Get the index of the string needle in array haystack
func StringArrayIndex(haystack []string, needle string) int
Does the hastack contain the string needle
func StringArrayContains(haystack []string, needle string) bool
Perform a function on each item in the slice, return the result
func StringArrayMap(haystack []string, f func(string) string) []string
Return a slice which contains only items from haystack that passes the test func
func StringArrayFilter(haystack []string, f func(string) bool) []string
Return a count of items in haystack that passes the test func
func StringArrayCount(haystack []string, f func(string) bool) int
Does any item in the haystack pass the test func
func StringArrayAny(haystack []string, f func(string) bool) bool
Do all the items in the haystack pass the test func
func StringArrayAll(haystack []string, f func(string) bool) bool