temberature · November 28, 2018 10:45
diff --git a/alterFunctionByMetaPrograming.js b/alterFunctionByMetaPrograming.js
 var a = function(){console.log('原始');}
 console.log(a, a())

 var b = eval('(' + a.toString().replace('(){', '(){console.log("开头");').replace('}', 'console.log("结尾");}') + ')')
 console.log(b, b())
	var a = function(){console.log('原始');}
	console.log(a, a())

	var b = eval('(' + a.toString().replace('(){', '(){console.log("开头");').replace('}', 'console.log("结尾");}') + ')')
	console.log(b, b())