Re: filtering an array

push @positions, [ $read->end + 1, $base ];
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i would like to remove every line of this array that contains a G or a T as the string

@positions = grep $_->[ 1 ] =~ /ac/i, @positions;
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i would like to get rid of the strings altogether, so i just have an array with one column representing the number

@positions = map $_->[ 0 ], @positions;
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Re^2: filtering an array by prbndr (Acolyte) on Sep 01, 2012 at 22:30 UTC
this code gives the warning: Use of uninitialized value in pattern match (m//). what exactly does this mean?	[reply]
Re^3: filtering an array by philiprbrenan (Monk) on Sep 01, 2012 at 22:41 UTC
You are using a variable in a pattern matching regular expression and said variable currently has no value. Please try assigning a value to the variable and see what happens. Thanks.	[reply]
Re^4: filtering an array by prbndr (Acolyte) on Sep 01, 2012 at 22:48 UTC
i see. so if my array @positions is already defined and created, do i need to loop over all the values in @positions and then execute the code you posted? something like: `for (@positions) {@positions = grep $_->[1] =~ /ac/i, @positions;}` and then: `for (@positions) {@positions = map $_->[0], @positions;}`	[reply] [d/l] [select]
Re^5: filtering an array by philiprbrenan (Monk) on Sep 01, 2012 at 23:03 UTC
Re^6: filtering an array by prbndr (Acolyte) on Sep 01, 2012 at 23:15 UTC
Some notes below your chosen depth have not been shown here
Re^5: filtering an array by philiprbrenan (Monk) on Sep 01, 2012 at 22:59 UTC
Re^6: filtering an array by prbndr (Acolyte) on Sep 01, 2012 at 23:03 UTC