LastIndexOf

LastIndexOf

https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/String/lastIndexOf

The LastIndexOf() method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from fromIndex. Returns -1 if the value is not found.

Syntax: LastIndexOf(str, searchStr string, [, fromIndex int]) int

str := "canal"

fmt.Println(gstr.LastIndexOf(str, "a")) // => 3

fmt.Println(gstr.LastIndexOf(str, "a", 2)) // => 1

fmt.Println(gstr.LastIndexOf(str, "a", 0)) // => -1

fmt.Println(gstr.LastIndexOf(str, "x")) // => -1

fmt.Println(gstr.LastIndexOf(str, "c", -5)) // => 0

fmt.Println(gstr.LastIndexOf(str, "c", 0)) // => 0

fmt.Println(gstr.LastIndexOf(str, "")) // => 5

fmt.Println(gstr.LastIndexOf(str, "", 2)) // => 2

fmt.Println(gstr.LastIndexOf("Brave new world", "w")) // => 10

fmt.Println(gstr.LastIndexOf("Brave new world", "new")) // => 6