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