7.15. Review

7.15.1. String Functions

% cat datafile
					northwest          NW   Joel Craig          3.0    .98    3    4
					western            WE   Sharon Kelly        5.3    .97    5    23
					southwest          SW   Chris Foster        2.7    .8     2    18
					southern           SO   May Chin            5.1    .95    4    15
					southeast          SE   Derek Johnson       4.0    .7     4    17
					eastern            EA   Susan Beal          4.4    .84    5    20
					northeast          NE   TJ Nichols          5.1    .94    3    13
					north              NO   Val Shultz          4.5    .89    5    9
					central            CT   Sheri Watson        5.7    .94    5    13
Example 7.89. 
% nawk 'NR==1{gsub(/northwest/,"southeast", $1) ;print}' datafile
southeast     NW     Joel Craig         3.0  .98  3   4

EXPLANATION

If this is the first record (NR == 1), globally substitute the regular expression northwest with southeast, if northwest is found in the first field.

Example 7.90. 
% nawk 'NR==1{print substr($3, 1, 3)}' datafile
						Joe

EXPLANATION

If this ...

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