Empty

Testing for an Empty String

An Empty String is a String that is meats at least ONE of the following criteria

• is null

• is zero length

isEmpty

 String isEmpty(String? string)

The isEmpty returns true if ANY ONE of the above criteria holds true

String.isEmpty(null);
-> true
String.isEmpty('');
-> true
String.isEmpty('\t\n\r ');
-> false
String.isEmpty('a');
-> false

isNotEmpty

 String isNotEmpty(String? string)

The isNotBlank returns true only if ALL of the above criteria are invalid

String.isNotEmpty(null);
-> false
String.isNotEmpty('');
-> false
String.isNotEmpty('\t\n\r ');
-> true
String.isNotEmpty('a');
-> true