Created
July 15, 2019 02:22
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shuffe array
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function shuffle(a) { | |
for (let i = a.length - 1; i > 0; i--) { | |
const j = Math.floor(Math.random() * (i + 1)); | |
[a[i], a[j]] = [a[j], a[i]]; | |
} | |
return a; | |
}; |
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