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Articles tagged with #dart-language
Typedef Keyword : In Dart, the typedef is used to generate an alias for function type that we can use it as type annotation for declaring variables and return types of that function type. An alias of function type can be used as type annotation in v...
Assert Statement : During development, use an assert statement— assert(<condition>, <optionalMessage>); —to disrupt normal execution if a boolean condition is false. // Make sure the variable has a non-null value. assert(text != null); // Ma...
Throw Keyword : The throw keyword is used to explicitly raise an exception. A raised exception should be handled to prevent the program from exiting abruptly. Syntax : throw new Exception_name() Example : main() { try { test_age...
Finally clause : To ensure that some code runs whether or not an exception is thrown, use a finally clause. If no catch clause matches the exception, the exception is propagated after the finally clause runs: try { breedMoreLlamas(); } fina...
Error handling : Exceptions : Your Dart code can throw and catch exceptions. Exceptions are errors indicating that something unexpected happened. If the exception isn't caught, the isolate that raised the exception is suspended, and typically the i...
Debugging : Every now and then, developers commit mistakes while coding. A mistake in a program is referred to as a bug. The process of finding and fixing bugs is called debugging and is a normal part of the development process. This section cove...
