9.05 Map (ম্যাপ)

var map = {'id': '50', 'category': 'beverage'};
print(map['category']); // Output: beverage
 

var map = {0.81: 'Venus', 1: 'Earth', 0.11: 'Mars', 17.15: 'Neptune'};
map.forEach((key, value) {
    print('$key: $value');
});
// Output:
// 0.81: Venus
// 1: Earth
// 0.11: Mars
// 17.15: Neptune
 

var map = {0.81: 'Venus', 1: 'Earth', 0.11: 'Mars', 17.15: 'Neptune'};
print(map.containsKey(1)); // Output: true
print(map.containsKey(2)); // Output: false
print(map.containsValue('Earth')); // Output: true
print(map.containsValue('Pluto')); // Output: false
 

var map = {0.81: 'Venus', 1: 'Unknown', 0.11: 'Mars'};
map.update(1, ((value) =\> 'Earth'));
print(map); // Output: {0.81: Venus, 1: Earth, 0.11: Mars}
 

var map = {1: 'One', 2: 'Two'};

map.addAll({3: 'Three', 4: 'Four'});
map.addEntries({5: 'Five', 6: 'Six'}.entries);
map.putIfAbsent(7, () =\> 'Seven');
map.putIfAbsent(6, () =\> 'Seven');

print(map);
// Output: {1: One, 2: Two, 3: Three, 4: Four, 5: Five, 6: Six, 7: Seven}