CODEWITHSUNDEEP
ruby
Hassan Javeed
Hassan Javeed

Reputation: 464

Generate numbers based on pattern

I want to generate four digit numbers (from 0000 to 9999) that look like ABCD and AABC. So for example the pattern ABCD will have numbers like

0123,0124,0125,0126,0127,0128,0129 so on.

Pattern AABC like:

0012,0013,0014,0015,0016 etc.

Upvotes: 0

Views: 172

Answers (1)

sawa
sawa

Reputation: 168091

(0..9).to_a.permutation(4).map{|a, b, c, d| [a, b, c, d].join}

(0..9).to_a.permutation(3).map{|a, b, c| [a, a, b, c].join}

Or

(0..9).to_a.permutation(4).map{|a, b, c, d| "#{a}#{b}#{c}#{d}"}

(0..9).to_a.permutation(3).map{|a, b, c| "#{a}#{a}#{b}#{c}"}

Upvotes: 2

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