Filter applies the provided filter function and removes all items from the slice for which the filter function returns true.

Has returns true if the needle is in the haystack (case-sensitive).

HasI returns true if the needle is in the haystack (case-insensitive).

TrimEmptyFilter applies the strings.TrimFunc function and removes all empty strings.

TrimSpaceEmptyFilter applies the strings.TrimSpace function and removes all empty strings.