understanding api for dummies

As an example:For example, the Android.content.ClipboardManager class is used in the program, and the class is added to the "library" in API 11.(Forgive me, do not understand the Google API document in the added in API 11 here is where to add it?) If there is an expert know, particularly grateful)So in the actual code and run debugging should pay attention to two

Ii. concept model of MFC We have studied the "Domain Model" of WIN32 API and have a comprehensive understanding of it. Next, we will focus on the research of the MFC conceptual model on the app framework.The message response/transfer mechanism in the app framework is the most important. The Hook mechanism is closely related to the Message response/transmission mechanism, which is based on the former. 1. Ho

- (void) viewdidload {[Super viewdidload]; //additional setup after loading the view, typically from a nib.Uiimageview*imageview = [[Uiimageview alloc]initwithimage:[[uiimage imagenamed:@"Appiconimage"] [imagewithrenderingmode:uiimagerenderingmodeautomatic]];//automatically select render mode depending on where the picture is locatedUiimageview*imageview1 = [[Uiimageview alloc]initwithimage:[[uiimage imagenamed:@"Appiconimage"] [imagewithrenderingmode:uiimagerenderingmodealwaysoriginal]];//the i

Java.lang.objectThe object class is the ancestor of all Java classes. Each class uses Object as a superclass. All objects, including arrays, implement methods of this class.You can see that all the classes in the official document are inherited from one layer, and those package names can be found in the SDK installation directory of Android Studio.Lang is a shorthand for language (language)Is the most commonly used package in JavaThe description that contains the common class package Java.lang p

not know how to use QQ, the solution of the same way, both static, but also method methods can structure a variety of types.The basic use of generic methods is explained.Again, if the Show method and the Print method receive a string, can the length of the string be printed? The following display is not possible, once the generic type is used, the variable type is indeterminate, how can you use a specific object method, in case the person type is passed, how can be written str.length (). But so

One.And then demonstrate a simple method. Now there is a need, name, other not. Some people say that it is OK to get getvalue directly. But there are more values here.Value is values, S is a lot. Why isn't the set returned here? The keys are unique, and the values are not necessarily unique, so take a look at the faces here.It is more convenient, but the return is not set, but collection.Java-preliminary Understanding-Common Object

double-row collection. Print the collection and get the keys and values. Connect with an equal sign, indicating that it has a relationship.For the result of the above operation, there are a few comments, the same key, the value will be overwritten.Next, store a few more. The output display is unordered. Do not mean that 2,7,8 is orderly, hashmap is also a hash table, the integer method and the hash table is the same way.the next demonstration is the Delete method, in the Map collection, the cor

different sets of elements of the operation of the same type, increase, delete, check ...In this example, there are two ways to take an element, either keyset, or .... Show keyset first.The set set contains the key type,In fact, the way of writing here is very strange, from the distance, lisi,38 and Beijing three attributes in the collection, the writing method is rather strange, did not read.The hash is unordered and the output is unordered.Now modify the program, for Zhaoliu This object, modi

about collections, classifying them is easier to learn.If the map collection has a method to add, does it receive several parameters? Two parameters are received and V is returned.In the return interpretation, K1 and V1 are key pairs that are stored in. If you save K1 and V2 again, the key is the same, and the new value replaces the old value, and the old value is returned. When storing K1 and V1, what is returned? There is no previous value, which is null. Added to the end, especially simple.H

, ArrayList is half the chance of lengthening. Vetor is a waste of space, but also waste efficiency, ArrayList will be stronger than Vetor.3. LinkedListLink list for short link lists.The set, as long as it is not vetor, is unsynchronized because of its high efficiency.What are the characteristics of a linked list? How do arrays store elements? Cut the space into smaller squares and store the elements in. How to store it in? An array opens up a space, with a corner mark that stores elements accor

insert has changed.$set (Name,value);Sets the DOM element property value. Name: Property name, Value: property values.Property:$attr;Element properties.Using code:If just learn Ng's small partners feel that after reading this can say understand the instructions, the beast is on his knees hehe, for instructions this piece, really need to write more to really understand these content and usage ... This summary article about the instruction does not have much direct use of the code, but each of th

ng API Learning for Beasts--$interpolate and $parse$interpolateCompiles a string into an interpolation function. The HTML compilation service uses this service to complete data binding.The $interpolate comes with an optional fourth parameter, allornothing. If Allornothing is true, the interpolation function will return undefined unless all embedded expressions are evaluated as not undefined.Using code:{{Value}}$parseConverts an angular expression to a

IOS---Uicollectionview understanding and common API translation Uicollectionview 1. Layout parameters must be set 2. Register the Cell Usage is similar to the UITableView class. Automatic reuse must be registered for initialization. Using Uicollectionview must implementUICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayoutThese three agreements. The composit

One.I'm done with the map collection, by the way, little things.A common subclass of the map collection:Hashtable research is data structure, hash in 1.0 out, there is no table. At that time, single-column collections were only vectors, and double-row collections were hashtable. The internal structure is a hash table. is synchronous. HashMap and Hashtable are different, the efficiency is no longer said. is a HashMap API note that is not synchronized.H

,txt2.value,txt2.value]) //e=[txt1.value,txt2.value] console.log ("Messageposttowork") }txt2.onchange =function () {_ This.postmessage ([Txt1.value,txt2.value,txt2.value]) //e=[txt1.value,txt2.value] console.log ("messagepostto Work ") } _this.onmessage=function (s) {//received data e result.textContent=s.data; }} OnMessage = function (e) {//e receives worker.postmessage-passed parameter var s = (e.data[2]*e.data[1]);var workerresult = "Result:" + S;PostMessage (Workerresult); Worker.onmessage t

classes, in which style_fields = {' Field ': ' Ueditor '} and then adding the Modeladmin class to the corresponding registration object, you can use the Rich Text editor when you edit the field in xadmin background. To get back to the point, Djangoueditor also needs to define the required field in model as Ueditorfield, which inherits from TextField, which has the upload path configuration for pictures and attachments, but does not give the upload path configuration of the video directly, Then

Angular.bind (Obj,fun,args)Obj: Object fun: Function arg: function to pass parameters (can be omitted).Explanation: Dynamically binding a function to an objectFunction: Implement call Data modularization.Demo:var Func = function (a) { This.a=a;}var obj=New Func (1); var fun=angular.bind (obj, function (i,j) {alert (this.a+i+j)},4,2); Fun (); //7 var fun=angular.bind (obj, function (i,j) {alert (this.a+i+j)}); Fun (a); //3 var fun=angular.bind (obj, function (i,j) {alert (this.a+i+j)},2); Fun (3

, because each item has the same name property, only the first item is returned[note] Only Ie8-ie11 browser supportdocument.all ()Before Dom Normalization, IE4 introduced the document.all[] collection to represent the elements in all documentsNow that the Document.all method has been deprecated, to achieve a similar effect, you can use the document.getElementsByTagName (' * ') method, which indicates that all elements are matchedAt lastThe Getelementsbyname () method is not commonly used, plus t

+ ')); if (InArray (array,classstr)) { removeclass (OBJ,CLASSSTR); } Else { addclass (OBJ,CLASSSTR); }}style>. CB{Color:Blue;}style>DivID= "Test">Test textDiv>ButtonID= "BTN1"onclick= "addclass (test, ' CB ')">AddButton>ButtonID= "BTN2"onclick= "Containsclass (test, ' CB ')?" alert (True): Alert (false) ">ContainsButton>ButtonID= "Btn3"onclick= "removeclass (test, ' CB ')">RemoveButton>ButtonID= "Btn4"onclick= "Toggleclass (test, ' CB ')">ToggleButton>In-depth

One.Then the previous section of the example to expand the description, the first question mark in the form of writing the whole is the following. What type is a subclass of object.In the example in the previous section, the person is fixed and its subclasses can be arbitrarily changed, but the upper bound is fixed.For the lower bound for example, demonstrate that the iterator generics and get iterator generic collections are consistent. Iterators are taken over, and what is passed is, of course