CreateKVList create kvlist by constructor fn must be func() some_map.

CreateList create list by constructor function constructor must be func() slice_type.

Equal return a function(v interface{}) bool{ return v == elem }.

IsBlankStr str is blank.

IsNone nothing in option.

IsSome in option.

KVListOf map, prefer CreateKVList for compiler check.

ListOf load slice as List, prefer CreateList for compiler check.

SelfString return self.

common type asserter */.

common type asserter */.

common type asserter */.

common type asserter */.

common type asserter */.

common type asserter */.

common type asserter */.

common type asserter */.