$length++ if $_->[2] for @select;

Unfortunately, Perl doesn't understand this "double modifier" syntax (syntax error at..., near "] for "), so it would have to be: 

do { $length++ if $_->[2] } for @select;

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In reply to Re^2: Length of multidimensional array based on the particular index value by Eliya
in thread Length of multidimensional array based on the particular index value by k_manimuthu

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