Expressing Designs in C# - Effective C# - page 132

public class WeatherData
{
public double Temperature { get ; set ; }
public int WindSpeed { get ; set ; }
public Direction WindDirection { get ; set ; }
public override string ToString()
{
return string .Format(
"Temperature = {0}, Wind is {1} mph from the {2}" ,
Temperature, WindSpeed, WindDirection);
}
}
public class WeatherDataStream : IEnumerable < WeatherData >
{
private Random generator = new Random ();
public WeatherDataStream( string location)
{
// elided
}
private IEnumerator < WeatherData > getElements()
{
// Real implementation would read from
// a weather station.
for ( int i = 0 ; i < 100 ; i++)
yield return new WeatherData
{
Temperature = generator.NextDouble() * 90 ,
WindSpeed = generator.Next( 70 ),
WindDirection = ( Direction )generator.Next( 7 )
};
}
#region IEnumerable<WeatherData> Members
public IEnumerator < WeatherData > GetEnumerator()
{
return getElements();
}
#endregion