What's new in Groovy 1.8.6: Array.contains()

beware.groovy

// Given a List of BigDecimals
List      bewareList = [ 1.1, 2.0, 3.1 ]
// And a matching array of double
double[] bewareArray = bewareList as double[]

def ival = 2    // This will be a java.lang.Integer
def dval = 2.0  // And this, a java.math.BigDecimal

// Both of these pass
assert bewareArray.contains( dval )
assert  bewareList.contains( dval )

// This passes
assert bewareArray.contains( ival )
// But this fails, as the Integer object 2 isn't contained
assert  bewareList.contains( ival )

contains.groovy

// Uses the pure Java method
assert list.contains( 2 )

// Uses a method added by Groovy 1.8.6
assert array.contains( 2 )

historical_method.groovy

if( !( element in array ) ) {
  // do something
}

similarity.groovy

List   list = [ 1, 2, 3 ]
int[] array = [ 1, 2, 3 ]

assert  list.class.name == 'java.util.ArrayList'
assert array.class.name == '[I'

assert  list.collect { it * 2 } == [ 2, 4, 6 ]
assert array.collect { it * 2 } == [ 2, 4, 6 ]