Re: Larry Gets The Colon. (selective addition of an arrayref to a hash) (code)

It is not necessary to associate data with filenames, just data with line numbers. So, we construct a hash with line numbers as keys.

I'm sure there's a reason, but it's not apparent to me... why use a hash with numbers as keys instead of an array of array references?

If God had meant us to fly, he would *never* have given us the railroads.
--Michael Flanders

Comment on Re: Larry Gets The Colon. (selective addition of an arrayref to a hash) (code)

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Re: Re: Larry Gets The Colon. (selective addition of an arrayref to a hash) (code) by bwana147 (Pilgrim) on Jun 01, 2001 at 20:21 UTC
I guess it's because not every line is interesting. Suppose you want to find the line numbers where a token is found in a collection of files, but don't care about comments, why would you want to keep array elements which are uninteresting? You'd need to filter them out later anyway, with something like "`grep { @$_ } @list`". Using "`keys %list`" is altogether easier.	[reply] [d/l] [select]
Re: Re: Larry Gets The Colon. (selective addition of an arrayref to a hash) (code) by Anonymous Monk on Oct 14, 2003 at 09:29 UTC
Without the railroads, how would we ge to the airport ;-)	[reply]