A brief analysis of how to use the split function in golang

Golang is a programming language that is increasingly popular among modern programming languages. As its name suggests, Golang is specifically designed for writing web applications in high-concurrency environments. Among them, string splitting is a relatively common operation in Golang. When splitting a string, we have different splitting functions to choose from for different delimiters. However, when we want to remove certain parts of the resulting string after splitting, we need to use specific techniques.

In this article, we will learn how to use the split function in Golang to remove some parts of the string obtained after splitting. We will also introduce some useful Golang code snippets and techniques to Help you make better use of the split function to achieve the desired effect.

First, let us look at the basic syntax of the split function in Golang:

func Split(s, sep string) []string

Among them, s represents the source string, and sep represents the string to be split. The return value of this function is a string slice type. When using this function to split strings, we can use multiple delimiters in sep, so that string splitting can be performed in multiple splitting methods.

The split function in Golang provides a very convenient string splitting operation, but what should we do when we want to delete some parts of the string obtained after splitting? This requires some special skills, and we'll cover the two main ones below.

The first technique is to use the append function. When we iterate through the split string slices, we can use the append function to splice together the strings we need to keep. The following is a sample code using the append function:

package main

import (
    "fmt"
    "strings"
)

func main() {
    s := "one two;three,four:five"
    sep := " ;,:"
    words := strings.Split(s, sep)

    var keep []string
    for _, w := range words {
        switch w {
        case "one":
            continue
        case "four":
            continue
        default:
            keep = append(keep, w)
        }
    }

    fmt.Println(strings.Join(keep, " "))

}

In this sample code, we first use the split function to split the source string s and get the string slice words. In the next loop, we You can judge whether you need to retain the current string according to your own needs. In the example, we have deleted all the strings one and four. Finally, we use the Join function to concatenate the remaining strings and output them.

The second technique is to use the strings.ReplaceAll function. Although we can use the append function to remove the strings we don't need, sometimes we can also use string replacement to achieve the same effect. The following is a sample code using the ReplaceAll function:

package main

import (
    "fmt"
    "strings"
)

func main() {
    s := "one two;three,four:five"
    sep := " ;,:"
    for _, c := range sep {
        s = strings.ReplaceAll(s, string(c), " ")
    }

    s = strings.ReplaceAll(s, "one", "")
    s = strings.ReplaceAll(s, "four", "")
    fmt.Println(s)
}

In this sample code, we first use the ReplaceAll function to replace the delimiter with a space character, and then use the ReplaceAll function to replace the string we do not need with one and Four are replaced with empty strings. Finally, we output the remaining string.

Summary:

When we need to delete certain parts of the string split by the split function in Golang, we can use the append function and the strings.ReplaceAll function. When using these functions, please pay attention to keeping the code clear and easy to understand, which can improve the readability and maintainability of the code.

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