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"use strict";

var isPrototype = require("../prototype/is");

module.exports = function (value) {
	if (typeof value !== "function") return false;

	if (!hasOwnProperty.call(value, "length")) return false;

	try {
		if (typeof value.length !== "number") return false;
		if (typeof value.call !== "function") return false;
		if (typeof value.apply !== "function") return false;
	} catch (error) {
		return false;
	}

	return !isPrototype(value);
};