15 lines
		
	
	
		
			360 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			15 lines
		
	
	
		
			360 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| "use strict";
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| 
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| Object.defineProperty(exports, "__esModule", {
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|     value: true
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| });
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| exports.default = onlyOnce;
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| function onlyOnce(fn) {
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|     return function (...args) {
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|         if (fn === null) throw new Error("Callback was already called.");
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|         var callFn = fn;
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|         fn = null;
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|         callFn.apply(this, args);
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|     };
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| }
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| module.exports = exports.default; |