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Full Discussion: Remove leading zeroes in 2nd field using sed
Top Forums Shell Programming and Scripting Remove leading zeroes in 2nd field using sed Post 302459443 by DGPickett on Monday 4th of October 2010 04:41:45 PM
Old 10-04-2010
Your solution is very simple and ingenuous, and you get the terse and simple award.

My alternative was annotated that, for big data sets 0* may be slower because it always hits and a hit seems to have extra cost to copy or move parts of the buffer. Some regex have metachar + just to facilitate situations like 00*. If you add a second zero so it only triggers occasionally, then you have to anchor to ^, which is also a cost. The costs definitely vary with data, and probably vary with different sed versions and systems.

Your solution is not as extensibly general, as a tutorial, being only good for the second field.

It is good to be aware of the alternatives and tradeoffs.

It is wise to benchmark when the run time rises.
 

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