11 lines
300 B
JavaScript
11 lines
300 B
JavaScript
"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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