CODEWITHSUNDEEP
rubyalgorithm
Kris MP
Kris MP

Reputation: 2415

Ruby how to generate a random number from a given number

I know how to generate a random number within a range in ruby:

rand(10..45)

but how to generate a number form a given number?

example:

def generate_random_number(n)
  #what to put here
end

if I run:

generate_random_number(123)

it will return an array of possible generated number from given number:

[123, 321, 231, 132 etc ...]

is there any ruby function to solve this?

Upvotes: 0

Views: 113

Answers (1)

Yu Hao
Yu Hao

Reputation: 122363

What you are looking for is permutation:

123.to_s.chars.permutation.map {|a| a.join.to_i}
# => [123, 132, 213, 231, 312, 321]

If you want the order to be random, shuffle it:

123.to_s.chars.permutation.map {|a| a.join.to_i}.shuffle
# => [312, 123, 213, 132, 231, 321]

Upvotes: 3

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