In our previous examples, we have made use of the it keyword. When a closure accepts only a single parameter, we are able to refer to this parameter as it and are free from having to explicitly define the parameter. The possible syntax definitions for a closure are:
The default case allows any parameters to be passed to the closure:
{ // statements }The closure does not accept any parameters:
{ -> // statements }The closure can accept one to many parameters with optional type annotations:
{ [type] param (,[type] param)* -> // statements }
The parameter list is a comma-separated list of parameter names with optional type definitions. Closures behave slightly different depending on whether we supply the optional type:
given: "Closures with various parameter definition"
def defaultParams = { println it; }
def dynamicParams = { something -> println something; }
def intParams = { int something -> println something; }
def stringParams = { String something...