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ISA documentation [message #94753]

Wed, 27 September 2017 11:02

wlandsman
Messages: 743
Registered: June 2000

Senior Member

I recently had determine if an IDL variable was a hash, so my first thought was to use the ISA() function. But the ISA documentation does not mention its use to identify a hash -- or an ordered hash, or a dictionary, or a list

http://www.harrisgeospatial.com/docs/ISA.html

Of course, ISA() can be used to identify a hash variable

IDL> x = HASH('key1', 1, 'key2', 2)
IDL> PRINT, ISA(x, 'HASH')
1

Arguably, the ISA documentation can be defended because it does say that objects can be identified by their class name, and hashes, lists et al. are implemented as IDL objects

IDL> help,/obj,x
** Object class HASH, 1 direct superclass, 7 known methods

Still, I would think that the use of ISA() for hashes and lists et al. should be explicitly mentioned in the ISA() documentation. --Wayne

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[Message index]

		ISA documentation By: wlandsman on Wed, 27 September 2017 11:02
		Re: ISA documentation By: achim.holtmann on Thu, 28 September 2017 04:15

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