Reads CSV format files and outputs them as a .json file with an array of row objects. Each property of the row object matches the column headers.

csv.js

var fs = require('fs'),
inputFile = process.argv[2],
outputFile = process.argv[3],
askingForHelp = process.argv[2] === "help" || process.argv[2] === "h";

if(askingForHelp){
  console.log("Parses a CSV into json");
  console.log('e.g node csv.js <inputFile> <outputFile>');
}
else if(!inputFile || !outputFile){
  console.error("An input and output file must be defined.");
}
else {
  console.info("Reading", inputFile + "...");
  fs.readFile(inputFile, { encoding: 'utf8' }, function(err, data){

     if (err)
       console.error(err);

      var rows = data.split(/\n/),
      // the first row has the column names
      rowAggregator = initRowAggregator(rows[0].split(";")),
      data = rows.slice(1, rows.length).reduce(rowAggregator, []);

      console.info("Writing", outputFile + "...");
      fs.writeFile(outputFile, JSON.stringify(data), function(err){ 
        if (err) 
          console.error(err);
        console.info("Done.");
      });
  });
   
}

 
function initRowAggregator(columnHeaders){

  // clean up the header names a bit
  columnHeaders = columnHeaders.map(function(header){
    return header.trim().toLowerCase();
  });

  return function aggregateRows(acc, item){
    var columnValues = item.split(/;/),
    rowObj = columnValues.reduce(function(obj, columnValue, index) {
      var columnHeader = columnHeaders[index];
      obj[columnHeader] = columnValue.trim();
      return obj;
    }, {});

    acc.push(rowObj);

    return acc;
  };

};