Dear Monks,

I have to process many kinds of text files in order to filter out contents. For each kind of file there is a list of susbstitution patterns to be applied on each line.

I would like to store all possible patterns in an array. Then I would call a subroutine on each line with the list of patterns to apply.

Example of pseudo-code: 
@all_patterns = (s/#.*//, s/^\s+//, s/\s+$//, s/^Total//, s/^,// );
# and so on

while(<FILE1>) {
 apply_patterns($_, (0,2,3)); # apply patterns 0, 2 and 3
}

while(<FILE2>) {
 apply_patterns($_, (2,5,7)); # apply patterns 2, 5 and 7
}

while(<FILE3>) {
 apply_patterns($_, (5,4,3)); # apply patterns 5, 4 and 3
}

[download]

How is it possible to write the 'apply_patterns' subroutine ?

Thanks for your help.

In reply to Filtering files with lists of substitution patterns by LinuxMatt

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