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List->toArray() with structures in IDL 8.1 [message #76999]

Mon, 18 July 2011 16:05

b_gom
Messages: 105
Registered: April 2003

Senior Member

I get the following error when I try to use the toArray method on a
list which contains only one structure:

IDL> s={a:1,b:2}
IDL> l=list(s)
IDL> help,l->toarray()
% FIX: Struct expression not allowed in this context:
<PtrHeapVar4598>.
% Execution halted at: $MAIN$

If the list has more than one element, then things work normally:

IDL> l=list(s,s)
IDL> help,l->toarray()
<Expression> STRUCT = -> <Anonymous> Array[2]

I would expect the list with a single structure to behave just like
the list of scalars does:

IDL> x=23
IDL> l=list(x)
IDL> help,l->toarray()
<Expression> INT = Array[1, 1]

Am I missing something obvious?

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