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This week, we're updating our course layouts and descriptions. Presentation and materials always gently change over time, but just occasionally there's a need to make a step change to clear out some of the old and roll in the new. That's now happening - but over a long and complex site it's not instant and you'll see sections of the site changing up to and including 19th September.

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Reformatting question

Posted by enquirer (enquirer), 3 November 2002
I want to parse some large files and put them into a format that will go into a database. Not every line has complete information. Some of the information is missing. I need to throw away the descriptions and leave behind the good info ....

The file has lines that look like this: country=US:state=TX:city=Dallas:areacode=214:lat=42.5044:long=-71.1964:timezone=CST:etc...

I want

Posted by admin (Graham Ellis), 3 November 2002
How about splitting each line at : and = into a hash:
       %line = ($wholeline =~ /([^:]+)=([^:]+)/g);
then re-joining a list slice
       $newline = join(":",@line{country,state,city,lat});

Tried it out on your data - worked for me. Note the assignment of a regular expression match straight into a hash (it's very useful that the key and value come in that order in the match), and the use of a hash slice.

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