GAWK: Effective AWK Programming

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334 GAWK: Effective AWK Programmingwith the Invariant Sections being list their titles, withthe Front-Cover Texts being list, and with the Back-Cover Textsbeing list.If you have Invariant Sections without Cover Texts, or some other combination of thethree, merge those two alternatives to suit the situation.If your document contains nontrivial examples of program code, we recommend releasingthese examples in parallel under your choice of free software license, such as the GNUGeneral Public License, to permit their use in free software.
Index 335Index!! (exclamation point), ! operator . . . . . . 92, 95, 223! (exclamation point), != operator . . . . . . . . . 89, 95! (exclamation point), !~ operator . . 24, 32, 34, 76,89, 90, 95, 97! operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98, 223"" (double quote) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12, 15" (double quote), regexp constants . . . . . . . . . . . . . 34## (number sign), #! (executable scripts). . . . . . . . 13# (number sign), #! (executable scripts),portability issues with . . . . . . . . . . . . . . . . . . . . . 13# (number sign), commenting . . . . . . . . . . . . . . . . . . 14$$ (dollar sign) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27$ (dollar sign), $ field operator . . . . . . . . . . . . . 39, 94$ (dollar sign), incrementing fields and arrays . . 86$ field operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39%% (percent sign), % operator . . . . . . . . . . . . . . . . . . . . 95% (percent sign), %= operator . . . . . . . . . . . . . . . 85, 95&& (ampersand), && operator . . . . . . . . . . . . . . . . 91, 95& (ampersand), gsub/gensub/sub functions and. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140’’ (single quote) . . . . . . . . . . . . . . . . . . . . . . . . 11, 13, 15’ (single quote), vs. apostrophe . . . . . . . . . . . . . . . . 14’ (single quote), with double quotes. . . . . . . . . . . . 15(() (parentheses) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28() (parentheses), pgawk program. . . . . . . . . . . . . . 175** (asterisk), * operator, as multiplication operator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95* (asterisk), * operator, as regexp operator . . . . . 28* (asterisk), * operator, null strings, matching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143* (asterisk), ** operator . . . . . . . . . . . . . . . 82, 94, 180* (asterisk), **= operator. . . . . . . . . . . . . . 85, 95, 180* (asterisk), *= operator. . . . . . . . . . . . . . . . . . . . 85, 95++ (plus sign) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28+ (plus sign), + operator . . . . . . . . . . . . . . . . . . . . . . . 95+ (plus sign), ++ operator . . . . . . . . . . . . . . . . . . 86, 94+ (plus sign), += operator . . . . . . . . . . . . . . . . . . 84, 95+ (plus sign), decrement/increment operators. . . 86,, (comma), in range patterns . . . . . . . . . . . . . . . . . . 98-- (hyphen), - operator . . . . . . . . . . . . . . . . . . . . . . . . . 95- (hyphen), -- (decrement/increment) operator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94- (hyphen), -- operator. . . . . . . . . . . . . . . . . . . . . . . . 86- (hyphen), -= operator . . . . . . . . . . . . . . . . . . . . 85, 95- (hyphen), filenames beginning with . . . . . . . . . 178- (hyphen), in character lists. . . . . . . . . . . . . . . . . . . 29--assign option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178--compat option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178--copyleft option . . . . . . . . . . . . . . . . . . . . . . . . . . . 179--copyright option . . . . . . . . . . . . . . . . . . . . . . . . . . 179--disable-directories-fatal configurationoption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269--disable-lint configuration option . . . . . . . . . 269--disable-nls configuration option . . . . . . . . . . 269--dump-variables option . . . . . . . . . . . . . . . . 179, 187--enable-portals configuration option . . 173, 269--enable-switch configuration option . . . . . . . . 269--exec option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179--field-separator option . . . . . . . . . . . . . . . . . . . 177--file option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177--gen-po option . . . . . . . . . . . . . . . . . . . . . . . . . 164, 179--help option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179--lint option . . . . . . . . . . . . . . . . . . . . . . . . . . . 177, 180--lint-old option . . . . . . . . . . . . . . . . . . . . . . . . . . . 180--non-decimal-data option . . . . . . . . . . . . . 169, 180--non-decimal-data option, strtonum functionand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169--optimize option . . . . . . . . . . . . . . . . . . . . . . . . . . . 178--posix option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180--posix option, --traditional option and . . . 181--profile option . . . . . . . . . . . . . . . . . . . . . . . . 173, 181--re-interval option . . . . . . . . . . . . . . . . . . . . . . . . 181--source option . . . . . . . . . . . . . . . . . . . . . . . . . 181, 182--traditional option . . . . . . . . . . . . . . . . . . . . . . . . 178
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