Codecademy
codecademy.com › docs › go › strings › lastindex()
Go | Strings | LastIndex() | Codecademy
September 26, 2023 - Returns the index value of the last occurrence of a substring in the original string.
Go Packages
pkg.go.dev › strings
strings package - strings - Go Packages
LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s. ... package main import ( "fmt" "strings" ) func main() { fmt.Println(strings.LastIndexByte("Hello, world", 'l')) fmt.Println(strings.LastIndexByte("Hello, world", 'o')) fmt.Println(strings.Last...
GeeksforGeeks
geeksforgeeks.org › go language › strings-lastindex-function-in-golang-with-examples
strings.LastIndex() Function in Golang With Examples - GeeksforGeeks
April 19, 2020 - strings.LastIndex() function in the Golang returns the starting index of the occurrence of the last instance of a substring in a given string. If the substring is not found then it returns -1. Thus, this function returns an integer value.
TutorialsPoint
tutorialspoint.com › how-to-find-the-last-index-value-of-a-string-in-golang
How to find the last index value of a string in Golang?
package main import ( "fmt" "strings" ) func main() { // Initializing the Strings p := "Programming Language" q := "String Function" r := "Golang String Function" s := "1234512345" // Display the Strings fmt.Println("String 1:", p) fmt.Println("String 2:", q) fmt.Println("String 3:", r) fmt.Println("String 4:", s) // Using the LastIndex Function test1 := strings.LastIndex(p, "ge") test2 := strings.LastIndex(q, "C") test3 := strings.LastIndex(r, "ng") test4 := strings.LastIndex(s, "23") // Display the LastIndex Output fmt.Println("LastIndex of 'ge' in String 1:", test1) fmt.Println("LastIndex of 'C' in String 2:", test2) fmt.Println("LastIndex of 'ng' in String 3:", test3) fmt.Println("LastIndex of '23' in String 4:", test4) }
IncludeHelp
includehelp.com › golang › strings-lastindex-function-with-examples.aspx
Golang strings.LastIndex() Function with Examples
August 17, 2021 - // Golang program to demonstrate the // example of strings.LastIndex() Function package main import ( "fmt" "strings" ) func main() { var str string var substr string var index int str = "Hello, world!" substr = "world" index = strings.LastIndex(str, substr) if index >= 0 { fmt.Printf("Last index of %q in %q is %d.\n", substr, str, index) } else { fmt.Printf("%q does not found in %q.\n", substr, str) } str = "Hello, world!" substr = "l" index = strings.LastIndex(str, substr) if index >= 0 { fmt.Printf("Last index of %q in %q is %d.\n", substr, str, index) } else { fmt.Printf("%q does not found in %q.\n", substr, str) } str = "Hello!
Educative
educative.io › answers › what-is-the-lastindex-function-in-golang
What is the LastIndex function in Golang?
The LastIndex function is used to find the index of the last instance of a substring in a string value.
GeeksforGeeks
geeksforgeeks.org › go language › how-to-find-the-last-index-value-of-specified-string-in-golang
How to find the last index value of specified string in Golang? - GeeksforGeeks
July 12, 2025 - These functions are defined under ... these functions: 1. LastIndex: This function is used to find the index value of the last instance of the given string from the original string....
Codekru
codekru.com › home › strings.lastindex() method in golang
strings.LastIndex() method in Golang - Codekru
September 25, 2022 - This means that if there are multiple occurrences of the string substr in the string s, then it is going to return the last occurrence of the string substr · What does it return? LastIndex() method returns an int value representing the last occurrence of the string substr within the string s.
Thedeveloperblog
thedeveloperblog.com › default_002
Golang Index, LastIndex: strings Funcs
Golang program that uses LastIndex package main import ( "fmt" "strings" ) func main() { input := "one two one" // Get last index, searching from right to left.
Dot Net Perls
dotnetperls.com › index-go
Go - strings.Index, LastIndex Funcs - Dot Net Perls
package main import ( "fmt" "strings" ) func main() { input := "one two one" // Get last index, searching from right to left. i := strings.LastIndex(input, "one") fmt.Println(i) }
TutorialKart
tutorialkart.com › golang-tutorial › golang-find-index-of-last-occurrence-of-substring-in-string
How to find index of Last Occurrence of Substring in a String in Go?
May 28, 2021 - LastIndex function returns an integer that represents the position of last occurrence of substr in str. In the following program, we will take a string Welcome to Go Tutorial, Go Examples and find the index of last occurrence of substring Go.
Top answer 1 of 4
64
strings.LastIndex makes this quite neat:
s := "Hello,Stack,Overflow"
last := s[strings.LastIndex(s, ",")+1:]
fmt.Println(last)
returns "Overflow". If the search string isn't found it returns the whole string, which is logical.
Playground here
2 of 4
32
You should assign the results of the split to a variable, instead of calling it twice.
ss := strings.Split(msg, ".")
s := ss[len(ss)-1]
(Notice that this allows (or maybe forces) you to deal with the case where ss is empty or something else unexpected explicitly, before indexing it.)
If you're doing this over and over again, and it offends you having to use two lines (or two lines plus error handling) instead of one, you can abstract it into a function easily:
func lastString(ss []string) string {
return ss[len(ss)-1]
}
s1 := lastString(strings.Split("example.txt", "."))
s2 := lastString(strings.Split("example.jpg", "."))
After all, passing the result of a function as an argument has essentially the same effect as binding it to a variable.
GeeksforGeeks
geeksforgeeks.org › go language › strings-lastindexbyte-function-in-golang-with-examples
strings.LastIndexByte() Function in Golang With Examples - GeeksforGeeks
April 28, 2025 - fmt.Println(strings.LastIndexByte("geeksforgeeks", 'g')) // returns the last index of 'k' in string. fmt.Println(strings.LastIndexByte("geekgeekgeek", 'k')) } Output: ... // Golang program to illustrate the // strings.LastIndexByte() Function package main // importing fmt and strings import ( "fmt" "strings" ) // calling main method func main() { // performs case-insensitive search(returns -1).
Top answer 1 of 3
16
To split any string only at the last occurrence, using strings.LastIndex
import (
"fmt"
"strings"
)
func main() {
x := "a_ab_daqe_sd_ew"
lastInd := strings.LastIndex(x, "_")
fmt.Println(x[:lastInd]) // o/p: a_ab_daqe_sd
fmt.Println(x[lastInd+1:]) // o/p: ew
}
Note, strings.LastIndex returns -1 if substring passed(in above example, "_") is not found
2 of 3
4
Since this is for path operations, and it looks like you don't want the trailing path separator, then path.Dir does what you're looking for:
fmt.Println(path.Dir("a/b/c/d/e"))
// a/b/c/d
If this is specifically for filesystem paths, you will want to use the filepath package instead, to properly handle multiple path separators.
Go
go.dev › pkg › strings
Package strings - The Go Programming Language
Join concatenates the elements of its first argument to create a single string. The separator string sep is placed between elements in the resulting string. ... LastIndex returns the index of the last instance of substr in s, or -1 if substr is not present in s.
Go Forum
forum.golangbridge.org › getting help
Is there a strings.LastIndex that counts runes instead of bytes? - Getting Help - Go Forum
February 19, 2016 - Learning Go. Is there a strings.LastIndex that counts runes instead of bytes? s1 := "test- 1" // using hyphen fmt.Println(strings.LastIndex(s1, " ")) // outputs 5 s2 := "test— 2" // using long dash instead of hyphen …
Golangdoc
golangdoc.github.io › pkg › 1.8.5 › strings › index.html
strings - The Go Programming Language
Join concatenates the elements of a to create a single string. The separator string sep is placed between elements in the resulting string. ... LastIndex returns the index of the last instance of sep in s, or -1 if sep is not present in s.
GitHub
github.com › golang › go › blob › master › src › strings › strings.go
go/src/strings/strings.go at master · golang/go
func LastIndex(s, substr string) int { n := len(substr) switch { case n == 0: return len(s) case n == 1: return bytealg.LastIndexByteString(s, substr[0]) case n == len(s): if substr == s { return 0 · } return -1 · case n > len(s): return -1 ·
Author golang
myCompiler
mycompiler.io › view › IFzuYJS3c1I
strings.LastIndex in Go (Go) - myCompiler
March 25, 2024 - package main import ( "fmt" "strings" ) func main() { str := "hello, world!" idx := strings.LastIndex(str, ",") fmt.Println(strings.TrimSpace(str[idx+1:])) }
Published Mar 25, 2024
Go Packages
pkg.go.dev › rsc.io › xstd › go1.9.3 › strings
strings package - rsc.io/xstd/go1.9.3/strings - Go Packages
September 29, 2022 - LastIndexAny returns the index of the last instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s. ... package main import ( "fmt" "rsc.io/xstd/go1.9.3/strings" ) func main() { fmt.Println(strings.LastIndexAny("go gopher", "go")) ...