Advanced Features (The GNU Awk User’s Guide)
Part III:Moving Beyond Standard awk with gawk
12 Advanced Features of gawk
Write documentation as if whoever reads it is a violent psychopath who knows where you live.
— Steve English, as quoted by Peter Langston
This chapter discusses advanced features in
gawk. It’s a bit of a “grab bag” of items that are otherwise unrelated to each other. First, we look at a command-line option that allows
gawk to recognize nondecimal numbers in input data, not just in
awk programs. Then,
gawk’s special features for sorting arrays are presented. Next, two-way I/O, discussed briefly in earlier parts of this Web page, is described in full detail, along with the basics of TCP/IP networking. Finally, we see how
gawk can profile an
awk program, making it possible to tune it for performance.
Additional advanced features are discussed in separate chapters of their own:
- Internationalization with
gawk, discusses how to internationalize your
awkprograms, so that they can speak multiple national languages.
gawk’s built-in command-line debugger for debugging
- Arithmetic and Arbitrary-Precision Arithmetic with
gawk, describes how you can use
gawkto perform arbitrary-precision arithmetic.
- Writing Extensions for
gawk, discusses the ability to dynamically add new built-in functions to
|• Nondecimal Data||Allowing nondecimal input data.|
|• Array Sorting||Facilities for controlling array traversal and sorting arrays.|
|• Two-way I/O||Two-way communications with another process.|
|• TCP/IP Networking||Using |
|• Profiling||Profiling your |
|• Advanced Features Summary||Summary of advanced features.|