const columns = [];
var result;

_.times(100, (i) => columns.push( {i: "pos" + i, "key": "key" + i, width: _.random(100)}));
//uncomment to see dataset in the console
//console.log("This is the dataset:");
//console.log(columns);

function projectES6(...properties)
{
  return function project(object, index, array)
    {
      return _.pick(object, ...properties);
    };
}

function projectBIND(/* properties here */)
{
  var properties = arguments;
  return function project(object, index, array)
    {
      return _.pick.bind(null, object).apply(null, properties);
    };
}

function projectCONCAT(/* properties here */)
{
  var properties = Array.from(arguments);
  return function project(object, index, array)
    {
      return _.pick.apply(null, [].concat(object, properties));
    };
}

function projectUNSHIFT(/* properties here */)
{
  var properties = Array.from(arguments);
  return function project(object, index, array)
    {
      properties.unshift(object);
      return _.pick.apply(null, properties);
    };
}