Dear monks, I have two arrays that I have to compare. E.g.: 
Array1
ATOM   2198  [b]SG  CYS L  51[/b]      39.781 -12.827   5.691  1.00 26
+.67 
ATOM   2199  N   MET L  52      37.845 -15.766   5.722  1.00 33.08 
ATOM   2200  CA  MET L  52      38.312 -17.144   5.674  1.00 33.08 
ATOM   2201  C   MET L  52      37.329 -18.022   4.901  1.00 33.08

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Array2
ATOM   2212 [b] CB  MET L  52[/b]      17.332  94.112  87.029  1.00  0
+.00 
ATOM   2213  CG  MET L  52      18.017  94.866  88.170  1.00  0.00 
ATOM   2214  SD  MET L  52      18.711  96.457  87.699  1.00  0.00 
ATOM   2215  CE  MET L  52      17.198  97.429  87.820  1.00  0.00 
ATOM   2216  N   ARG L  53      19.331  91.671  87.132  1.00  0.00

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I am supposed to remove elements from array2 that are not present in array1. But my problem is I have to judge the differences based only on the bold text above. i.e., the perl program should compare both the arrays and if the bold part is common in both files, then it should be removed from array2. I am not understanding how I can tell perl to look only for the bold text and ignore the remaining text and number. Can anyone help me? Cheers

In reply to Accessing secondary elements in array by chavanak

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