Share a Laravel useful Cache macro, laravelcache macro. Share a Laravel useful Cache macro. laravelcache macro the Cache tool provided by Laravel is very useful. the manual describes some basic usage, such as get, put, forget, and forever, at first, I shared a Laravel useful Cache
Today, I read chapter 1 "interrupt and interrupt handling procedures" and saw the spin_lock and spin_unlock, so I went into some in-depth research.
The spin_lock macro is defined as follows:
# Define spin_lock (LOCK) _ spin_lock (LOCK)
# DEFINE _ spin_lock (LOCK) _ Lock (Lock)
# DEFINE _ Lock (Lock )/
Do {preempt_disable (); _ acquire (Lock); (void) (Lock);} while (0)
# Define preempt_disable () do {} while (0)
# DEFINE _ acquire (x
Ios development-single-sample macro extraction, ios Development Macro Extraction
In daily development, we often use macros, which are essentially replacing the code during compilation.
Example 1:
// ## Variable names that can be used to splice macros
# Define demo (xxx) int # xxx"
Main (){
Int intA = 10;
Int intB = 20;
NSLog (@ "=======% d", demo (A) + demo (B ));
}
How to Use Singleton ios in development
In this instance, a macro group containing conditions is created to verify the password. If the password is correct, close the identity check window and open another form; if the password is incorrect, a message box is displayed asking you to enter the password again. Create a form and add a text box named "administrator password" to receive the password entered by the user. Recreate
In this instance, a macro
Macro _ cribd analysis, macro _ cribd
I have reviewed the C language in the process of learning "Windows program design" and experienced the power of macros._ Cribd
Cribd is short for the C run time implement, which refers to the implementation of the C Runtime Library.
As user code, you should not use this item.
The system prompts whether to use the dll dynamic C Runtime library or a
The C ++ compiler accepts# DefinePreprocessing Program commands.
#define identifier (...) replacement_list#define identifier (identifier_list, ...) replacement_list
If the listed macro parameters end with a ellipsis, more macro parameters except macro parameters can be called. Other parameters (including commas) are collected into a string, and the
5. A macro instance -- verify the password
In this instance, a macro group containing conditions is created to verify the password. If the password is correct, close the identity check window and open another form; if the password is incorrect, a message box is displayed asking you to enter the password again.
Create a form, add a text box, and name it "administrator password" to receive the password en
When there is too much code in your code, it is especially inconvenient to read the code, and you need to use a newline character "\". Be aware of two points when using line breaks:
The 1.c compiler is based on ";" To determine if it is a statement, so as long as it's not wrapped in parentheses, it's OK.
2. Do not put the space in the middle.
line wrap problem when string constants are definedIf we place a backslash at the end of a line of code, the C language compiler ignores line breaks at t
I feel like a macro. To put it bluntly, it is the flag of a global variable. The method it adds is as follows:
[emailprotected]7817:~/PROJECT/PROJECT_V5/32_kk_qhd_k25$ vim mediatek/config/common/ProjectConfig.mk.global
Projectconfig. mk. Global, as shown in the following figure.
####################################################################################################################################################################
A #else the //Compiling without ARC + #endif - //releasing an object $ #defineSafe_delete (P) if (p) {[P release], p = nil;} $ #defineSafe_release (x) [x Release];x=nil - //----------------------Memory-related---------------------------- - the //----------------------Pictures related to---------------------------- - //reading Local picturesWuyi #defineLoadImage (File,ext) [UIImage imagewithcontentsoffile:[[nsbundle mainbundle]pathforresource:file OfType:ext] the //Defining UIImage Objects - #
As shown below we open the EXCEL2007 worksheet and click the Circle in the upper-left corner as shown below
Then we click on "Excel Options" in the Open interface.
Okay, when we open it, we'll hit the "Trust Center" effect as shown below.
Click on the "Trust Center Settings" option to open the entry, the effect shown below
Click the "Macro Settings" option to open the entry details as shown below
Click "Enable
lock APIs are:spin_lock_init (x)This macro is used to initialize the spin lock x. Spin locks must be initialized before they are actually used. The macro is used for dynamic initialization.define_spinlock (x)The macro declares a spin lock x and initializes it. The macro is defined for the first time in 2.6.11 and does
One.#define是C语言中提供的宏定义命令, the main purpose is to provide programmers with certain convenience in programming, and to a certain extent, improve the efficiency of the program, but students often do not understand the nature of the command in learning, always create some confusion here, in the programming of the misuse of the command, To make the program run inconsistent with the intended purpose, or to read the program written by others, the results of the operation to understand the error, which
Inline functions are executed in much the same ways as with parametric macro definitions, but the parameters are handled differently. Macro definitions with parameters do not perform an operation on the parameters, but instead directly replace the
The inline function is the function first, which means that many properties of the function are applicable to the inline function, that is, the inline function fi
Many C + + books have advised us that C-language macros are the root of all evils, but things are not as bad as we think, like Goto. Macros have a big role in automatically generating code for us. If the template can produce various types of code for us (type substitution), then the macro can actually generate new code for us on the symbol (that is, symbol substitution, increment).
Some of the syntax questions about macros can be found on Google. Bel
In the C and C + + languages, an identifier is allowed to represent a string, called a macro, which can be a constant, an expression, a format string, and so on. When compiling preprocessing, all occurrences of the "macro name" in the program are substituted with the string in the macro definition, which is called "macro
(i) Symbolic constants
A macro definition is a substitution policy in C that uses a preprocessing command #define equate a string of (verbose) text with a name (called a macro), and then you can use the macro in bulk in the source code. In the preprocessing phase, replace the macros in the source code with the original text. For example, in the source code:
#def
1. How do I differentiate between macro names and macro strings in a macro definition? What should I pay attention to for macros with parameters?
In a macro definition, the macro name and macro string are distinguished by spaces.
1, preprocessing instructions
(1) Concept: C language in the source program before compiling, will first of some special preprocessing instructions to explain (such as #include
(2) Preprocessing instructions are all preceded by "#" and do not end with a semicolon.
(3) Preprocessing instructions can be placed anywhere in the file, his scope is from where it appears to the end of the file, we often put it in the source program head, so that its scope is the entire source program file.
(4) Preproce
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