Re:

Ruby
1

How to generate rand (random number) between two numbers?
I mean not between 0 and some number. It should be between some number (not 0)
and some number.

def range_rand(min,max)
min + rand(max-min)
end

This is the generally utility function I use. Throw in srand with a seed
if you’re using it for something related to security.

Regards,
Chris W.
http://www.twitter.com/cwgem

2

Also you can mod the number by the cardinality of your range and then
add
your lower bound.

3

My bad. I assumed errantly that ruby’s rand would default return a rand
number bounded by int size.

Too much C++ for me :stuck_out_tongue:

Thanks for the correction!

In Christ,
Karch

On Tue, Sep 20, 2011 at 4:02 AM, Robert K.

4

On Mon, Sep 19, 2011 at 7:34 PM, Karch [email protected] wrote:

Also you can mod the number by the cardinality of your range and then add
your lower bound.

That’s not a workable approach:

09:56:29 Temp$ ruby19 -e ‘p rand’
0.13646702557098767

So you need to use rand with an integer argument - and if you do that
there is no point in picking another value than the range size.
You’ll end up with the solution Chris proposed.

Kind regards

robert