How to Split Strings Based on Regular Expressions in Go?

Splitting Strings Using Regular Expressions in Go

In Go, splitting a string based on a regular expression can be achieved with the regexp.Split function. This is particularly useful when the delimiter is dynamic or requires a more complex pattern matching.

How to Use regexp.Split

The syntax of regexp.Split is:

func Split(s string, re *Regexp, n int) []string

• s is the string to be split.
• re is a pointer to a compiled regular expression.
• n is the maximum number of substrings to return. Use -1 for no limit.

Example: Splitting String Based on Numbers

Consider the example of splitting a string at the occurrence of numbers:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    re := regexp.MustCompile("[0-9]+")
    txt := "Have9834a908123great10891819081day!"

    split := re.Split(txt, -1)
    set := []string{}

    for i := range split {
        set = append(set, split[i])
    }

    fmt.Println(set) // ["Have", "a", "great", "day!"]
}

Explanation:

• The regular expression "[0-9] " matches sequences of numbers.
• The Split function takes the input string txt and splits it into substrings based on the specified regular expression.
• The resulting substrings are stored in the split array.
• Since the n parameter is set to -1, there is no limit on the number of substrings.
• We iterate over the split array and append each substring to the set array.
• The output is ["Have", "a", "great", "day!"].

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