Step by Step solution about How to resolve the algorithm String matching step by step in the Go programming language

This Go program demonstrates various string matching operations using the strings package:

1. Package Import:

   • The program imports the fmt package for input/output operations and the strings package for string manipulation.

2. match Function:

   • It takes two strings as arguments, first and second, and performs the following operations:

   • Prefix Check:

     • It checks if first starts with second using the strings.HasPrefix function and prints the result.

   • Containment Check:

     • It uses the strings.Index function to find the first occurrence of second within first.
     • If found, it prints that first contains second and indicates its location.
     • It then prints the location of all subsequent occurrences of second using a for loop.

   • Suffix Check:

     • It checks if first ends with second using the strings.HasSuffix function and prints the result.

3. main Function:

   • It calls the match function with the strings "abracadabra" and "abr" as arguments.

Expected Output:

1. abracadabra starts with abr: true
2. abracadabra contains abr: true,
2.1. at location 0,
2.2. at location 4,
2.2. and that's all
3. abracadabra ends with abr: false

package main

import (
    "fmt"
    "strings"
)

func match(first, second string) {
    fmt.Printf("1. %s starts with %s: %t\n",
        first, second, strings.HasPrefix(first, second))
    i := strings.Index(first, second)
    fmt.Printf("2. %s contains %s: %t,\n", first, second, i >= 0)
    if i >= 0 {
        fmt.Printf("2.1. at location %d,\n", i)
        for start := i+1;; {
            if i = strings.Index(first[start:], second); i < 0 {
                break
            }
            fmt.Printf("2.2. at location %d,\n", start+i)
            start += i+1
        }
        fmt.Println("2.2. and that's all")
    }
    fmt.Printf("3. %s ends with %s: %t\n",
        first, second, strings.HasSuffix(first, second))
}

func main() {
    match("abracadabra", "abr")
}