gawk: Programs Summary
11.4 Summary
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* The programs provided in this major node continue on the theme that
reading programs is an excellent way to learn Good Programming.
* Using '#!' to make 'awk' programs directly runnable makes them
easier to use. Otherwise, invoke the program using 'awk -f ...'.
* Reimplementing standard POSIX programs in 'awk' is a pleasant
exercise; 'awk''s expressive power lets you write such programs in
relatively few lines of code, yet they are functionally complete
and usable.
* One of standard 'awk''s weaknesses is working with individual
characters. The ability to use 'split()' with the empty string as
the separator can considerably simplify such tasks.
* The examples here demonstrate the usefulness of the library
functions from Library Functions for a number of real (if
small) programs.
* Besides reinventing POSIX wheels, other programs solved a selection
of interesting problems, such as finding duplicate words in text,
printing mailing labels, and finding anagrams.