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24 lines
401 B
24 lines
401 B
'use strict';
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var isFinite = require('is-finite');
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module.exports = function (str, n) {
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if (typeof str !== 'string') {
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throw new TypeError('Expected `input` to be a string');
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}
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if (n < 0 || !isFinite(n)) {
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throw new TypeError('Expected `count` to be a positive finite number');
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}
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var ret = '';
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do {
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if (n & 1) {
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ret += str;
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}
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str += str;
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} while ((n >>= 1));
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return ret;
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};
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