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Re: lambda function syntax [message #92275 is a reply to message #92249]

Mon, 09 November 2015 09:30

chris_torrence@NOSPAM is currently offline

chris_torrence@NOSPAM
Messages: 528
Registered: March 2007

Senior Member

On Thursday, November 5, 2015 at 7:36:12 AM UTC-7, greg...@googlemail.com wrote:
> I've created a lambda procedure inside an object (to hold a user-defined function):
>
> self.lambda=lambdap("t,n1:"+code)
>
> where, e.g. code="n1=sqrt(t)"
>
> This appears to work fine, but I can't figure out a legal syntax to call it inside a method:
>
>
> function test_obj::N1,t
> self.n1_lambda,t,n1
> return,n1
> end
>
>
> IDL> print,obj->n1(1)
> % Attempt to call undefined method: 'TEST_OBJ::N1_LAMBDA'.
>
> ---
>
> Having written the example, I discovered it does work if I do this:
>
> function test_obj::N1,t
> lam=self.n1_lambda
> lam,t,n1
> return,n1
> end
>
> which isn't so bad. The first should be correct syntax, though, I think.
>
> cheers,
> Greg

Hi Greg,

Yeah, I don't think this is going to work. The parser is interpreting that at compile time as a method call, rather than waiting until runtime. I thought that setting "compile_opt strictarr" might help, but it didn't.

I think your workaround is the best solution. Sorry about that.

-Chris

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		lambda function syntax By: greg.addr on Thu, 05 November 2015 06:36
		Re: lambda function syntax By: chris_torrence@NOSPAM on Mon, 09 November 2015 09:30

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