Find element in array or slice

---

examples/find-element-in-slice/find_element_in_slice.go

package main

import (
    "fmt"
)

func main() {
    celestialObjects := []string{"Moon", "Gas", "Asteroid", "Dwarf", "Asteroid", "Moon", "Asteroid"}
    fmt.Println(celestialObjects)
    var location int
    var found bool
    var str string

    str = "Asteroid"
    location, found = findElement(str, celestialObjects)
    if found {
        fmt.Printf("Found %v in %v\n", str, location)
    } else {
        fmt.Printf("Not found %v in %v\n", str, location)
    }

    str = "Star"
    location, found = findElement(str, celestialObjects)
    if found {
        fmt.Printf("Found %v in %v\n", str, location)
    } else {
        fmt.Printf("Not found %v in %v\n", str, location)
    }

}

func findElement(elem string, elements []string) (int, bool) {
    for i, value := range elements {
        if value == elem {
            return i, true
        }
    }
    return -1, false
}

[Moon Gas Asteroid Dwarf Asteroid Moon Asteroid]
Found Asteroid in 2
Not found Star in -1