Go language regular expression skills: how to match consecutive numbers

Go language regular expression skills: How to match consecutive numbers

In the process of processing text, it is often necessary to use regular expressions for text matching and search and replacement operations. For some specific needs, such as matching consecutive numbers, we can use some techniques to achieve it.

In the Go language, by using the regular expression package regexp, we can easily achieve this requirement. Two common ways of matching consecutive numbers will be introduced below, and sample codes will be given.

Method 1: The same numbers that appear continuously

For situations where we need to match the same numbers that appear continuously, we can use backreferences to achieve this. Backreferences can refer to content that has been matched previously. Specifically, they can be matched by using the form (d) . Among them, represents the content captured in the first bracket before the reference, and represents repeated one or more times.

The sample code is as follows:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    text := "111222333444555"
    re := regexp.MustCompile(`(d)
+`)
    matches := re.FindAllString(text, -1)
    for _, match := range matches {
        fmt.Println(match)
    }
}

The running result is:

111
222
333
444
555

Method 2: Any number that appears continuously

If you want to match any number that appears continuously , we can use the expression d to achieve this. Among them, d means matching any numeric character, and means repeating one or more times.

The sample code is as follows:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    text := "123456789"
    re := regexp.MustCompile(`d+`)
    matches := re.FindAllString(text, -1)
    for _, match := range matches {
        fmt.Println(match)
    }
}

The running result is:

123456789

Through the above two methods, we can easily achieve the need to match consecutive numbers. Of course, in practical applications, we can also adjust the regular expression pattern according to specific situations to meet more complex matching needs.

I hope this article will help you understand how to match consecutive numbers in Go language!

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