Check out 'man perlfaq4', and the question titled, "How do I shuffle
an array randomly?". It gives a nice algorithm for shuffling, which
could be applied similar to below to output shuffled lines.
-Rob
> On 20010928.0900, Anthony J. Breeds-Taurima said ...
>
> On Thu, 27 Sep 2001, Joey Hess wrot
I want to thank you all for your help. Many of the solutions sounded great.
(Makes me wish I knew a bit about some of the other programming languages
available, but I'm strictly a beginner, so I'm sticking with bash at the
moment). But it's good to know that there's such a knowledgable group out
On Thu, 27 Sep 2001, Joey Hess wrote:
> Anthony J. Breeds-Taurima wrote:
> > <== randomize ==>
> > #!/usr/bin/perl
> > ## print a file in random order
> > while(<>) {
> > $_{$_}=0
> > }
> > foreach (keys%_) {
> > print
> > }
>
> keys is hardly random. It always outputs the keys in the same
Anthony J. Breeds-Taurima wrote:
> <== randomize ==>
> #!/usr/bin/perl
> ## print a file in random order
> while(<>) {
> $_{$_}=0
> }
> foreach (keys%_) {
> print
> }
keys is hardly random. It always outputs the keys in the same order for
a given set of keys.
--
see shy jo
Dave gets my vote for the best answer.
I'm a bit biased in that I like a "meat grinder" approach with sed, awk,
cat, and a lot of pipesigns, but you've got to admit, his little
oneliner script is much tidier than the "here's how it's done in my
favorite language" answers.
Dave Thayer wrote:
>
On Thu, Sep 27, 2001 at 10:55:50AM -0400, Noah Meyerhans wrote:
| On Thu, Sep 27, 2001 at 09:20:04AM -0400, dman wrote:
| > | /dev/random gives random bits. I don't know where it is documented.
| > | There is a system call random() (see man 3 random). You could write a
| > | wrapper C program to
Hi,
Jeremy Whetzel <[EMAIL PROTECTED]> writes:
> I'm in the process of writing up a script that I need to be able to
> "randomly" switch around the lines in a text file. (ala a random mp3
> playlist) Would anyone have any suggestions? I was originally thinking
> of using a random number generat
* Anthony J. Breeds-Taurima ([EMAIL PROTECTED]) [010926 23:14]:
> <== randline ==>
> #!/usr/bin/perl
> ## print 1 randomline from a file
> @_=<>;
> print $_[rand$#_];
while this one works, the one Martin posted is a better solution.
They're both O(n) in terms of time, but Martin's is O(1) wrt spac
On Thu, Sep 27, 2001 at 09:20:04AM -0400, dman wrote:
> | /dev/random gives random bits. I don't know where it is documented.
> | There is a system call random() (see man 3 random). You could write a
> | wrapper C program to use it in scripts.
>
> Naw, just use python :-).
>
>
> #!/usr/bin/env
On Thu, Sep 27, 2001 at 09:00:26AM +0200, A.R. (Tom) Peters wrote:
| On 27 Sep 2001, Jeremy Whetzel wrote:
|
| > I'm in the process of writing up a script that I need to be able to
| > "randomly" switch around the lines in a text file. (ala a random mp3
| > playlist) Would anyone have any suggest
On 27 Sep 2001, Jeremy Whetzel wrote:
> I'm in the process of writing up a script that I need to be able to
> "randomly" switch around the lines in a text file. (ala a random mp3
> playlist) Would anyone have any suggestions? I was originally thinking
> of using a random number generator for it,
On Thu, 27 Sep 2001, Dave Thayer wrote:
> On Thu, Sep 27, 2001 at 08:45:57PM -0500, Jeremy Whetzel wrote:
> >
> > I'm in the process of writing up a script that I need to be able to
> > "randomly" switch around the lines in a text file. (ala a random mp3
> > playlist) Would anyone have any sugges
On Thu, Sep 27, 2001 at 08:45:57PM -0500, Jeremy Whetzel wrote:
>
> I'm in the process of writing up a script that I need to be able to
> "randomly" switch around the lines in a text file. (ala a random mp3
> playlist) Would anyone have any suggestions? I was originally thinking
> of using a ran
cat list | \
perl -e 'srand; rand($.) < 1 && ($line = $_) while <>; print $line;'
-- as suggested on this list earlier, it will return a random line out
of the file list. if you want the entire list to be shuffled, then
search the archives for "random lines" and a post by me. in it's
replies, th
I'm in the process of writing up a script that I need to be able to
"randomly" switch around the lines in a text file. (ala a random mp3
playlist) Would anyone have any suggestions? I was originally thinking
of using a random number generator for it, but if there's a tool that
would work better.
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