25 lines
396 B
JavaScript
25 lines
396 B
JavaScript
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'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 a string as the first argument');
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}
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if (n < 0 || !isFinite(n)) {
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throw new TypeError('Expected a finite positive 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 = n >> 1);
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return ret;
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};
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