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Searching an element of string type in Golang slice

  • Last Updated : 05 Sep, 2019

In Go language slice is more powerful, flexible, convenient than an array, and is a lightweight data structure. The slice is a variable-length sequence which stores elements of a similar type, you are not allowed to store different type of elements in the same slice.
In the Go slice, you can search an element of string type in the given slice of strings with the help of SearchStrings() function. This function searches for the given element in a sorted slice of strings and returns the index of that element if present in the given slice. And if the given element is not available in the slice(it could be len(s_slice)), then it returns the index to insert the element in the slice. The specified slice must be sorted in ascending order. It is defined under the sort package so, you have to import sort package in your program for accessing SearchStrings function.

Syntax:

func SearchStrings(s_slice []string, s string64) int

Example 1:




// Go program to illustrate how to search an
// element of string type in the slice of strings
package main
  
import (
    "fmt"
    "sort"
)
  
// Main function
func main() {
  
    // Creating and initializing 
    // slice of strings
    // Using shorthand declaration
    slice_1 := []string{"C", "Go", "Java", "C#", "Ruby"}
    slice_2 := []string{"GEEKs", "123geeks", "gfg", "GeeksforGeeks"}
  
    var f1, f2, f3 string
    f1 = "GEEKs"
    f2 = "C"
    f3 = "gfg"
  
    // Sorting the given 
    // slice of strings
    sort.Strings(slice_1)
    sort.Strings(slice_2)
  
    // Displaying the slices
    fmt.Println("Slice 1: ", slice_1)
    fmt.Println("Slice 2: ", slice_2)
  
    // Searching a int type element 
    // in the given slice
    // Using SearchStrings function
    res1 := sort.SearchStrings(slice_1, f1)
    res2 := sort.SearchStrings(slice_2, f2)
    res3 := sort.SearchStrings(slice_2, f3)
  
    // Displaying the results
    fmt.Println("Result 1: ", res1)
    fmt.Println("Result 2: ", res2)
    fmt.Println("Result 3: ", res3)
  
}

Output:

Slice 1:  [C C# Go Java Ruby]
Slice 2:  [123geeks GEEKs GeeksforGeeks gfg]
Result 1:  2
Result 2:  1
Result 3:  3

Example 2:




// Go program to illustrate how to search an element
// of string type in the slice of strings
package main
  
import (
    "fmt"
    "sort"
)
  
// Main function
func main() {
  
    // Creating and searching an element
    // in the given slice of strings
    // Using SearchStrings function
    res1 := sort.SearchStrings([]string{"apple", "banana",
                                "kiwi", "orange"}, "kiwi")
      
    res2 := sort.SearchStrings([]string{"Cat", "Cow",
                             "Dog", "Parrot"}, "Cat")
  
    // Displaying the results
    fmt.Println("Result 1: ", res1)
    fmt.Println("Result 2: ", res2)
  
}

Output:

Result 1:  2
Result 2:  0



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