Transform an array-of-arrays style JSON table file (with header row) into an array-of-objects format

json-table-transform.js

'use strict';

const fs = require('fs');
const files = process.argv.slice(2);

function transformRow(row, headers) {
  let outObj = {};
  for (let i=0; i<headers.length; i++) {
    outObj[headers[i]] = row[i];
  }
  return outObj;
}

for (let filename of files) {
  let tableJson = require("./" + filename)['data'];

  let headers;
  let outRows = [];
  for (let row of tableJson) {
    if (!headers) {
      headers = row;
    } else {
      outRows.push(transformRow(row, headers));
    }
  }

  fs.writeFileSync("output/" + filename, JSON.stringify(outRows, null, 2));
  console.log("wrote " + filename);
}