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oieioi/arraySample.coffee

Created July 26, 2017 02:17
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arraySample.coffee
Array.prototype.sample = (size = 1)->
dup = @concat()
[0...size].map ->
randomNumber = (Math.floor(Math.random() * dup.length))
dup.splice(randomNumber, 1)[0]
.filter (item)-> item
console.log [1,2,3,4,5].sample()
console.log [1,2,3,4,5].sample(3)
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