Groovy grails how to determine a data type

Question

What is the best way to determine the data type in groovy    I d like to format the output differently if it s a date  etc

User · Answer

You can use the Membership Operator isCase   which is another groovy way   assert Date isCase new Date

User · Answer

To determine the class of an object simply call   someObject getClass     You can abbreviate this to someObject class in most cases  However  if you use this on a Map it will try to retrieve the value with key  class   Because of this  I always use getClass   even though it s a little longer   If you want to check if an object implements a particular interface or extends a particular class  e g  Date  use    somObject instanceof Date    or to check if the class of an object is exactly a particular class  not a subclass of it   use    somObject getClass      Date

User · Answer

somObject instanceof Date  should be   somObject instanceOf Date

User · Answer

Just to add another option to D  nal s answer  you can also still use the good old java lang Object getClass   method

User · Answer

Simple groovy way to check object type     somObject in Date   Can be applied also to interfaces

[groovy] Groovy / grails how to determine a data type?

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