isNullOrBlank static method
Checks if data is null or blank (empty or only contains whitespace). 检查数据是否为空或空(空或只包含空格)
Implementation
static bool isNullOrBlank(dynamic s) {
if (isNull(s)) return true;
switch (s.runtimeType) {
case String:
case List:
case Map:
case Set:
case Iterable:
return s.isEmpty;
break;
default:
return s.toString() == 'null' || s.toString().trim().isEmpty;
}
}