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I recently came across this magical operator when digging into Groovy: <=>
Groovy has really made me happy with elvis operators ?. and ?: which I use constantly now and very much wish were in Java. With this new operator, I have only found this reference. It seems to make comparators much easier. My question is how does it handle null values and how does it compare non Comparable object. Does this operator have a name, I couldn't find it Googling.
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An Operator is a symbol which operates on a value or data. It represents a specific action on working with data. The data on which operators operates is called operand. It can be used with one or more than one values to produce a single value.
What is Operator? Simple answer can be given using expression 4 + 5 is equal to 9. Here 4 and 5 are called operands and + is called operator.
Arithmetic Operators are used to perform mathematical calculations. Assignment Operators are used to assign a value to a property or variable. Assignment Operators can be numeric, date, system, time, or text. Comparison Operators are used to perform comparisons.
Relational Operators == (Equal to)– This operator is used to check if both operands are equal. != (Not equal to)– Can check if both operands are not equal. >
You got a list of operators here. It is called the "Spaceship" operator. It handles null without problem.
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It's called the spaceship operator and is also commonly used for comparison in Ruby.
http://www.objectpartners.com/2010/02/08/the-groovy-spaceship-operator-explained/
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