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  1. const A = [0,7,8,15,16,23,24,31]
  2. const B = [1,2,3,4,5,6,25,26,27,28,29,30,9,17,22 ]
  3. const C = [10,11,12,13,18,19,20,21, 14]
  4.  
  5. function shuffleBoard(length) {
  6.   const result = []
  7.  
  8.   for(let i = 0; i < length; i += 1) {
  9.     while (true) {
  10.       let bucket = null
  11.       let rand = Math.random()
  12.       if (rand < 0.5) {
  13.         bucket = A
  14.       } else if (rand < 0.95) {
  15.         bucket = B
  16.       } else {
  17.         bucket = C
  18.       }
  19.  
  20.       const pick = bucket[Math.floor(Math.random() * bucket.length)]
  21.  
  22.       if (!result.slice(-6).includes(pick)) {
  23.         result.push(pick)
  24.         break
  25.       }
  26.     }
  27.   }
  28.  
  29.   return result
  30. }
  31.  
  32. function validate(result) {
  33.   const ratios = {
  34.     'A': result.filter(xs => A.includes(xs)).length / result.length,
  35.     'B': result.filter(xs => B.includes(xs)).length / result.length,
  36.     'C': result.filter(xs => C.includes(xs)).length / result.length,
  37.   }
  38.  
  39.   return ratios
  40. }
  41.  
  42. const result = shuffleBoard(5000)
  43. console.log(JSON.stringify(validate(result)))
  44.  
  45.  
Success #stdin #stdout 0.05s 18976KB
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{"A":0.4406,"B":0.4966,"C":0.0628}
https://ideone.com/bp66nl
language:
JavaScript (SMonkey 60.2.3)
created:
2 years ago
visibility:
secret

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