7 lines
200 B
Groovy
7 lines
200 B
Groovy
def Y = { le -> ({ f -> f(f) })({ f -> le { Object[] args -> f(f)(*args) } }) }
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def mul = Y { mulStar -> { a, b -> a ? b + mulStar(a - 1, b) : 0 } }
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1.upto(10) {
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assert mul(it, 10) == it * 10
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}
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