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Diffstat (limited to 'doc/gawk.texi')
| -rw-r--r-- | doc/gawk.texi | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/doc/gawk.texi b/doc/gawk.texi index e56ee61e..6fed73a5 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -64,9 +64,9 @@ @c applies to and all the info about who's publishing this edition @c These apply across the board. -@set UPDATE-MONTH September, 2018 -@set VERSION 4.2 -@set PATCHLEVEL 1 +@set UPDATE-MONTH January, 2019 +@set VERSION 5.0 +@set PATCHLEVEL 0 @set GAWKINETTITLE TCP/IP Internetworking with @command{gawk} @ifset FOR_PRINT @@ -76,7 +76,7 @@ @set TITLE GAWK: Effective AWK Programming @end ifclear @set SUBTITLE A User's Guide for GNU Awk -@set EDITION 4.2 +@set EDITION 5.0 @iftex @set DOCUMENT book @@ -284,13 +284,13 @@ Fax: +1-617-542-2652 Email: <email>gnu@@gnu.org</email> URL: <ulink url="https://www.gnu.org">https://www.gnu.org/</ulink></literallayout> -<literallayout class="normal">Copyright © 1989, 1991, 1992, 1993, 1996–2005, 2007, 2009–2018 +<literallayout class="normal">Copyright © 1989, 1991, 1992, 1993, 1996–2005, 2007, 2009–2019 Free Software Foundation, Inc. All Rights Reserved.</literallayout> @end docbook @ifnotdocbook -Copyright @copyright{} 1989, 1991, 1992, 1993, 1996--2005, 2007, 2009--2018 @* +Copyright @copyright{} 1989, 1991, 1992, 1993, 1996--2005, 2007, 2009--2019 @* Free Software Foundation, Inc. @end ifnotdocbook @sp 2 @@ -17929,18 +17929,23 @@ otherwise, return @code{NaN} (``not a number'') on IEEE 754 systems. Additionally, @command{gawk} prints a warning message when @code{x} is negative. +@cindex Beebe, Nelson H.F.@: @item @code{rand()} @cindexawkfunc{rand} @cindex random numbers, @code{rand()}/@code{srand()} functions Return a random number. The values of @code{rand()} are uniformly distributed between zero and one. -The value could be zero but is never one.@footnote{The C version of @code{rand()} -on many Unix systems -is known to produce fairly poor sequences of random numbers. -However, nothing requires that an @command{awk} implementation use the C -@code{rand()} to implement the @command{awk} version of @code{rand()}. -In fact, @command{gawk} uses the BSD @code{random()} function, which is -considerably better than @code{rand()}, to produce random numbers.} +The value could be zero but is never one.@footnote{The C version of +@code{rand()} on many Unix systems is known to produce fairly poor +sequences of random numbers. However, nothing requires that an +@command{awk} implementation use the C @code{rand()} to implement the +@command{awk} version of @code{rand()}. In fact, for many years, +@command{gawk} used the BSD @code{random()} function, which is +considerably better than @code{rand()}, to produce random numbers. +From @value{PVERSION} 4.1.4, courtesy of Nelson H.F.@: Beebe, @command{gawk} +uses the Bayes-Durham shuffle buffer algorithm which considerably extends +the period the random number generator, and eliminates short-range and +long-range correlations that might exist in the original generator.} Often random integers are needed instead. Following is a user-defined function that can be used to obtain a random nonnegative integer less than @var{n}: |