I am tryin to change the sort fields in mainframes to the equivalent in Unix. I have a large datafile of which i extract only the specified fields ... cut them ... write it into another file with a delimiter... and sort based on these fields... then match these fields to those from input file ... problem is while matching i use sequential search which is very expensive... Is there any alternate search? binary search wudnt work bcos it needs a sorted file... any ideas???
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