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5 | 5 |
|
6 | 6 | namespace IteratorPattern |
7 | 7 | { |
8 | | -class RadioStation |
9 | | -{ |
10 | | - private float mFrequency; |
11 | | - |
12 | | - public RadioStation(float frequency) |
13 | | - { |
14 | | - mFrequency = frequency; |
15 | | - } |
16 | | - |
17 | | - public float GetFrequecy() |
| 8 | + class RadioStation |
18 | 9 | { |
19 | | - return mFrequency; |
20 | | - } |
| 10 | + private float mFrequency; |
21 | 11 |
|
22 | | -} |
23 | | - |
24 | | -class StationList : IEnumerable |
25 | | -{ |
26 | | - private List<RadioStation> mStations; |
27 | | - |
28 | | - public StationList() |
29 | | - { |
30 | | - mStations = new List<RadioStation>(); |
31 | | - } |
| 12 | + public RadioStation(float frequency) |
| 13 | + { |
| 14 | + mFrequency = frequency; |
| 15 | + } |
32 | 16 |
|
33 | | - public voidAddStation(RadioStationstation) |
34 | | - { |
35 | | - mStations.Add(station); |
36 | | - } |
| 17 | + public floatGetFrequecy() |
| 18 | + { |
| 19 | + returnmFrequency; |
| 20 | + } |
37 | 21 |
|
38 | | - public void RemoveStation(RadioStation station) |
39 | | - { |
40 | | - mStations.Remove(station); |
41 | 22 | } |
42 | 23 |
|
43 | | - publicIEnumeratorGetEnumerator() |
| 24 | + classStationList:IEnumerable<RadioStation> |
44 | 25 | { |
45 | | - return new StationIterator(mStations); |
46 | | - } |
47 | | -} |
| 26 | + List<RadioStation> mStations = new List<RadioStation>(); |
48 | 27 |
|
49 | | -class StationIterator : IEnumerator |
50 | | -{ |
51 | | - private List<RadioStation> mStations; |
52 | | - private int currentPosition = -1; |
| 28 | + public RadioStation this[int index] |
| 29 | + { |
| 30 | + get { return mStations[index]; } |
| 31 | + set { mStations.Insert(index, value); } |
| 32 | + } |
53 | 33 |
|
54 | | - public object Current |
55 | | - { |
56 | | - get |
| 34 | + public void Add(RadioStation station) |
57 | 35 | { |
58 | | - returnmStations[currentPosition]; |
| 36 | + mStations.Add(station); |
59 | 37 | } |
60 | | - } |
61 | 38 |
|
62 | | - public StationIterator(List<RadioStation> stations) |
63 | | - { |
64 | | - mStations = stations; |
65 | | - } |
66 | | - public bool MoveNext() |
67 | | - { |
68 | | - if(currentPosition < mStations.Count - 1) |
| 39 | + public void Remove(RadioStation station) |
69 | 40 | { |
70 | | - currentPosition = currentPosition + 1; |
71 | | - return true; |
| 41 | + mStations.Remove(station); |
72 | 42 | } |
73 | 43 |
|
74 | | - return false; |
75 | | - } |
| 44 | + public IEnumerator<RadioStation> GetEnumerator() |
| 45 | + { |
| 46 | + return mStations.GetEnumerator(); |
| 47 | + } |
76 | 48 |
|
77 | | - public void Reset() |
78 | | - { |
79 | | - currentPosition = -1; |
| 49 | + IEnumerator IEnumerable.GetEnumerator() |
| 50 | + { |
| 51 | + //Use can switch to this internal collection if you do not want to transform |
| 52 | + //return this.GetEnumerator(); |
| 53 | + |
| 54 | + //use this if you want to transform the object before rendering |
| 55 | + foreach (var x in mStations) |
| 56 | + { |
| 57 | + yield return x; |
| 58 | + } |
| 59 | + } |
80 | 60 | } |
81 | | -} |
82 | 61 |
|
83 | | -class Program |
84 | | -{ |
85 | | - static void Main(string[] args) |
| 62 | + class Program |
86 | 63 | { |
87 | | - var stations = new StationList(); |
88 | | - var station1 = new RadioStation(89); |
89 | | - stations.AddStation(station1); |
| 64 | + static void Main(string[] args) |
| 65 | + { |
| 66 | + var stations = new StationList(); |
| 67 | + var station1 = new RadioStation(89); |
| 68 | + stations.Add(station1); |
90 | 69 |
|
91 | | - var station2 = new RadioStation(101); |
92 | | - stations.AddStation(station2); |
| 70 | + var station2 = new RadioStation(101); |
| 71 | + stations.Add(station2); |
93 | 72 |
|
94 | | - var station3 = new RadioStation(102); |
95 | | - stations.AddStation(station3); |
| 73 | + var station3 = new RadioStation(102); |
| 74 | + stations.Add(station3); |
96 | 75 |
|
97 | | - foreach(RadioStationstation in stations) |
98 | | - { |
99 | | - Console.WriteLine(station.GetFrequecy()); |
100 | | - } |
| 76 | + foreach(varx in stations) |
| 77 | + { |
| 78 | + Console.Write(x.GetFrequecy()); |
| 79 | + } |
101 | 80 |
|
102 | | - stations.RemoveStation(station2); // Will Remove station 101 |
| 81 | + var q = stations.Where(x => x.GetFrequecy() == 89).FirstOrDefault(); |
| 82 | + Console.WriteLine(q.GetFrequecy()); |
103 | 83 |
|
104 | | - Console.ReadLine(); |
| 84 | + Console.ReadLine(); |
| 85 | + } |
105 | 86 | } |
106 | 87 | } |
107 | | -} |
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