19 lines
		
	
	
		
			360 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			19 lines
		
	
	
		
			360 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| export default (function (o, c) {
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|   var proto = c.prototype;
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| 
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|   proto.weekYear = function () {
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|     var month = this.month();
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|     var weekOfYear = this.week();
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|     var year = this.year();
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| 
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|     if (weekOfYear === 1 && month === 11) {
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|       return year + 1;
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|     }
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| 
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|     if (month === 0 && weekOfYear >= 52) {
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|       return year - 1;
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|     }
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| 
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|     return year;
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|   };
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| }); |