8 lines
		
	
	
		
			163 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			8 lines
		
	
	
		
			163 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
"use strict";
 | 
						|
 | 
						|
module.exports = function () {
 | 
						|
	var sign = Math.sign;
 | 
						|
	if (typeof sign !== "function") return false;
 | 
						|
	return sign(10) === 1 && sign(-20) === -1;
 | 
						|
};
 |