JavaScript method to get all parameter names of function_javascript tips

I wrote a JavaScript function to parse the parameter names of the function, the code is as follows:

function getArgs(func) {
 // 先用正则匹配,取得符合参数模式的字符串.
 // 第一个分组是这个: ([^)]*) 非右括号的任意字符
 var args = func.toString().match(/function\s.*?\(([^)]*)\)/)[1];
 // 用逗号来分隔参数(arguments string).
 return args.split(",").map(function(arg) {
  // 去除注释(inline comments)以及空格
  return arg.replace(/\/\*.*\*\//, "").trim();
 }).filter(function(arg) {
  // 确保没有 undefined.
  return arg;
 });
}

The above is the detection function, the sample code is as follows:

function myCustomFn(arg1, arg2,arg3) {
 // ...
}
// ["arg1", "arg2", "arg3"]
console.log(getArgs(myCustomFn)); 

Is regular expression a good thing? I don’t know anything else, but it is still very powerful when used in appropriate scenarios!

comes with a Java method to get the current function name: Java gets the function name of the current function in the function

public class Test { 
  private String getMethodName() { 
    StackTraceElement[] stacktrace = Thread.currentThread().getStackTrace(); 
    StackTraceElement e = stacktrace[2]; 
    String methodName = e.getMethodName(); 
    return methodName; 
  } 
  public void getXXX() { 
    String methodName = getMethodName(); 
    System.out.println(methodName); 
  } 
  public void getYYY() { 
    String methodName = getMethodName(); 
    System.out.println(methodName); 
  } 
  public static void main(String[] args) { 
    Test test = new Test(); 
    test.getXXX(); 
    test.getYYY(); 
  } 
}

【Run results】

getXXX
getYYY

【Attention】

In line 5 of the code, stacktrace[0].getMethodName() is getStackTrace, stacktrace[1].getMethodName() is getMethodName, and stacktrace[2].getMethodName() is the function name of the function that calls getMethodName.

// Note: the position inside stacktrace;
// [1] is "getMethodName", [2] is the method that calls this method

public static String getMethodName() { 
  StackTraceElement[] stacktrace = Thread.currentThread().getStackTrace(); 
  StackTraceElement e = stacktrace[2]; 
  String methodName = e.getMethodName(); 
  return methodName; 
}

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