data vs datum

data-vs-datum.js

var list = [
  {obj},
  {obj},
  {obj},
  {obj},
  {obj},
  {obj},
  {obj},
  {obj},
  {obj}
]


var response = {
  length: 10,
  results: [
    {obj},
    {obj},
    {obj},
    {obj},
    {obj},
    {obj},
    {obj},
    {obj},
    {obj},
    {obj}
  ]
}


d3.selectAll('.container').data(list).enter()

d3.select('.container').datum(response)
  .attr('data-length', function(d){
    return d.length
  })
  .selectAll('.item').data(function(d){
    return d.results
  }).enter()
  .append('div')
    .attr('data-name', function(d){
      return d.name
    })