javascript - 使用 fs [node js] 将文本从文本文件转换为数组

Question

我有一个txt文件包含:

{"date":"2013/06/26","statement":"insert","nombre":1} {"date":"2013/06/26","statement":"insert","nombre":1} {"date":"2013/06/26","statement":"select","nombre":4}

如何将文本文件的内容转换为数组，例如:

statement = [
{"date":"2013/06/26","statement":"insert","nombre":1}, {"date":"2013/06/26","statement":"insert","nombre":1}, {"date":"2013/06/26","statement":"select","nombre":4}, ];

我使用fs模块node js。谢谢

抱歉我会更详细地解释:

我有一个数组:

st = [
    {"date":"2013/06/26","statement":"insert","nombre":1},
    {"date":"2013/06/26","statement":"insert","nombre":5},
    {"date":"2013/06/26","statement":"select","nombre":4},
];

如果我使用此代码:

var arr = new LINQ(st)
    .OrderBy(function(x) {return x.nombre;})
    .Select(function(x) {return x.statement;})
    .ToArray();

我得到了我想要的结果。

insert select insert

但问题是我的数据位于文本文件中。任何建议，再次感谢。

Answer 1

没有理由不自己做文件解析器。这适用于任何大小的文件:

var fs = require('fs');

var fileStream = fs.createReadStream('file.txt');

var data = "";

fileStream.on('readable', function() {
  //this functions reads chunks of data and emits newLine event when \n is found
  data += fileStream.read();
  while( data.indexOf('\n') >= 0 ){
    fileStream.emit('newLine', data.substring(0,data.indexOf('\n')));
    data = data.substring(data.indexOf('\n')+1);
  }
});

fileStream.on('end', function() {
  //this functions sends to newLine event the last chunk of data and tells it
  //that the file has ended
  fileStream.emit('newLine', data , true);
});

var statement = [];

fileStream.on('newLine',function(line_of_text, end_of_file){
    //this is the code where you handle each line
    // line_of_text = string which contains one line
    // end_of_file = true if the end of file has been reached
    statement.push( JSON.parse(line_of_text) );
    if(end_of_file){
               console.dir(statement);
               //here you have your statement object ready
    }
});