https://community.jmp.com/t5/Discussions/How-to-tell-if-an-optional-argument-that-could-be-an-Associative/m-p/640566#M83792 <P>err I was one search away... I just saw that Is Associative Array exists</P> Thu, 08 Jun 2023 21:35:19 GMT mat-ski 2023-06-08T21:35:19Z https://community.jmp.com/t5/Discussions/How-to-tell-if-an-optional-argument-that-could-be-an-Associative/m-p/640565#M83791 <P>As noted in the title, if I have a function that takes some argument that could be an Associative Array:</P> <P>&nbsp;</P> <PRE><CODE class=" language-jsl">someFunc = Function( {arg1}, [...] )</CODE></PRE> <P>&nbsp;</P> <P>And the argument is optional, how to I check `Is Missing`? When I try to use Is Missing in cases where the value does turn out to be an Associative Array I get the error "argument should be numeric in access or evaluation of 'Is Missing' , Is Missing/*###*/(aa)"</P> Fri, 09 Jun 2023 23:55:59 GMT https://community.jmp.com/t5/Discussions/How-to-tell-if-an-optional-argument-that-could-be-an-Associative/m-p/640565#M83791 mat-ski 2023-06-09T23:55:59Z https://community.jmp.com/t5/Discussions/How-to-tell-if-an-optional-argument-that-could-be-an-Associative/m-p/640566#M83792 <P>err I was one search away... I just saw that Is Associative Array exists</P> Thu, 08 Jun 2023 21:35:19 GMT https://community.jmp.com/t5/Discussions/How-to-tell-if-an-optional-argument-that-could-be-an-Associative/m-p/640566#M83792 mat-ski 2023-06-08T21:35:19Z