Simplify Converting List to SortedSet
3
I am trying to simplify my solution below where I am trying to convert a List<DateTime> to SortedSet<long>. I am wondering if this is even possible?
List<DateTime> dateTimes = new List<DateTime>();
dateTimes.Add(...);
// simplify the 5 lines below into 1 line
SortedSet<long> timestamps = new SortedSet<long>();
foreach(DateTime dateTime in dateTimes)
{
timestamps.Add(convertDateTimeToTimestamp(dateTime));
}
I have been able to convert a List<float> to List<double> via:
List<float> average = new List<float>();
average.Add(...);
List<double> newAverage = average.Select(x => (double?)x).ToList();
I however was unable to find a .ToSet() or .ToSortedSet() method.
c#
asked Nov 14 '18 at 0:49
JonJon
2,933165998
|
show 4 more comments
3
I am trying to simplify my solution below where I am trying to convert a List<DateTime> to SortedSet<long>. I am wondering if this is even possible?
List<DateTime> dateTimes = new List<DateTime>();
dateTimes.Add(...);
// simplify the 5 lines below into 1 line
SortedSet<long> timestamps = new SortedSet<long>();
foreach(DateTime dateTime in dateTimes)
{
timestamps.Add(convertDateTimeToTimestamp(dateTime));
}
I have been able to convert a List<float> to List<double> via:
List<float> average = new List<float>();
average.Add(...);
List<double> newAverage = average.Select(x => (double?)x).ToList();
I however was unable to find a .ToSet() or .ToSortedSet() method.
c#
asked Nov 14 '18 at 0:49
JonJon
2,933165998
There is a.ToHashSet()method, but not a.ToSortedSet()method.
– John
Nov 14 '18 at 1:00
@John Ahh, thank you. Is there a reason why there would not be a.ToSortedSet()?
– Jon
Nov 14 '18 at 1:04
On looking more closely, it seems that.ToHashSet()doesn't exist in .NET Framework, but does in .NET Core and presumably .NET Standard. It seems like a new addition. Maybe they will add more in future.
– John
Nov 14 '18 at 1:06
2
@Jon: The reason why there is not a feature you want is always the same: No one implemented that feature. In order for you to use a feature, someone has to implement it. You didn't implement it, and no one else did either. Why didn't you implement it?
– Eric Lippert
Nov 14 '18 at 1:30
@EricLippert To be frank, I am surprised .NET went forToList()instead of genericToCollection<T>() where T: ICollection<T>method.
– Joker_vD
Nov 14 '18 at 7:13
|
show 4 more comments
3
3
3
I am trying to simplify my solution below where I am trying to convert a List<DateTime> to SortedSet<long>. I am wondering if this is even possible?
List<DateTime> dateTimes = new List<DateTime>();
dateTimes.Add(...);
// simplify the 5 lines below into 1 line
SortedSet<long> timestamps = new SortedSet<long>();
foreach(DateTime dateTime in dateTimes)
{
timestamps.Add(convertDateTimeToTimestamp(dateTime));
}
I have been able to convert a List<float> to List<double> via:
List<float> average = new List<float>();
average.Add(...);
List<double> newAverage = average.Select(x => (double?)x).ToList();
I however was unable to find a .ToSet() or .ToSortedSet() method.
c#
asked Nov 14 '18 at 0:49
JonJon
2,933165998
I am trying to simplify my solution below where I am trying to convert a List<DateTime> to SortedSet<long>. I am wondering if this is even possible?
List<DateTime> dateTimes = new List<DateTime>();
dateTimes.Add(...);
// simplify the 5 lines below into 1 line
SortedSet<long> timestamps = new SortedSet<long>();
foreach(DateTime dateTime in dateTimes)
{
timestamps.Add(convertDateTimeToTimestamp(dateTime));
}
I have been able to convert a List<float> to List<double> via:
List<float> average = new List<float>();
average.Add(...);
List<double> newAverage = average.Select(x => (double?)x).ToList();
I however was unable to find a .ToSet() or .ToSortedSet() method.
c#
c#
asked Nov 14 '18 at 0:49
JonJon
2,933165998
asked Nov 14 '18 at 0:49
JonJon
2,933165998
asked Nov 14 '18 at 0:49
JonJon
2,933165998
asked Nov 14 '18 at 0:49
JonJon
2,933165998
asked Nov 14 '18 at 0:49
JonJon
2,933165998
2,933165998
There is a.ToHashSet()method, but not a.ToSortedSet()method.
– John
Nov 14 '18 at 1:00
@John Ahh, thank you. Is there a reason why there would not be a.ToSortedSet()?
– Jon
Nov 14 '18 at 1:04
On looking more closely, it seems that.ToHashSet()doesn't exist in .NET Framework, but does in .NET Core and presumably .NET Standard. It seems like a new addition. Maybe they will add more in future.
– John
Nov 14 '18 at 1:06
2
@Jon: The reason why there is not a feature you want is always the same: No one implemented that feature. In order for you to use a feature, someone has to implement it. You didn't implement it, and no one else did either. Why didn't you implement it?
– Eric Lippert
Nov 14 '18 at 1:30
@EricLippert To be frank, I am surprised .NET went forToList()instead of genericToCollection<T>() where T: ICollection<T>method.
– Joker_vD
Nov 14 '18 at 7:13
|
show 4 more comments
There is a.ToHashSet()method, but not a.ToSortedSet()method.
– John
Nov 14 '18 at 1:00
@John Ahh, thank you. Is there a reason why there would not be a.ToSortedSet()?
– Jon
Nov 14 '18 at 1:04
On looking more closely, it seems that.ToHashSet()doesn't exist in .NET Framework, but does in .NET Core and presumably .NET Standard. It seems like a new addition. Maybe they will add more in future.
– John
Nov 14 '18 at 1:06
2
@Jon: The reason why there is not a feature you want is always the same: No one implemented that feature. In order for you to use a feature, someone has to implement it. You didn't implement it, and no one else did either. Why didn't you implement it?
– Eric Lippert
Nov 14 '18 at 1:30
@EricLippert To be frank, I am surprised .NET went forToList()instead of genericToCollection<T>() where T: ICollection<T>method.
– Joker_vD
Nov 14 '18 at 7:13
There is a
.ToHashSet() method, but not a .ToSortedSet() method.– John
Nov 14 '18 at 1:00
There is a
.ToHashSet() method, but not a .ToSortedSet() method.– John
Nov 14 '18 at 1:00
@John Ahh, thank you. Is there a reason why there would not be a
.ToSortedSet()?– Jon
Nov 14 '18 at 1:04
@John Ahh, thank you. Is there a reason why there would not be a
.ToSortedSet()?– Jon
Nov 14 '18 at 1:04
On looking more closely, it seems that
.ToHashSet() doesn't exist in .NET Framework, but does in .NET Core and presumably .NET Standard. It seems like a new addition. Maybe they will add more in future.– John
Nov 14 '18 at 1:06
On looking more closely, it seems that
.ToHashSet() doesn't exist in .NET Framework, but does in .NET Core and presumably .NET Standard. It seems like a new addition. Maybe they will add more in future.– John
Nov 14 '18 at 1:06
2
2
@Jon: The reason why there is not a feature you want is always the same: No one implemented that feature. In order for you to use a feature, someone has to implement it. You didn't implement it, and no one else did either. Why didn't you implement it?
– Eric Lippert
Nov 14 '18 at 1:30
@Jon: The reason why there is not a feature you want is always the same: No one implemented that feature. In order for you to use a feature, someone has to implement it. You didn't implement it, and no one else did either. Why didn't you implement it?
– Eric Lippert
Nov 14 '18 at 1:30
@EricLippert To be frank, I am surprised .NET went for
ToList() instead of generic ToCollection<T>() where T: ICollection<T> method.– Joker_vD
Nov 14 '18 at 7:13
@EricLippert To be frank, I am surprised .NET went for
ToList() instead of generic ToCollection<T>() where T: ICollection<T> method.– Joker_vD
Nov 14 '18 at 7:13
|
show 4 more comments
1 Answer
1
active
oldest
votes
2
What about using the constructor overload that takes IEnumerable<T>?:
timestamps = new SortedSet<long>(dateTimes.Select(convertDateTimeToTimestamp));
Or wrapping it up in an extension method:
namespace System.Linq
{
public static class CustomLinqExtensions
{
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source);
}
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source, IComparer<TSource> comparer)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source, comparer);
}
}
}
Then you can simply call dateTimes.Select(convertDateTimeToTimestamp).ToSortedSet();
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
2
What about using the constructor overload that takes IEnumerable<T>?:
timestamps = new SortedSet<long>(dateTimes.Select(convertDateTimeToTimestamp));
Or wrapping it up in an extension method:
namespace System.Linq
{
public static class CustomLinqExtensions
{
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source);
}
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source, IComparer<TSource> comparer)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source, comparer);
}
}
}
Then you can simply call dateTimes.Select(convertDateTimeToTimestamp).ToSortedSet();
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
add a comment |
2
What about using the constructor overload that takes IEnumerable<T>?:
timestamps = new SortedSet<long>(dateTimes.Select(convertDateTimeToTimestamp));
Or wrapping it up in an extension method:
namespace System.Linq
{
public static class CustomLinqExtensions
{
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source);
}
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source, IComparer<TSource> comparer)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source, comparer);
}
}
}
Then you can simply call dateTimes.Select(convertDateTimeToTimestamp).ToSortedSet();
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
add a comment |
2
2
2
What about using the constructor overload that takes IEnumerable<T>?:
timestamps = new SortedSet<long>(dateTimes.Select(convertDateTimeToTimestamp));
Or wrapping it up in an extension method:
namespace System.Linq
{
public static class CustomLinqExtensions
{
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source);
}
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source, IComparer<TSource> comparer)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source, comparer);
}
}
}
Then you can simply call dateTimes.Select(convertDateTimeToTimestamp).ToSortedSet();
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
What about using the constructor overload that takes IEnumerable<T>?:
timestamps = new SortedSet<long>(dateTimes.Select(convertDateTimeToTimestamp));
Or wrapping it up in an extension method:
namespace System.Linq
{
public static class CustomLinqExtensions
{
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source);
}
public static SortedSet<TSource> ToSortedSet<TSource>(this IEnumerable<TSource> source, IComparer<TSource> comparer)
{
if (source == null) throw new ArgumentNullException(nameof(source));
return new SortedSet<TSource>(source, comparer);
}
}
}
Then you can simply call dateTimes.Select(convertDateTimeToTimestamp).ToSortedSet();
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
edited Nov 14 '18 at 0:55
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
answered Nov 14 '18 at 0:50
JohnJohn
12k32038
12k32038
add a comment |
add a comment |
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There is a
.ToHashSet()method, but not a.ToSortedSet()method.– John
Nov 14 '18 at 1:00
@John Ahh, thank you. Is there a reason why there would not be a
.ToSortedSet()?– Jon
Nov 14 '18 at 1:04
On looking more closely, it seems that
.ToHashSet()doesn't exist in .NET Framework, but does in .NET Core and presumably .NET Standard. It seems like a new addition. Maybe they will add more in future.– John
Nov 14 '18 at 1:06
2
@Jon: The reason why there is not a feature you want is always the same: No one implemented that feature. In order for you to use a feature, someone has to implement it. You didn't implement it, and no one else did either. Why didn't you implement it?
– Eric Lippert
Nov 14 '18 at 1:30
@EricLippert To be frank, I am surprised .NET went for
ToList()instead of genericToCollection<T>() where T: ICollection<T>method.– Joker_vD
Nov 14 '18 at 7:13