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10 lines
300 B
10 lines
300 B
"use strict"; |
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var isNatural = require("../number/is-natural") |
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, toShortString = require("../to-short-string-representation"); |
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module.exports = function (arg) { |
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var num = Number(arg); |
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if (!isNatural(num)) throw new TypeError(toShortString(arg) + " is not a natural number"); |
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return num; |
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};
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