Nov 12, 2019 in DevOps
Q: What Is Closure In Groovy?

1 Answer

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Nov 12, 2019
A closure in Groovy is an open, anonymous, block of code that can take arguments, return

a value and be assigned to a variable. A closure may reference variables declared in its

surrounding scope. In opposition to the formal definition of a closure, Closure in the

Groovy language can also contain free variables which are defined outside of its

surrounding scope.

A closure definition follows this syntax:

{ [closureParameters -> ] statements }

Where [closureParameters->] is an optional comma-delimited list of parameters, and

statements are 0 or more Groovy statements. The parameters look similar to a method

parameter list, and these parameters may be typed or untyped.

When a parameter list is specified, the -> character is required and serves to separate the

arguments from the closure body

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