alteryx macro

Label: Ar use SP data on code BS amp ef Container_of Macro Analysis// The macro is located in include/Linux/kernel. h. 1. Define the format /** * Container_of-cast a member of a structure out to the Containing Structure * * @ PTR: the pointer to the member. * @ Type: the type of the container struct this is embedded in. * @ Member: the name of the member within the struct. * */ # Defin

Value of Do{}while (0) When macro definition (#define) in C languageRecently found in the code of the new company everywhere used do{...} while (0), Google a bit, found that stack overflow early on a lot of discussion, summed up the discussion, coupled with their own understanding, do{...} while (0) the value is mainly reflected in:1. Increase the adaptability of the CodeThe following macro definition does

Recently began preparing for a lab study while documenting some of the programming trivia points encountered. Today when testing the SVD decomposition of matrices, we need to define the size of the rows and columns of the matrix, and I used to define these two variables with a macro definition, and when I run, I start thinking about what the difference between the macro definition and the constant is.Refer

Ladies and gentlemen, crossing, the last time we were talking about the example of a Boolean –bool type in C, this time we're talking about a built-in macro . Gossip Hugh, words return to the positive. Let's talk C chestnuts together!Crossing, we introduced the built-in macros in the C language in the 124th time, introducing the commonly used built-in macro _line_ and _file_. It also describes how to use t

Pre-compilation is the first step in the entire compilation process. It is the result output by the g ++-E option. This step processes Macros in the source file/header file. Macro commands are commonly used in the following categories: File Inclusion: # includeMacro definition: # define, # undefConditional compilation: # ifdef, # ifndef, # if, # elif, # else, # endif1. File Inclusion # includePre-processing will include all the content of the file to

Benefits of using do {} while (0) in macro definition #define MACRO_NAME(para) do{macro content}while(0)The following reasons are summarized: 1. the empty macro definition avoids warning: # define foo () do {} while (0) 2. An independent block exists, it can be used to define variables for complicated implementation. 3. If the

Cases: QA some vim command QThis macro only records the VIM command to register a, which can be executed with the command:@aYou can also add the number of executions:[Email protected]Performed 10 timesOnce you have performed a @a, you can use@@To repeat the execution of @aWhen you find that there is a register command macro is wrong, you can re-write the command

PS: haven't written blog for a long time, 1 is not to write, 2 is not what dry. Recently accumulated some things, can be taken out of the sun. Ha ha. First of all, boss let me simplify the code of case class copy to make it easy to read. Case Class A (a:string,b:int) Cases Class B (a:a,b:int,c:string) Val B = B (A ("a", 2), 3, "C") B.copy (A.copy (b=2))//above is a simple example,If the case class is multiple nested, it produces a similar//a.copy (B.copy (c.copy (D.copy ...). Extra-long code. At

Problem:Last year with pig a series of reports and ETL development, feel pig is very good, no hive of the delicate, and more than the rough mapreduce to the delicate, very called hand. The new year is just about the previous program adjustments, which are optimized for pig-written scripts. After all, the more you use it, the more you'll find the pig's charm.In finishing the previous pig program, found a problem, that is, pig does not extract the size of the data set function, so every time to ta

Recently in the Apue with the source code, see its error handling file used in the variable parameter list (below), just recently always see these functions in front of the eyes, so just make a break. Ha ha.#include "apue.h" #include 1. First, revisit the commonly used functions with variable parameters to format the output function family as an example:#include The function of these two sets of functions is the same, the difference is that the following uses a variable of type va_list, that is,

Selected Recently because of machine problems, began to use UltraEdit, used a few times, now carefully pondering a handful, only to find this editor true too good, powerful, really is the coding of the weapon, currently UE has been published to V11, has been supported by the default C # The coloring of the language (which is one of the important reasons why I choose UE). In the evening when debugging a C # applet, found that the UE has a code for debug is not the area, is the lack of code block

How to Use macro definition in C LanguageExplanation of macro replacement in C LanguageFirst, let's look at the following question:# Include # Define PRINT_CLINE () printf ("% d ",______) Int main (void) { PRINT_CLINE (); PRINT_CLINE (); Return 0; } Fill in the appropriate code at the horizontal line so that the output of the above Code is 34. I think most people do not have a c

Generally, there are not many built-in macro packages for software such as texlive installed in Linux, and many macro packages have been installed several years ago, in this way, it is often possible to compile the tex files on the Internet in the near future ~ Of course, you can put the macro package on the Internet directly to the tex file directory... generall

#, # @ And \ symbols in the macro definition of C LanguageSource: Liu shihui Rubby logs 1. # (stringizing) string Operators Purpose: Convert the input parameter name in the macro definition to a parameter name string enclosed by a pair of double quotation marks. It can only be used in macro definitions with input parameters, and must be placed before the paramet

Macro _ va_args _ of variable parameters in C Language __ 1 .# If you want to include macro parameters in a string, ansi c can do this. In the macro replacement section of the class function, # The symbol is used as a preprocessing operator to convert the language symbol into a string. For example, if X is a macro pa

1. Add a trace statement to MFC 2. In tools> MFC tracer, select enable tracing and click OK. 3. debug and run go (F5) (Note: not execute '! 'The reason why we couldn't see trace content in the past is that it wasn't debugging, '! ', Remember, remember) 4. The trace content will be displayed in the debug window in the output. The debug execution will automatically jump from the build window to the debug window, where the trace content will be displayed, ^_^ The following is a detailed description

工欲善其事, its prerequisite.Before you formally implement all the cool features and UI, getting ready is the only way to improve the efficiency of your next development.So, this series, I am not in a variety of heap technology, more attention is "Bing" before the "grain line", some cumbersome, but when the whole context is clear, the follow-up work is only on the good Foundation and framework of unlimited expansion and optimization.Macro definition is an effective tool for improving efficiency in th

If you are a C programmer, you must be familiar with macros, they are very powerful, if used correctly can make your work more effective. Then, if you're defining macros and you're not checking them out at random, then they can make you mad and waste n more time. In many C programs, you may see a number of more specific macro definitions that seem less straightforward. Here's an example:1 #define _set_taks_state (tsk, State_value) 2do {ts

MFC Technical Instructions: In MFCSDK switch method to process Windows messages, By message ing table(Message map) and virtual function polymorphism to process the specified form message 1. Declare a message ing table(Message map) Add a macro to the class that can process messages Declare_message_map () Note: MFC has a more detailed system overview. Here we only introduce several macro definitions.