Menu
What does @ means before a field name in Groovy? For some classes I am able to access private fields that are not directly accessible, let's take ComposedClosure for example:
public class Person { private String name } def u = new Person(name:"Ron") println u.@name //Ron println u.name //Ron a = {2} >> {3} println a.@first //first closure object println a.first //runtime error 
656
Yes, the "?:" operator will return the value to the left, if it is not null. Else, return the value to the right. "Yes, the "?:" operator will return the value to the left, if it is not null." - That is incorrect.
No semicolons semicolons are optional in Groovy, you can omit them, and it's more idiomatic to remove them.
Groovy Programming Fundamentals for Java Developers For variable definitions it is mandatory to either provide a type name explicitly or to use "def" in replacement.
It allows you to override groovy's use of property accessors. If you write:
println u.name groovy will invoke the automatically generated getter Person.getName(). If you write:
println u.@name it will go directly to the field like it would in Java. In the case of the closure, it seems to have a first field but not a corresponding getFirst accessor.
In the groovy manual, it's documented as the direct field access operator.
66
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
