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12
Task/Kaprekar-numbers/JavaScript/kaprekar-numbers-1.js
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12
Task/Kaprekar-numbers/JavaScript/kaprekar-numbers-1.js
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function isKaprekar( n, bs ) {
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if ( n < 1 ) return false
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if ( n == 1 ) return true
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bs = bs || 10
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var s = (n * n).toString(bs)
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for (var i=1, e=s.length; i<e; i+=1) {
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var a = parseInt(s.substr(0, i), bs)
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var b = parseInt(s.substr(i), bs)
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if (b && a + b == n) return true
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}
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return false
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}
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