specific values. For example:
Android: textcolor = "? Android: textdisabledcolor"
Note that this is very similar to resource reference, except that we use "? "Prefix replaces "@". When you use this tag, you provide the name of the property resource, which will be searched in the topic, so you do not need to display the Declaration type (if the Declaration, the form is? Android: ATTR/Android: textdisabledcolor ). Besides using the resource identifier to query the value in the topic instead of th
The meaning and function of PTR in assembly language
MoV ax, BX; is to assign the value of the Bx register "in" to ax, because both are word type, so there is no need to add "word"MoV ax, word PTR [BX]; is the data stored in the place where the memory address is equal to the value of the Bx register, and is assigned to ax. Because we only provide a memory address and do not know whether it is byte or word that we want to assign to ax, we need to us
Understanding the meaning of @ class in objective-C
In objective-C, when a class is used to another class and the referenced pointer needs to be created in the Class header file,
The following code is used:
A. H file
C code
# Import "B. H"
@ Interface A: nsobject {
B * B;
}
@ End
For the sake of simplicity: Class A is a reference class, and Class B is a referenced class. The implementation file of Class A is not considered here.
There are
difficult, several other CPUs with independent intellectual property rights even have no chance to survive, not to mention the so-called experts, over the past few years, college students in the Microelectronics curriculum can compile their own instruction sets through the open source code on the Internet. Is it useful?
5. Where is the significance of godson?
Some people say that since the industrialization of the dragon core is very difficult, since the dragon core is unlikely to replace intel
Zheng20080712
Answer a user's question.
Semantics is a difficult journey.
Meaning, only some specific things can be done,AlgorithmThe accuracy rate is limited. It takes a lot of time and patience to increase the accuracy.
However, it is a space without a ceiling.
There is a lot of water in it. Global experts like the cloud, but once they enter, they will not be capped, and there is great room for development.
It is d
different platforms, however, most implementations are related to various platforms. Since each C compiler has many differences and subtle differences in C support and understanding, it has ansi c; ansi c (subjective intention) it specifies the specific meaning of each element of C language and compiler implementation requirements in detail, introduces a new function declaration method, and sets up the standard form of standard library. Therefore, th
error, that is, it is also redirected to the file, the final result is that both the standard output and errors are redirected to the file.Command 2> 1> File2> 1 the standard error copies the standard output, but the standard output is still on the terminal.> The output is redirected to the file, but the standard error is still on the terminal.
Use strace to see:1. Command> file 2> 1The key System Call Sequence for implementing redirection in this command is:Open (File) = 3Dup2 (3, 1)Dup2 (1
Linux Kernel and some other open-source code often encounter such code:
do{ ...}while(0)
Such code is not a loop at first glance. Do... while has no meaning at all on the surface, so why should we use it like this?
In fact, do {...} while (0) is much more effective than beautifying your code. I checked some information and summarized the following advantages:
1. Help define complex macros to avoid errors when referencing:
For example, s
testsequence print_any B1
Match with is really powerful, especially when the set is used as a branch. however, this is misleading, that is, the head above. Tail is not the header and bit in the linked list we understand. It is actually a placeholder symbol here. of course, this is because of the symbolic name, and the head and tail of the list are misleading:
let listOfList = [[2; 3; 5]; [7; 11; 13]; [17; 19; 23; 29]] let rec concatList l = match l with | head :: tail -> he
Meaning of make mrproper and mrproper
Before compiling a project in Linux, make mrproper is usually used to delete the files and configuration files generated before compilation and backup files. The differences between mrproper and distclean and clean are as follows, the makefile in the root directory of the Linux kernel source code has a clear explanation:Help:@ Echo 'cleaning targets :'@ Echo 'clean-remove most generated files but keep the config a
This article provides a detailed analysis of the differences between VC6X86 and VC9X86 in PHP and the meaning of NonThreadSafe. For more information, see PHP 5.3.0, however, there are several different versions available for download. That is, VC6 X86 and VC9 X86.
First, let me answer:
What is VC6?VC6 is compiled by the legacy Visual Studio 6 compiler.
What is VC9?VC9 is the Visual Studio 2008 compiler, which is compiled by Microsoft VS editor.So
As ruby is a pure object-oriented language, everything is an object. methods are objects and classes are objects ..., therefore, self has many environments. Only by distinguishing the meanings of self in different environments can we better understand the meaning of the program.I. Top Level ContextRuby codePuts selfPrint out main, which indicates the default Object main.2. In the definition of class or module:In the definition of class and module, sel
(Integer.tobinarystring (c));Output is 1001101001101100SummaryThis section describes the nature of char, which is fixed at two bytes, is actually an integer that represents the Unicode number of the character, the character not within the 65536 number is not represented by a char, and requires two char.Let's review all the previous chapters and sort out the ideas.We say that the so-called program, is mainly to tell the computer what data to do what the operation. In the 1th section we describe
Configuring the JDK environment variables1, new variable name: java_home, Variable value: C:\Program files\java\jdk1.7.0 (variable value is JDK installation path)2, open path, add variable value:%java_home%\bin;%java_home%\jre\bin ()3, new variable name: CLASSPATH, Variable value:.; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar (note the first one.)Note:1,. Represents the current path,%java_home% is referring to the previously specified java_home;2,java_home indicates the JDK installation pat
, show myexception (I wrote) inherited from its parent class exception (System-written)This field is used to hold the "age illegal" string, but it is private in the parent class, and you can only assign it this way.Obviously the error message you gave was not thrown by the compiler at all. Specifically, to see the Java write source codeObviously only the private field in the parent class is assigned a value, and the exception class construct of a parameter you write makes sense.First we only loo
Ask the meaning of a wordpress statement $ templates = array ();
If (''! ==$ Name)
$ Templates [] = "header-{$ name}. php ";
$ Templates [] = 'header. php ';
This program judges whether $ name is null. if not, assign $ templates [] "header-{$ name}. php"
But then $ templates [] = 'header. php'; then templates is finally header. php.
What is the role of the previous judgment?
Reply to discussion (solution)
Consult th
In the smarty template file tpl, what is the meaning of "| h" next to the variable name when writing and outputting? smarty | h
For example:
" class="box60" style="; ime-mode: active;"> What is h after the variable in red?
Reply to discussion (solution)
| Pipeline (borrow operating system terms)Pass Template variables to functions
Well, thank you. that is to say, "| h" is used in this way? Can you be specific? I'm a newbie, just now PHP.
$ ArrF
In mysql, what is the meaning of: id and: id gt; $ orderid? $ Agentid = pdo_fetchcolumn ('select agentid from '. tablename ('shop _ order ').'
Where id =: idLimit 1', array (
': ID' => $ orderid
));
In mysql, what does id =: id and ': ID' => $ orderid mean?
: Is id a placeholder?
$ Orderid is a parameter?
Reply to discussion (solution)
SQL command select agentid from '. tablename ('shop _ order'). 'where id =: id limit 1In: id
I-inject ---- invest L-loyal ---- loyal o-observant ---- heart V-Valiant ---- brave e-Enjoyment ---- Joy Y-Yes ---- willingness o-obligation ---- responsibility U-unison ---- harmony
Therefore, love is investment, loyalty, care, courage, Joy, willingness, responsibility, and harmony.
I haven't said it yet, but I did think about I lovey ou! Responsibilities!
I-inject ---- Input
Investment: There are many concepts involved in this investment. There are people you love and all your feelings, so th
When debugging CGI today, it is clear that the CGI program has been executed and the final result is correct, but the page is not refreshed. The test results in FireFox2.0 are normal, but IE6 is not refreshed! After careful investigation, we found that the cgi page is linked to
Let's take a look at the meaning of void (0) in JavaScript:
In JavaScript, void is an operator that specifies to calculate an expression but does not return a value.The form
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