Making multiple objects without the constructor function, which one do you like?

1.js

var particles = [];

function setup() {
  for (var i = 0; i < 10; i++) {
    particles[i] = {
      x: 100,
      y: 100,
      display: function() {
        ellipse(this.x, this.y, 16, 16);
      }
    }
  }
}

2.js

var particles = [];

function setup() {
  for (var i = 0; i < 10; i++) {
    var particle = {
      x: 100,
      y: 100,
      display: function() {
        ellipse(this.x, this.y, 16, 16);
      }
    }
    particles.push(particle);
  }
}

3.js

var particles = [];

function setup() {
  for (var i = 0; i < 10; i++) {
    particles[i] = makeParticle();
  }
}

function makeParticle() {
  var particle = {
    x: 100,
    y: 100,
    display: function() {
      ellipse(this.x, this.y, 16, 16);
    }
  }
  return particle;
}