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 of bytes, you can find the first index value of any specified instance in the given slice using IndexAny() function. This function returns the byte index of the first occurrence in the original slice of any of the Unicode code points in chars. If the Unicode code point from chars is not available or empty in the original slice, then this method will return -1. It is defined under the bytes package so, you have to import bytes package in your program for accessing IndexAny function.
func IndexAny(ori_slice byte, val string) int
Here, ori_slice is the original string and val is a string, whose we want to find the first index value. Let us discuss this concept with the help of the given examples:
Final Value: Slice 1: 15 Slice 2: 10 Slice 3: -1
Original Slice: Slice 1: !!GeeksforGeeks## Slice 2: Apple Slice 3: %geeks% Last Index: Slice 1: 3 Slice 2: 3 Slice 3: -1