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HASH -- bug, or "feature"? [message #75878] Wed, 20 April 2011 12:12
Gray is currently offline  Gray
Messages: 253
Registered: February 2010
Senior Member
Can anyone tell me why, when you create a hash, the elements are not
in the order of the keys you give? And, even worse, when you index a
hash with an array of keys, the resulting hash does not come out in
the same order as the array?

IDL> h = hash(['a','b','c','d'],indgen(4))
IDL> print, h
c: 2
a: 0
b: 1
d: 3
IDL> print, h[['a','c','d']]
c: 2
a: 0
d: 3

This is making my bookkeeping using hashes basically impossible.

--Gray

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