Download a wikipedia table as a .json file. Requires jquery and artoo.

scrape_wikipedia_table.js

function tableToJson(table) {
  var data = [];

  // first row needs to be headers
  var headers = [];
  for (var i=0; i<table.rows[0].cells.length; i++) {
    headers[i] = table.rows[0].cells[i].innerHTML.toLowerCase().replace(/ /gi,'');
  }

  // go through cells
  for (var i=1; i<table.rows.length; i++) {
    var tableRow = table.rows[i];
    var rowData = {};
    for (var j=0; j<tableRow.cells.length; j++) {
      rowData[ headers[j] ] = tableRow.cells[j].innerText;
    }
    data.push(rowData);
  }

  return data;
}

var data = {};
$("table.wikitable").each(function(i,table){
    var json = tableToJson(table);

    $.each(json, function(i,row){
      if(data[row.name]){
        $.extend(data[row.name] || {}, row);
      }else{
        data[row.name] = row;
      }
    })
})

artoo.saveCsv($.map(data, function(e){return e}))
// tableToJson()