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- 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 ==~ result type: Boolean boolean (there are no primitives in Groovy, all is not what it seems!) =~ result type: java util regex Matcher ~ result type: java util
- What is the ?: operator used for in Groovy? - Stack Overflow
The following code examples all produce the same results where x evaluates to true according to Groovy Truth These three code snippets mean the same thing If x is true according to groovy truth return x else return y x ?: y x ? x : y Standard ternary operator
- variables - What does [:] mean in groovy? - Stack Overflow
Technically, "is the only Map with size() returning 0" is untrue There are lots of possible map instances with size 0, and they definitely don't all have reference equality
- Groovy == operator - Stack Overflow
== in Groovy is roughly equivalent to equals(), however, you'll find it's different from Java when comparing different classes with the same value - if the class is Comparable Groovy also does type casting if possible If you check out the code, it looks like ultimately compareToWithEqualityCheck() is executed for ==
- Groovy executing shell commands - Stack Overflow
Groovy adds the execute method to String to make executing shells fairly easy; println "ls" execute() text
- Groovy: whats the purpose of def in def x = 0?
In unimportant scripts console input (like the groovy console) it's somewhat acceptable because the script's scope is limited I think the only reason groovy allows you to do this in scripts is to support DSLs the way Ruby does (A bad trade-off if you ask me, but some people love the DSLs)
- Groovy - How to compare the string? - Stack Overflow
equals() does not behave the same in Groovy as it does in Java Example here-- scroll down to 'GString and String' Basically both items have to be of the same type of String class Since the String class is implicit in the assignment -- GString is a Groovy language construct and String is an inline definition, something like def foo = "foo"
- Groovy: meaning of this inside a closure - Stack Overflow
"this" in a block mean in Groovy always (be it a normal Java-like block or a Closure) the surrounding class (instance) "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
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