小黑小波比.nodejs读取全部文件内容

var fs = require('fs');var a = function(p) {fs.readFile('1.txt', 'utf-8', function(err, data) {if (err) {console.error(err);} else {p.a = data;fs.readFile('2.txt', 'utf-8', function(err, data) {if (err) {console.error(err);} else {p.b = data;fs.readFile('3.txt', 'utf-8', function(err, data) {if (err) {console.error(err);} else {p.c = data;fs.readFile('4.txt', 'utf-8', function(err, data) {if (err) {console.error(err);} else {p.d = data;success(p);}});}});}});}})}

var success = function(a) {console.log(a);}var fail = function() {console.log("false");}a({});