Grasshopper

algorithmic modeling for Rhino

Operator ≤ not defined for string and double

Hi everybody!

I'm trying to work with the function if into one variable expression box.

The problem happens when I connect one string (one panel with multiple values grafted) to the "a" input: the expression editor gives me "Operator ≤ not defined for string and double" as you can see at the image bellow.

It seems to be a problem with just that kind of operator, because the addition and subtraction works fine, but just doesn't fit my approach.

Any ideas?

Thanks guys!

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Permalink Reply by Hannes Löschke on February 16, 2012 at 1:24pm

GH has some internal logic to convert strings like "1.2" to numbers. This doesn't happen in the function component. 

Feed your string through a number param before feeding it to the function and GH schould do the conversion for you.

Permalink Reply by Leandro Michelena on February 22, 2012 at 9:48am

Thanks, Hannes!

That's exactly what I was missing.

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