Tag：int
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Conversion between string and int types in golang
This paper summarizes the conversion methods between strings and various int types in golang: Convert string to int: int, err := strconv.Atoi(string) Convert string to Int64: int64, err := strconv.ParseInt(string, 10, 64) Int to string: string := strconv.Itoa(int) Int64 to string: string := strconv.FormatInt(int64,10) String to float32 / float64 float32, err = ParseFloat(string, 32) float64,err […]
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Pointer int * P = 0 in C language; And int * p* p=0; Detailed explanation of the relationship and difference between “and” & “
When beginners learn C language, the biggest headache may bePointer, don’t say much. Let’s get straight to the point Direct code int main(void) { int *p = 0; printf(“%d”, *p); system(“pause”); return 0; } Run directly. OK, does the program report an error? That’s right. Because int * P = 0 at this time is […]
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Solution to the problem of error reporting when bigint to int with sign in SQL Server
One requirement is to store multiple states (including all kinds of exception and warning states that can exist at the same time) in a cloud monitoring state value. Bit operation mechanism is used to store multiple states in an int. At present, the amount of monitoring log data is very large (100 million level), and […]
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Explain the difference between make (Chan int, 1) and make (Chan int) in go language
There is a problem with golang channel: it is found that the go coprocessor does not execute cooperatively as expected when reading channel data. After checking the data: Due to improper operation of channel, there are buffers and no buffers in channel. The following is the difference between them. No buffer channel Chan created with […]
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C ා the instance method of converting uint value to int
Uint in C is an unsigned integer type, and int is a qualified integer type. The value range of the two is different, so how to convert uint value to int? Open visual studio and create a console application. All the code in this paper is demonstrated in the main method of the program.cs file. […]
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How big are int types and uint types in golang?
Before we start, let’s look at the difference between uint and int Above is the figure, and below is the source code: package main import ( “fmt” _ “time” ) func main() { A: = byte (255) // 11111111 this is the limit of byte, because a: = byte (256) // out of range error […]
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Compare the performance of int, char and varchar in MySQL
There are many paradoxical “rumors” on the Internet, of course, are not malicious. Most of them are developers who are unwilling to take the initiative to study, but believe other people’s words. There are also many rumors about databases, such as “int performance is much higher than char“. I recently conducted a performance test for […]
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The Conversion of int and byte in go Language
Host byte order There are two host byte-order modes, big-end data mode and small-end data mode. In network programming, we should pay attention to the difference between them to ensure the correctness of data processing. For example, the data of network is interacted in large-end data mode, while most of our hosts are processed in […]