| Re: bug? or how to distinguish between a Hash and an array of Hashes ? [message #83395 is a reply to message #83394] |
Mon, 04 March 2013 06:39   |
markb77
Messages: 217
Registered: July 2006
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Senior Member |
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I've updated this a bit. It seems that the HELP command can
distinguish between the two cases, but SIZE(), even with the /
STRUCTURE keyword specified, cannot.
pro test
a = hash('first', 1, 'second', 2)
b = hash('third', 3, 'fourth', 4, 'fifth', 5)
print, 'Output of SIZE() for a HASH varible:'
print, size(a, /STRUCTURE)
c = [a,b]
print, 'Output of SIZE() for an array of HASHes:'
print, size(c, /STRUCTURE)
help, a, output=ahelp
help, c, output=chelp
print, ahelp
print, chelp
end
IDL> test
Output of SIZE() for a HASH varible:
{ OBJREF 11 0 0 2
1 2 0 0 0
0 0 0 0
}
Output of SIZE() for an array of HASHes:
{ OBJREF 11 0 0 2
1 2 0 0 0
0 0 0 0
}
A HASH <ID=18 NELEMENTS=2>
C OBJREF = Array[2]
so I could solve this by parsing the output of HELP, but this is
strongly discouraged in the documentation for the IDL Help command
itself, as the text formatting of the output from this command my
change...
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