Swift(2)Basic Opetators
==来测试两个对象指向相同的实例9、Tuple也能比较,thecomparisonisalreadydeterminedbythetuples’fisrtelements.如果第一个元素相同,继续看后面的元素10、Usetheternaryconditionaloperatorwithcare,however.itsconsicenesscanleadtohard-to-readcodeifoverused.Avoidcombningmultipleinstancesoftheternaryconditi