1Data::Random(3)       User Contributed Perl Documentation      Data::Random(3)
2
3
4

NAME

6       Data::Random - Perl module to generate random data
7

SYNOPSIS

9         use Data::Random qw(:all);
10
11         my @random_words = rand_words( size => 10 );
12
13         my @random_chars = rand_chars( set => 'all', min => 5, max => 8 );
14         my $string       = rand_chars( set => 'all', min => 5, max => 8 );
15
16         my @random_set = rand_set( set => \@set, size => 5 );
17
18         my $random_enum = rand_enum( set => \@set );
19         my $random_enum = rand_enum( \@set ); # shortcut
20
21         my $random_date = rand_date();
22
23         my $random_time = rand_time();
24
25         my $random_datetime = rand_datetime();
26
27         open(my $file, ">", "rand_image.png") or die $!;
28         binmode($file);
29         print $file rand_image( bgcolor => [0, 0, 0] );
30         close($file);
31

DESCRIPTION

33       A module used to generate random data.  Useful mostly for test
34       programs.
35

METHODS

37   rand_words()
38       This returns a list of random words given a wordlist.  See below for
39       possible parameters.
40
41       ·   wordlist - the path to the wordlist file.  A lot of systems have
42           one at /usr/dict/words.  You can also optionally supply a
43           Data::Random::WordList object to keep a persistent wordlist.  The
44           default is the wordlist distributed with this module.
45
46       ·   min - the minimum number of words to return.  The default is 1.
47
48       ·   max - the maximum number of words to return.  The default is 1.
49
50       ·   size - the number of words to return.  The default is 1.  If you
51           supply a value for 'size', then 'min' and 'max' aren't paid
52           attention to.
53
54       ·   shuffle - whether or not the words should be randomly shuffled.
55           Set this to 0 if you don't want the words shuffled.  The default is
56           1.  Random::Data::WordList returns words in the order that they're
57           viewed in the word list file, so shuffling will make sure that the
58           results are a little more random.
59
60   rand_chars()
61       When called in a list context this returns a list of random characters
62       given a set of characters.  In a scalar context it returns a string of
63       random characters.  See below for possible parameters.
64
65       ·   set - the set of characters to be used.  This value can be either a
66           reference to an array of strings, or one of the following:
67
68               alpha        - alphabetic characters: a-z, A-Z
69               upperalpha   - upper case alphabetic characters: A-Z
70               loweralpha   - lower case alphabetic characters: a-z
71               numeric      - numeric characters: 0-9
72               alphanumeric - alphanumeric characters: a-z, A-Z, 0-9
73               char         - non-alphanumeric characters: # ~ ! @ $ % ^ & * ( ) _ + = - { } | : " < > ? / . ' ; ] [ \ `
74               misc         - same as 'char'
75               all          - all of the above
76
77       ·   min - the minimum number of characters to return.  The default is
78           0.
79
80       ·   max - the maximum number of characters to return.  The default is
81           the size of the set.
82
83       ·   size - the number of characters to return.  The default is 1.  If
84           you supply a value for 'size', then 'min' and 'max' aren't paid
85           attention to.
86
87       ·   shuffle - whether or not the characters should be randomly
88           shuffled.  Set this to 0 if you want the characters to stay in the
89           order received.  The default is 1.
90
91   rand_set()
92       This returns a random set of elements given an initial set.  See below
93       for possible parameters.
94
95       ·   set - the set of strings to be used.  This should be a reference to
96           an array of strings.
97
98       ·   min - the minimum number of strings to return.  The default is 0.
99
100       ·   max - the maximum number of strings to return.  The default is the
101           size of the set.
102
103       ·   size - the number of strings to return.  The default is 1.  If you
104           supply a value for 'size', then 'min' and 'max' aren't paid
105           attention to.
106
107       ·   shuffle - whether or not the strings should be randomly shuffled.
108           Set this to 0 if you want the strings to stay in the order
109           received.  The default is 1.
110
111   rand_enum()
112       This returns a random element given an initial set.  See below for
113       possible parameters.
114
115       ·   set - the set of strings to be used.  This should be a reference to
116           an array of strings. The "set" key will be assumed if the array
117           reference is passed as the only argument.
118
119   rand_date()
120       This returns a random date in the form "YYYY-MM-DD".  2-digit years are
121       not currently supported.  Efforts are made to make sure you're returned
122       a truly valid date--ie, you'll never be returned the date February
123       31st.  See the options below to find out how to control the date range.
124       Here are a few examples:
125
126           # returns a date somewhere in between the current date, and one year from the current date
127           $date = rand_date();
128
129           # returns a date somewhere in between September 21, 1978 and September 21, 1979
130           $date = rand_date( min => '1978-9-21' );
131
132           # returns a date somewhere in between September 21, 1978 and the current date
133           $date = rand_date( min => '1978-9-21', max => 'now' );
134
135           # returns a date somewhere in between the current date and September 21, 2008
136           $date = rand_date( min => 'now', max => '2008-9-21' );
137
138       See below for possible parameters.
139
140       ·   min - the minimum date to be returned. It should be in the form
141           "YYYY-MM-DD" or you can alternatively use the string "now" to
142           represent the current date.  The default is the current date;
143
144       ·   max - the maximum date to be returned. It should be in the form
145           "YYYY-MM-DD" or you can alternatively use the string "now" to
146           represent the current date.  The default is one year from the
147           minimum date;
148
149   rand_time()
150       This returns a random time in the form "HH:MM:SS".  24 hour times are
151       supported.  See the options below to find out how to control the time
152       range.  Here are a few examples:
153
154           # returns a random 24-hr time (between 00:00:00 and 23:59:59)
155           $time = rand_time();
156
157           # returns a time somewhere in between 04:00:00 and the end of the day
158           $time = rand_time( min => '4:0:0' );
159
160           # returns a time somewhere in between 8:00:00 and the current time (if it's after 8:00)
161           $time = rand_time( min => '12:00:00', max => 'now' );
162
163           # returns a date somewhere in between the current time and the end of the day
164           $time = rand_time( min => 'now' );
165
166       See below for possible parameters.
167
168       ·   min - the minimum time to be returned. It should be in the form
169           "HH:MM:SS" or you can alternatively use the string "now" to
170           represent the current time.  The default is 00:00:00;
171
172       ·   max - the maximum time to be returned. It should be in the form
173           "HH:MM:SS" or you can alternatively use the string "now" to
174           represent the current time.  The default is 23:59:59;
175
176   rand_datetime()
177       This returns a random date and time in the form "YYYY-MM-DD HH:MM:SS".
178       See the options below to find out how to control the date/time range.
179       Here are a few examples:
180
181           # returns a date somewhere in between the current date/time, and one year from the current date/time
182           $datetime = rand_datetime();
183
184           # returns a date somewhere in between 4:00 September 21, 1978 and 4:00 September 21, 1979
185           $datetime = rand_datetime( min => '1978-9-21 4:0:0' );
186
187           # returns a date somewhere in between 4:00 September 21, 1978 and the current date
188           $datetime = rand_datetime( min => '1978-9-21 4:0:0', max => 'now' );
189
190           # returns a date somewhere in between the current date/time and the end of the day September 21, 2008
191           $datetime = rand_datetime( min => 'now', max => '2008-9-21 23:59:59' );
192
193       See below for possible parameters.
194
195       ·   min - the minimum date/time to be returned. It should be in the
196           form "YYYY-MM-DD HH:MM:SS" or you can alternatively use the string
197           "now" to represent the current date/time.  The default is the
198           current date/time;
199
200       ·   max - the maximum date/time to be returned. It should be in the
201           form "YYYY-MM-DD HH:MM:SS" or you can alternatively use the string
202           "now" to represent the current date/time.  The default is one year
203           from the minimum date/time;
204
205   rand_image()
206       This returns a random image.  Currently only PNG images are supported.
207       See below for possible parameters.
208
209       ·   minwidth - the minimum width of the image.  The default is 1.
210
211       ·   maxwidth - the maximum width of the image.  The default is 100.
212
213       ·   width - the width of the image.  If you supply a value for 'width',
214           then 'minwidth' and 'maxwidth' aren't paid attention to.
215
216       ·   minheight - the minimum height of the image.  The default is 1.
217
218       ·   maxheight - the maximum height of the image.  The default is 100.
219
220       ·   height - the height of the image.  If you supply a value for
221           'width', then 'minwidth' and 'maxwidth' aren't paid attention to.
222
223       ·   minpixels - the minimum number of random pixels to display on the
224           image.  The default is 0.
225
226       ·   maxpixels - the maximum number of random pixels to display on the
227           image.  The default is width * height.
228
229       ·   pixels - the number of random pixels to display on the image.  If
230           you supply a value for 'pixels', then 'minpixels' and 'maxpixels'
231           aren't paid attention to.
232
233       ·   bgcolor - the background color of the image.  The value must be a
234           reference to an RGB array where each element is an integer between
235           0 and 255 (eg. [ 55, 120, 255 ]).
236
237       ·   fgcolor - the foreground color of the image.  The value must be a
238           reference to an RGB array where each element is an integer between
239           0 and 255 (eg. [ 55, 120, 255 ]).
240

VERSION

242       0.12
243

AUTHOR

245       Originally written by: Adekunle Olonoh
246
247       Currently maintained by: Buddy Burden (barefoot@cpan.org), starting
248       with version 0.06
249

CREDITS

251           Hiroki Chalfant
252           David Sarno
253               Michiel Beijen
254
256       Copyright (c) 2000-2011 Adekunle Olonoh.  Copyright (c) 2011-2015 Buddy
257       Burden.  All rights reserved.  This program is free software; you can
258       redistribute it and/or modify it under the same terms as Perl itself.
259

SEE ALSO

261       Data::Random::WordList
262
263
264
265perl v5.32.0                      2020-07-28                   Data::Random(3)
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