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20 lines
470 B
Go
20 lines
470 B
Go
package lottery
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import (
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"math/rand"
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"sort"
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)
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// drawUnique returns count unique numbers in the range [1, max].
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// It uses the rand.Perm function to generate a random permutation of numbers and selects the first count numbers from it.
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// The result is sorted before being returned.
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func drawUnique(count, max int) []int {
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perm := rand.Perm(max)
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result := make([]int, count)
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for i := range result {
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result[i] = perm[i] + 1
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}
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sort.Ints(result)
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return result
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}
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