FindLastIndex

func FindLastIndex[T any](slice []T, predicate func(value T, index int, slice []T) bool) int

FindLastIndex takes a slice of type T and executes the passed in predicate function for each element in the slice starting from its end. If the predicate returns true, the element's index is returned. If no element is found, -1 is returned. The function is passed the current element, the current index and the slice itself as function arguments.

package main

import (
    "fmt"
    "strings"

    "github.com/Goldziher/go-utils/sliceutils"
)

func main() {
    friends := []string{"John", "Bob", "Mendy", "Suzy", "John"}

    result := sliceutils.FindLastIndex(friends, func(value string, index int, slice []string) bool {
        return value == "John"
    })

    fmt.Print(result) // 4
}