In hindsight, the complication of the inner anonymous array is needless. It reflects how my mind reckoned the data structure at the moment I wrote the transform.

The three-argument split is just a habit. The habit is based on the documentation, which states: "In time critical applications it behooves you not to split into more fields than you really need." I don't know if the OPs application is time-critical or not. I went with the more conservative assumption. Like I said: habit.

I like the regular expression pattern matching version better anyway.

In reply to Re^3: numeric sort on substring by Jim
in thread numeric sort on substring by Anonymous Monk

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