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Re: How to unflatten an array ?

• To: mathgroup at smc.vnet.net
• Subject: [mg112812] Re: How to unflatten an array ?
• From: Mark Adler <madler at alumni.caltech.edu>
• Date: Fri, 1 Oct 2010 05:42:45 -0400 (EDT)
• References: <i81j69$9v8$1@smc.vnet.net>

Don't know if it's the most efficient, but I would do this:

Partition[{{#1, #2}, #3} & @@@ a2, 3] === a1
True

Mark