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First, we define the concept of a stream, a stream that can be a kernel object for I/O operations, such as files, Socket,pipe, and so on.Whether it's files, sockets, or pipelines, we can all think of them as streams.We then discuss the I/O operation, through read, we can read the data from the stream, and through write we can write the data to the stream. Now assume a situation where we need to read the data from the stream, but there is no data in the stream (the typical example is that the cli

First, we define the concept of a stream, a stream that can be a kernel object for I/O operations, such as files, Socket,pipe, and so on.Whether it's files, sockets, or pipelines, we can all think of them as streams.We then discuss the I/O operation, through read, we can read the data from the stream, and through write we can write the data to the stream. Now assume a situation where we need to read the data from the stream, but there is no data in the stream (the typical example is that the cli

Blocks Way:Whoever wants something is going to write blocks, get what you want by blocks (return value), and give something to the person who wants it by implementing a function pointer. Of course, it is possible to pass the value, and pass the parameter.Function of Block:The block function is to get the contents of another class through the return value of a method, or to set a value in another class, which in general is to manipulate other classes, and other classes can have some flexibility w

in the serviced component by deriving Intentservice. private final class ServiceHandler extends Handler { public ServiceHandler(Looper looper) { super(looper); } @Override public void handleMessage(Message msg) { onHandleIntent((Intent)msg.obj); stopSelf(msg.arg1); } }" style="border: 0px; display: block;font-family: Consolas, Inconsolata, Courier, monospace; font-weight: bold; wh

Reference article: Decrypt jquery event Core-binding design (i)Reference article: Decrypt jquery event Core-binding design (II)jquery provides the. bind (),. Live (), and. Delegate () Methods for binding and delegate events. On the basis of discussing the internal realization of these methods, this paper shows their advantages and disadvantages and application occasions.Event DelegateExamples of event delegation abound in reality. For example, three colleagues are expected to receive a

box named "S_03_22″"$ ("input[@ name =s_03_22]"). Parent (). Prev (). Text ()The name begins with "S_" and is not terminated with "_r"$ ("input[@ name ^= ' S_ ']"). Not ("[@ name $= ' _r ']")A value that is selected by a radio named radio_01$ ("input[@ name =radio_01][@checked]"). Val ();$ ("a B") finds all child nodes under the a element, including non-direct child nodes$ ("a>b") finds direct child nodes below the A element$ ("a+b") finds sibling nodes behind a element, including non-direct ch

^ ='s _ ']"). not ("[@ name $ =' _ R']") The value of a radio_01 radio. $ ("Input [@ name = radio_01] [@ checked]"). val (); $ ("A B") searches for all subnodes under Element A, including non-direct subnodes. $ ("A> B") Find the direct subnode under Element $ ("A + B") searches for the sibling nodes behind Element A, including non-direct subnodes. $ ("~ B ") Find the sibling nodes behind Element A, excluding non-direct subnodes. 1. $ ("a B") searches for all subnodes under Element A, includin

;spanstyle="font-family: verdana, ‘courier new‘; font-size: medium;" size="4" face="verdana, ‘courier new‘">span style="font-size: 14px; line-height: 21px; white-space: normal;">span>span> jquery Code:$ ("form input")Results:[2. $ ("a>b") Find the direct child node under the A elementExample: Match all the child input elements in the form.HTML Code: 12345678910 form>label>Name:label

Cause:1, this is the front-end interview of the classic questions, to find a job of the small partner to see or help;2, in fact, I have not understood, write this one is to prepare for forgetting, the second is to other know its why do not know the reason why the small partners to reference;Overview:What do you call an event delegate? It also has a name called Event Broker, JavaScript Advanced Programming: Event delegation is to use event bubbling, specify only one event handler, you can manage

?" , where? is a letter, n is a number"? Nyl: Saves the current line and its next n characters to a register?" , where? is a letter, n is a number"? P: Remove the Register?" and place it at the cursor position. Over here? Can be a letter, or it can be a numberNDD: Deletes the current line and its total n lines of text, and places the deleted content in the 1th delete register. Vim Change font July 24, 2011 Sunday 3:35 Under normal vim, the font is nothing to change, bec

the front-end hot deployment, how to operate: just modify the weblogic.xml file, you can: Add the following configuration to the weblogic.xml Development with - Span style= "font-size:13px;font-family: ' Courier New '; color: #3F7F7F;" >virtual-directory-mapping > Span style= "font-size:13px;font-family: ' Courier New '; color: #008080;" >local-path > d:\test_app\ src \webroot local-path >

where the CPU does not allocate a time slice to the thread, that is, the thread pauses). Functions are returned only after the result is obtained. Someone might equate blocking calls with synchronous calls, and in fact he is different. For synchronous calls, many times the current thread is still active, but logically the current function does not return. For example, we call the RECV function in the socket, and if there is no data in the buffer, the function waits until there is data to return

Overview:What do you call an event delegate? It also has a name called Event Broker, JavaScript Advanced Programming: Event delegation is to use event bubbling, specify only one event handler, you can manage all the events of a certain type. So what does that mean? On the Internet, you are talking about the event commissioned by the same example, is to take express to explain this phenomenon, I carefully try to figure out, this example is really appropriate, I do not think of other examples to e