Application and characteristics of string type in Go language

The string type is widely used in text processing and data representation in the Go language. The following are its characteristics: Immutable UTF-8 encoding can be obtained through the len() function. The length can be spliced ​​using operators or the strings.Join() function. Strings can be accessed through indexing or slicing. Substrings can be obtained using the strings.IndexByte(), strings.Contains(), strings.Index() and strings.Contains() functions. Substrings can be found using == and != comparisons. String content, or strings.EqualFold() case-insensitive comparison can use fmt.Printf(), strconv.FormatInt() and strconv.FormatFloat() functions to format strings

The application and characteristics of string type in Go language

The string type is an immutable byte sequence in Go language. It is widely used in text processing, data representation, and other scenarios involving character and string manipulation.

Features:

• Immutability: Cannot be modified after creation.
• UTF-8 encoding: By default, UTF-8 encoding is used to store characters.
• Length: Obtained through the len() function.

Create string:

var str1 string = "Hello"
str2 := "World"

String concatenation:

• Use Operator: go str3 := str1 " " str2
• Use strings.Join() Function: go str3 := strings.Join( []string{str1, str2}, " ")

Substring acquisition:

• Access through index: go char := str1[0]
• By slicing: go substring := str1[0:5]

characters String search:

• strings.IndexByte(): Find the position of the first matching byte.
• strings.Contains(): Check whether a string contains another string.
• strings.Index() and strings.Contains(): Find the position of a string substring.

String comparison:

• == and !=: compare string contents .
• strings.EqualFold(): Compare strings, case-insensitive.

String formatting:

• fmt.Printf(): Print a string using a formatted string.
• strconv.FormatInt() and strconv.FormatFloat(): Convert integers and floating point numbers to strings.

Practical case:

When writing a simple CLI program to parse command line parameters, the string type is widely used to handle user input.

package main

import (
    "fmt"
    "os"
    "strings"
)

func main() {
    // 获取第一个命令行参数
    argument := os.Args[1]

    // 检查参数是否包含空格
    if strings.Contains(argument, " ") {
        fmt.Println("参数包含空格")
    } else {
        fmt.Println("参数不包含空格")
    }
}

The above is the detailed content of Application and characteristics of string type in Go language. For more information, please follow other related articles on the PHP Chinese website!