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| 1 | +class Park { |
| 2 | + constructor(name, area, numberOfTrees, age) { |
| 3 | + this.name = name, |
| 4 | + this.area = area, |
| 5 | + this.numberOfTrees = numberOfTrees, |
| 6 | + this.age = age |
| 7 | + } |
| 8 | + getTreeDensity(park) { |
| 9 | + return park.numberOfTrees / park.area; |
| 10 | + } |
| 11 | +} |
| 12 | + |
| 13 | +class Street { |
| 14 | + constructor(name, length, yearBuilt, size) { |
| 15 | + this.name = name, |
| 16 | + this.length = length, |
| 17 | + this.yearBuilt = yearBuilt, |
| 18 | + this.size = size, |
| 19 | + this.sizeClassification = this.sizeClassification(); |
| 20 | + } |
| 21 | + |
| 22 | + sizeClassification() { |
| 23 | + const streetSize = this.size; |
| 24 | + if (!streetSize) { |
| 25 | + return 'normal'; |
| 26 | + } |
| 27 | + if (streetSize > 20) { |
| 28 | + return 'huge'; |
| 29 | + } |
| 30 | + if (streetSize > 10 ) { |
| 31 | + return 'big' |
| 32 | + } |
| 33 | + return 'small'; |
| 34 | + } |
| 35 | +} |
| 36 | + |
| 37 | +class Town { |
| 38 | + constructor(name, parks, streets) { |
| 39 | + this.name = name, |
| 40 | + this.parks = parks, |
| 41 | + this.streets = streets |
| 42 | + } |
| 43 | + getAverageAges() { |
| 44 | + let avrg = 0; |
| 45 | + this.parks.forEach(park => { |
| 46 | + avrg += park.age; |
| 47 | + }); |
| 48 | + return avrg; |
| 49 | + } |
| 50 | + |
| 51 | + getParkWith1000Trees() { |
| 52 | + const park = this.parks.find(({numberOfTrees}) => numberOfTrees >= 1000); |
| 53 | + return park.name; |
| 54 | + } |
| 55 | + |
| 56 | + getTotalLenghtOfStreets() { |
| 57 | + let total = 0; |
| 58 | + this.streets.forEach(street => { |
| 59 | + total += street.length; |
| 60 | + }); |
| 61 | + return total; |
| 62 | + } |
| 63 | + getAvergLenghtOfStreets() { |
| 64 | + return this.getTotalLenghtOfStreets() / this.streets.length; |
| 65 | + } |
| 66 | +} |
| 67 | + |
| 68 | +{ |
| 69 | + const park1 = new Park('Green Park', 156, 50, 500); |
| 70 | + const park2 = new Park('National Park', 156, 50, 200); |
| 71 | + const park3 = new Park('Naional Park', 156, 1000, 1100); |
| 72 | + |
| 73 | + const allParks = [park1, park2, park3]; |
| 74 | + |
| 75 | + const street1 = new Street('Ocean Avenue', 20, 1999, 11); |
| 76 | + const street2 = new Street('Evergreen Street', 20, 2008, 10); |
| 77 | + const street3 = new Street('4th Street', 20, 2015); |
| 78 | + const street4 = new Street('Sunset Boulevard', 20, 1982, 21); |
| 79 | + |
| 80 | + const allStreets = [street1, street2, street3, street4]; |
| 81 | + |
| 82 | + const town = new Town('The Town', allParks, allStreets); |
| 83 | + |
| 84 | + console.log('-----------------------PARKS REPORT-------------------------------------'); |
| 85 | + console.log(`Our ${town.parks.length} parks have an average age of ${town.getAverageAges()} years.`) |
| 86 | + town.parks.forEach(park => { |
| 87 | + console.log(`${park.name} has a tree density of ${park.getTreeDensity(park)} trees per square km.`); |
| 88 | + }); |
| 89 | + console.log(`${town.getParkWith1000Trees()} has more than 1000 trees.`) |
| 90 | + console.log('----------------------STREETS REPORT------------------------------------'); |
| 91 | + console.log(`Our ${town.streets.length} streets have a total lenght of ${town.getTotalLenghtOfStreets()} km, with an average of ${town.getAvergLenghtOfStreets()} km.`); |
| 92 | + town.streets.forEach(street => { |
| 93 | + console.log(`${street.name}, built in ${street.yearBuilt}, is a ${street.sizeClassification} street`); |
| 94 | + }); |
| 95 | +} |
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