From: Robert K. [mailto:[email protected]]

On 14.11.2006 17:09, Josselin wrote:

but I don’t understand very well how to coordinate the sue

of srand and rand…I am not sure I understand you here. What does “sue” mean here?

I think Josselin meant “use”.

What about this?

def rand_seq(count, min, max)

(1…count).map { rand(max-min) + min }

end

=> nilrand_seq 10, -5, 5

=> [2, -4, -2, -1, -3, 1, 1, 1, -3, 0]

I think you have a fencepost error there…

irb(main):017:0> r = rand_seq( 1_000_000, -10, 10 )

irb(main):018:0> r.min

=> -10

irb(main):019:0> r.max

=> 9

…though it depends if the OP wanted min/max to be inclusive or

exclusive.

Also, it depends on if the OP wanted integers only or floats. If

floating point numbers are desired, here’s an alternative:

def rand_seq(count, min, max)

(1…count).map { rand * (max-min) + min }

end

r = rand_seq( 10_000_000, -10, 10 )

p r.min, r.max

#=> -9.99999704788504

#=> 9.99999886739173

p r[ 0…10 ]

#=> [6.89334712606148, -3.51560170870142, 3.62144692732178,

9.29043168269461, -8.24044290511051, -6.06086914781006,

-6.78123809802907, 7.52184969087783, -2.21712322878881,

-0.845330115529201, -2.82092973043312]