Filter returns a new slice containing all interface{}s in the slice that satisfy the predicate `f`.

Filter returns a new slice containing all interface{}s in the slice that satisfy the predicate `f`.

Include returns `true` if the target interface{} t is in the slice.

Index returns the first index of the target interface{} `t`, or -1 if no match is found.

Map returns a new slice containing the results of applying the function `f` to each interface{} in the original slice.