nodejs 像 C 語言那樣輸出當前代碼的行數

 

http://stackoverflow.com/questions/11386492/accessing-line-number-in-v8-javascript-chrome-node-js

Object.defineProperty(global, '__stack', {
  get: function(){
    var orig = Error.prepareStackTrace;
    Error.prepareStackTrace = function(_, stack){ return stack; };
    var err = new Error;
    Error.captureStackTrace(err, arguments.callee);
    var stack = err.stack;
    Error.prepareStackTrace = orig;
    return stack;
  }
});

Object.defineProperty(global, '__line', {
  get: function(){
    return __stack[1].getLineNumber();
  }
});

console.log(__line);

上面的代碼應該輸出 19

 

另外

__dirname　　當前路徑   /Users/dev08/test

__filename　　當前文件名  /Users/dev08/test/sc.js