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Tag: function

Is MySQL have “analysis function” in Oracle?

I am looking for analysis functions like PARTITION BY in MySQL (see docs for more information)

Does it exist ?

Update 04/2018

MySQL 8.0 now supports window functions.

I am l

October 4, 2021By Simo Mysql analysis, function, mysql, Oracle, Whether it isLeave a Comment

C # datetime.now function detailed

Summary: Detailed explanation of the DateTime.Now function of C#

??? //April 24, 2008
??? System.DateTime.Now.ToString( “D”);
??? //2008-4-24
??? System.DateTime.Now.ToString(“d”);
??? //

October 4, 2021By Simo C# C #, DateTime, datetime.now, detailed explanation, functionLeave a Comment

How to pack printf () into a function or macro?

This sounds a bit like an interview question, but it is actually an actual question.

I am using an embedded platform and only provide this​​ The equivalent of these functions:

> printf(

October 4, 2021By Simo C & C++ function, How to, macro, Packaging, printfLeave a Comment

Symfony – How do I handle custom SQL functions in architecture updates?

Sometimes, when you are looking for performance, you need to use some complexity functions and triggers to delegate some responsibilities to the database. I want to know that when you call the doct

October 3, 2021By Simo System Architecture architecture, Customizing, function, How, Medium, Processing, SQL, Symfony, UpdateLeave a Comment

How to drop the button in the subgroup function?

Solution:
1. Find the sub-collection field

2, open the field details and configure in the auxiliary configuration

Join the JEPaaS technical exchange group to learn more< br>**

October 3, 2021By Simo Cloud Service buttons, function, How to remove, Medium, subsequentLeave a Comment

Inheritance: Constructor, initialization C, similar to array members of the foundation class in C 11

Consider the following code:

struct Base //in my real scenario Base class can not be changed
{
int a;
double b[10];
};
struct Child: Base
{
Child(int aa, double bb[10]): Base{aa} {} //Thi

October 3, 2021By Simo Software Design array, base, China, class, constructing, function, inheritance, Initialization, Member, Similar toLeave a Comment

Haskell inheritance, data, constructor

So I want to define multiple data classes for my Asteroids game/job:

data One = One {oneVelocity :: Velocity, onePosition :: Position, (((other properties unique to One))))
data Two = Two {tw

October 3, 2021By Simo Software Design construct, data, function, Haskell, inheritanceLeave a Comment

Performance – What is the fastest way to apply functions on each line of matrix?

I have searched so far and I know there are several methods (1, 2, 3, 4) I have used the following code so far:

Fv_calc(:,2) = arrayfun(@(n) MaxPositiveRoot2DegreePolynomial(QuadraticCoeffici

October 2, 2021By Simo Performance application, each, fastest, function, line, Matrix, method, performance, whatLeave a Comment

Add a HeartBeat function on RK3288 LED

Platform: Rockchip’s rk3288

Author: fulinux

*****This article allows reprinting, but please indicate the source: http:/ /blog.csdn.net/fulinus****

diff –git a/arch/arm/boot/dts/r

October 2, 2021By Simo Monitoring Add, function, Heartbeat, LED, RK, RK3288Leave a Comment

How to retrieve the original order of keyword parameters passed to function call?

The order of retrieving keyword arguments passed through **kwargs is very useful in the specific project I am working on. It is about making a nd numpy array with meaningful dimensions (now Called

October 2, 2021By Simo Search Engines call, function, how to retrieve, keyword, order, original, parameter, passLeave a Comment

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