Groovy Operators Operators Expressions Precedence And

The subject of groovy operatorsoperatorsexpressionsprecedence and encompasses a wide range of important elements. What is the "?:" operator used for in Groovy? downvoted because it's confusing. OP is about groovy and if people scan-read quickly the answers, we might think it's a valid groovy syntax proposed. What is the difference between ==~ and != in Groovy?. In Groovy you also have to be aware that in addition to ==~, alias "Match operator", there is also =~, alias "Find Operator" and ~, alias "Pattern operator".

All are explained here. From another angle, what is the groovy << operator mean in this context?. In groovy, the bitwise operators can be overridden with the leftShift (<<) and rightShift (>>) methods defined on the class. Furthermore, it's idiomatic groovy to use the leftShift method for append actions on strings, buffers, streams, arrays, etc and thats what you're seeing here. Use literal operators (eg "and", "or") in Groovy expressions?.

My current work project allows user-provided expressions to be evaluated in specific contexts, as a way for them to extend and influence the workflow. These expressions the usual logical ones f. This perspective suggests that, grails - Using "$" in Groovy - Stack Overflow. In a GString (groovy string), any valid Groovy expression can be enclosed in the $ {...} including method calls etc.

This is detailed in the following page. Moreover, groovy - Splitting String with delimiter - Stack Overflow. I use it all the time.

EDIT: Just looking at it they are slightly different--split returns an array while tokenize returns an ArrayList. Virtually the same thing in Groovy, the split has the advantage that it ports easily to Java, I don't think tokenize is a java method on String (unless it's a fairly new one and I missed it) Groovy different results on using equals () and == on a GStringImpl. Similarly, according to the Groovy docs, the == is just a "clever" equals() as it also takes care of avoiding NullPointerException: Java’s == is actually Groovy’s is() method, and Groovy’s == is a clever equals()!

[...] But to do the usual equals() comparison, you should prefer Groovy’s ==, as it also takes care of avoiding NullPointerException, independently of whether the left or right is null ... What is the Groovy 'it'? I have a collection which I process with removeIf {} in Groovy. Moreover, inside the block, I have access to some it identifier. What is this and where is it documented?

Groovy: meaning of 'this' inside a closure - Stack Overflow. 14 " this " in a block mean in Groovy always (be it a normal Java-like block or a Closure) the surrounding class (instance). Equally important, " owner " is a property of the Closure and points to the embedding object, which is either a class (instance), and then then same as " this ", or another Closure.

I would forget about the scope thing totally for this part.