-month introduction to Oracle Your care makes me warm Several books bought today Finally, I received the itpub T-shirt. Oracle entry book recommendation Yesterday, I received Tom's n

JavaScript library for Reading Notes in JavaScript DOM programming art, javascriptdom There are two ways to change the src attribute of an image: 1. The setAttribute method is an integral part of "level 1st DOM". It can be used to set any attribute of an element node. 2, element. src = source; this is the method before "level 1st DOM" appears, and it is valid now. The advantage of "level 1st DOM" is its por

ConcurrenthashmapConcurrenthashmap is composed of the segment array structure and the HASHENTRY array structure.A concurrenthashmap contains a segment array, the structure of segment is similar to HashMap, is an array and a list structure, a segment contains a hashentry array, Each hashentry is an element of a linked list structure, and each segment guardian is an element of the Hashentry array, and when the data for the Hashentry array is modified, it must first obtain its corresponding segment

smooth degradation and progressive enhancement principle smooth degeneration: If you use JavaScript scripts correctly, you can allow visitors to navigate your site without the support of JavaScript in their browsers. This is called stationary degradation (graceful degradation), which means that although some functions are not available, But the most basic operation can still be completed smoothly. progressive enhancement: The Web pages that were created in accordance wit

@ 20:58:43by outputting The results, we can find several problems. After 1.NotifyThread calls the Notifyall () method, Waitthread does not return immediately from the Wait () method.Because of this time Notifythread did not release the lock. 2. Program 61 Line,notifythread the first release of the lock, however waitthread do not make up, and did not grab this lock. Still in blocked state. 3. Until 67 lines. Notifythread Release the lock once again. Waitthread Gets the lock, which returns from W