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map reduce program to count number of lines for particular field.

Question asked by anjali on Dec 9, 2014
I have a .dat file which has n number of lines with multiple fields in one line.
Each field is separated by '|'. Now i would like to write a map reduce program to count number of lines for particular field(same like in hive using count(column_name)).
i am very new to map reduce programming. Any help would be appreciated.

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