Test for Null or Boolean Map Attribute

OrPlus.groovy

def foo = null
def bar = [active: false]
def foobar = [active: true]

println "Long hand version"
println "--------"
println "Foo: ${! foo || ! foo.active}"
println "Bar: ${! bar || ! bar.active}"
println "Foobar: ${! foobar || ! foobar.active}"

println "\nShort hand version"
println "--------"
println "Foo: ${! foo?.active}"
println "Bar: ${! bar?.active}"
println "Foobar: ${! foobar?.active}"