Question

How to extract only words with first-letter lowercase from a string in Go

Answer 1

package main

import (
    "fmt"
    "regexp"
)

// Function to extract words starting with lowercase
func GetLowercaseWords(s string) []string {
    re := regexp.MustCompile(`\b[a-z]\w*`)
    
    return re.FindAllString(s, -1)
}

func main() {
    s := "Go php Rust java C CPP python nodejs"

    matches := GetLowercaseWords(s)

    fmt.Println(matches)
}


/*
run:

[php java python nodejs]

*/

 

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Answer 2

package main

import (
    "fmt"
    "strings"
    "unicode"
)

// Function to extract words starting with lowercase
func GetLowercaseWords(s string) []string {
    words := strings.Fields(s)
    var result []string

    for _, w := range words {
        if len(w) > 0 && unicode.IsLower(rune(w[0])) {
            result = append(result, w)
        }
    }
    
    return result;
}

func main() {
    s := "Go php Rust java C CPP python nodejs"

    result := GetLowercaseWords(s)

    fmt.Println(result)
}


/*
run:

[php java python nodejs]

*/

 

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