Slides template

 let planets = [
  { name: 'mars', diameter: 6779 },
]

 let planets = [
  { name: 'mars', diameter: 6779 },
  { name: 'earth', diameter: 12742 },
  { name: 'jupiter', diameter: 139820 }
]

 let circumferenceReducer = ( c, planet ) => {
  return c + planet.diameter * Math.PI;
}
 
let planets = [
  { name: 'mars', diameter: 6779 },
  { name: 'earth', diameter: 12742 },
  { name: 'jupiter', diameter: 139820 }
]
 
let c = planets.reduce( circumferenceReducer, 0 )

let planets = [ { name: 'mars' , diameter: 6779 }, ]

	let planets = [
	{ name: 'mars', diameter: 6779 },
	{ name: 'earth', diameter: 12742 },
	{ name: 'jupiter', diameter: 139820 }
	]

	let circumferenceReducer = ( c, planet ) => {
	return c + planet.diameter * Math.PI;
	}

	let planets = [
	{ name: 'mars', diameter: 6779 },
	{ name: 'earth', diameter: 12742 },
	{ name: 'jupiter', diameter: 139820 }
	]

	let c = planets.reduce( circumferenceReducer, 0 )