I do not understand why it is necessary to distinguish between two different blocks. does "appropriate" mean that the block_ids must be the same? if yes, why not 
# A type A block
block_id=1
magic=true
unlikeliness=2
colour=green
warty=false
horns=1

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It would simplify the parsing. Otherwise (I assume you then compare the blocks pairwise), then your array of hashes approach seems to be the best choice. Maybe some of the myriad of Config::* modules on cpan could help.

In reply to Re: Parsing a file comprising blocks and comparing the blocks by lima1
in thread Parsing a file comprising blocks and comparing the blocks by loris

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