I'm trying to make a unique list of all the values assigned to the city property, which is buried in an object within an object, and I have an array of such objects
buildings = [
{
name: 'Victoria Bell Tower',
filterOptions: {
city: 'Ottowa',
state: 'Canada',
buildingType: 'Parliament Building',
},
},
{
name: 'Cathedral',
filterOptions: {
city: 'Washington D.C.',
state: '',
buildingType: 'Cathedral',
},
},
{
name: 'Post Office',
filterOptions: {
city: 'Washington D.C.',
state: '',
buildingType: 'Post Office',
},
}]
What's a practical way to get a unique array of the cities properties:
cities = ['Ottowa', 'Washington D.C.']