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Dead work Create tables 1 use [test1] 2 go 3 4 create table [dbo].[student]( 5 [id] [int] identity(1,1) not null, 6 [name] [nvarchar](50) null, 7 [project] [nvarchar](50) null, 8 [score] [int] null, 9 constraint [pk_student] primary key clustered 10 ( 11 [id] asc 12 )with (pad_index = off, statisti ...

User-related API s User registration: Used for App user registration URL address: / reg Request mode: POST Request agreement: JSON: { "username":username, "password":password, "nickname":nickname, "gender":gender, "avatar":avatar.jpg } Response data: JSON: { "code":0, "msg":"login was successful", "data":{} } Use ...

Typical application scenarios are: N servers provide caching services, need to load balance the server, distribute requests to each server on average, and each machine is responsible for 1/N of the service. The commonly used algorithm is to take the remainder of hash result (hash() mod N): for machine numbers from 0 to N-1, according to the cu ...

With (rand): 　　Topic: Questions: For the data mod = 2 of $10%$, a [i] must be 1 and output 1 directly. For another $10%$data n=1, output $a [1] ^ m% mod $attention mod instead of $1e9+7$. For the data of $50%$, we consider dp. Set $f[i][j]$as the number of schemes whose result is j after the first operation. The easy-to-get transfer eq ...

Vert.x Web Services have two protocols, one is HTTP and the other is HTTP using ssl. There are five ways of requesting, get, post, put, delete, head.For simplicity, the server mainly implements request processing for get and post of HTTP protocol.as follows 1 @Override 2 public void start() throws Exception { 3 4 HttpServer serv ...

0x11 stack Stack is a LIFO linear data structure AcWing 41.Stack containing min function Maintain two stacks, one to record the value of the stack and the other to record the current minimum value.cpp class MinStack { public: stack< int > a , b; MinStack() { } void push(int x) { a.push( x ); if( b.empty() | ...

Object-Oriented and Process-Oriented 1. What is process-oriented The core is the word process: process-oriented is a kind of pipeline workflow, which is what to do first and what to do first. 2. What is Object-Oriented The core is the word "object": a programming idea, God's thinking, everything is an object, responsible for sched ...

IO file output Question 1: How does Python implement print without line change? By default, Python's print() function is newline, such as print("Hello Dacheng") print("!!!") # Output Hello Dacheng !!! Look at the source code of the print() function. By default, end=" n" (newline), n means newline character. ...

I. if conditional statement Basic Grammar 1: if C1: pass1 else: pass2 When condition C1 is satisfied, the pass1 part is executed. When the condition does not satisfy C1, execute the pass2 part Basic grammar 2: if C1: pass1 # elif It's a branch statement. It's unlimited in number. It can have more than one stateme ...

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