Question

我正在编写一个节点脚本，该脚本应该将目录和扩展名称作为args，并记录该目录中以该扩展名结尾的所有文件。听起来很简单，但我的脚本返回一个空数组：

var fs = require('fs');
var ref = process.argv[2];
var extension = process.argv[3];
var files = [];
var dir = fs.readdir(ref, function(err, list){
    if (err) throw err;    
    var filterRx = new RegExp("\." + extension + "$");
    files = list.filter(function(val){
        return filterRx.test(val);
    });


});
console.log(files);

任何人都可以帮助我理解为什么这不能按预期工作吗？

编辑：例如，给定一个包含以下文件的目录（在回调中由console.log(list)给出）：

   "[ 'CHANGELOG.md',"                 !=    "LICENCE.md"                       
   "  'LICENCE.md',"                   !=    "README.md"                        
   "  'README.md',"                    !=    ""                                 
   "  'dat',"                          !=                                       
   "  'data.dat',"                     !=                                       
   "  'data.json',"                    !=                                       
   "  'learnyounode.dat',"             !=                                       
   "  'learnyounode.sql',"             !=                                       
   "  'learnyounode.txt',"             !=                                       
   "  'md',"                           !=                                       
   "  'w00t.dat',"                     !=                                       
   "  'w00t.txt',"                     !=                                       
   "  'words.dat',"                    !=                                       
   "  'wrrrrongdat' ]"

通过第二个参数"md"，我应该得到＆＃34; CHANGELOG.md＆＃34;，＆＃34; LICENSE.md＆＃34;等

我只得到[]：/

为什么这个节点脚本没有过滤

0 个答案: