Let's say we have a random number generator using this:
SecureRandom.random_number(10)
Which gives you a random number from 0 to 10.
Would it be possible to exclude the number from it? Let's say it would be 8.
I was thinking about something about this:
[SecureRandom.random_number(10)].grep_v(8)
But might be there is a more correct and optimized way?
Ruby 2.7.2
Rails 6.1.2
Instead of generating a number up to 10, you could generate a number up to 9 and if the result is 8 or above, add 1:
number = SecureRandom.random_number(9)
number += 1 if number >= 8
Or you could generate a list of valid numbers and pick one of them randomly, eg via sample
:
VALID_NUMBERS = [0, 1, 2, 3, 4, 5, 6, 7, 9]
number = VALID_NUMBERS.sample(random: SecureRandom)
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