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c# Programming Glossary: sumPerformance surprise with “as” and nullable types http://stackoverflow.com/questions/1583050/performance-surprise-with-as-and-nullable-types I've included a sample test app below which basically sums all the integers within an object array but the array contains.. object values Stopwatch sw Stopwatch.StartNew int sum 0 foreach object o in values if o is int int x int o sum.. 0 foreach object o in values if o is int int x int o sum x sw.Stop Console.WriteLine Cast 0 1 sum long sw.ElapsedMilliseconds..
When should I use a List vs a LinkedList http://stackoverflow.com/questions/169973/when-should-i-use-a-list-vs-a-linkedlist 12345678 i var a new Temp i i i i list.AddLast a decimal sum 0 foreach var item in list sum item.A List 2.4 seconds List.. i i list.AddLast a decimal sum 0 foreach var item in list sum item.A List 2.4 seconds List Temp list new List Temp 2.4 seconds.. 0 i 12345678 i var a new Temp i i i i list.Add a decimal sum 0 foreach var item in list sum item.A Even if you only access..
Is there any significant difference between using if/else and switch-case in C#? http://stackoverflow.com/questions/395618/is-there-any-significant-difference-between-using-if-else-and-switch-case-in-c faster than comparing to each string constant in IFs. To sum it up if number of conditions is more than 5 or so prefer SWITCH..
Integer summing blues, short += short problem http://stackoverflow.com/questions/4343624/integer-summing-blues-short-short-problem summing blues short short problem Program in C# short a b a 10.. of course 9845 if this calculation is done in shorts. The sum is larger than the largest possible short so it wraps around..
Replace parameter in lambda expression http://stackoverflow.com/questions/11159697/replace-parameter-in-lambda-expression an expression passed to a Linq extension method such as Sum into one expression per item in the enumeration since these.. new Foo foes.Add new Foo Expression Func int exp2 foes.Sum f f.a f.a f.b string result2 GetResult exp2 should get v_001..
Get sum of two columns in one LINQ query http://stackoverflow.com/questions/2432281/get-sum-of-two-columns-in-one-linq-query int Total int I can do it by two queries int total m.Items.Sum p p.Total int done m.Items.Sum p p.Done But I'd like to do it.. queries int total m.Items.Sum p p.Total int done m.Items.Sum p p.Done But I'd like to do it in one query something like this.. something like this var x from p in m.Items select new Sum p.Total Sum p.Done Surely there is a way to call aggregate functions..
Standard deviation of generic list? [duplicate] http://stackoverflow.com/questions/3141692/standard-deviation-of-generic-list Compute the Average double avg values.Average Perform the Sum of value avg _2_2 double sum values.Sum d Math.Pow d avg 2 Put.. Perform the Sum of value avg _2_2 double sum values.Sum d Math.Pow d avg 2 Put it all together ret Math.Sqrt sum values.Count..
Project Euler: Problem 1 (Possible refactorings and run time optimizations) http://stackoverflow.com/questions/3374622/project-euler-problem-1-possible-refactorings-and-run-time-optimizations counter sum counter counter Console.WriteLine Total Sum 0 sum Console.ReadKey private static bool DivisibleByThreeOrFive.. 0 1000 .Where counter counter 3 0 counter 5 0 .Sum Console.WriteLine total Console.ReadKey share improve this..
Am I misunderstanding LINQ to SQL .AsEnumerable()? http://stackoverflow.com/questions/3389855/am-i-misunderstanding-linq-to-sql-asenumerable int recordCount query.Count int totalSomeNumber query.Sum decimal average query.Average Assume query takes a very long.. using LINQ to SQL then use LINQ to Objects for the Count Sum and Average . Instead when I do this in LINQPad I see the same..
http://stackoverflow.com/questions/478968/sum-of-digits-in-c-sharp of digits in C# What's the fastest and easiest to read implementation..
How to calculate the sum of the datatable column in asp.net? http://stackoverflow.com/questions/5892993/how-to-calculate-the-sum-of-the-datatable-column-in-asp-net object variable. object sumObject sumObject table.Compute Sum Amount Display the result in your Total Amount Label like so..
C# Async Sockets Server Receive Problems http://stackoverflow.com/questions/5934469/c-sharp-async-sockets-server-receive-problems csharp csharp cs_network sockets article.php c8781#Client1 Sum up I am using async Sockets ala BeginAccept .. BeginReceive..
The cast to value type 'Int32' failed because the materialized value is null http://stackoverflow.com/questions/6864311/the-cast-to-value-type-int32-failed-because-the-materialized-value-is-null type. when CreditHistory table has no records. var creditsSum from u in context.User join ch in context.CreditHistory on.. equals ch.UserID where u.ID userID select ch.Amount .Sum How can I modify the query to accept null values c# .net entity.. unexpected nulls in different places. ...DefaultIfEmpty 0 .Sum 0 can help in this quite simple case where there might be no..
http://stackoverflow.com/questions/6970070/linq-lambda-group-by-with-sum Lambda Group By with Sum Hi I can do this in method syntax but I'm trying to improve.. jnum .Select b new b.job_group_quota .Sum c# linq share improve this question A general example query..
http://stackoverflow.com/questions/7478387/dynamic-and-performance of magnitude. EDIT Code I have played with internal class Sum2 public int intSum internal class Sum public dynamic DynSum.. Code I have played with internal class Sum2 public int intSum internal class Sum public dynamic DynSum public int intSum class.. with internal class Sum2 public int intSum internal class Sum public dynamic DynSum public int intSum class Program private..
http://stackoverflow.com/questions/1069677/pivot-table-in-c-sharp VALUES 1992 4 2.4 GO SELECT FROM Pivot GO SELECT Year SUM CASE Quarter WHEN 1 THEN Amount ELSE 0 END AS Q1 SUM CASE Quarter.. Year SUM CASE Quarter WHEN 1 THEN Amount ELSE 0 END AS Q1 SUM CASE Quarter WHEN 2 THEN Amount ELSE 0 END AS Q2 SUM CASE Quarter.. AS Q1 SUM CASE Quarter WHEN 2 THEN Amount ELSE 0 END AS Q2 SUM CASE Quarter WHEN 3 THEN Amount ELSE 0 END AS Q3 SUM CASE Quarter..
Multiple group by and Sum LINQ http://stackoverflow.com/questions/1541030/multiple-group-by-and-sum-linq 05 09 25 09 soap 06 09 25 09 pills 15 I need to make the SUM of each MONTH so the final table would look like this saleDate..
How to query excel file in C# using a detailed query http://stackoverflow.com/questions/207693/how-to-query-excel-file-in-c-sharp-using-a-detailed-query make the query string like this... Select columnA columnB SUM columnG from Accounts group by columnA columnB ..so that it..
LINQ: Using INNER JOIN, Group and SUM http://stackoverflow.com/questions/530925/linq-using-inner-join-group-and-sum Using INNER JOIN Group and SUM I am trying to perform the following SQL using LINQ and the.. to the stack team for help. SELECT T1.Column1 T1.Column2 SUM T3.Column1 AS Amount FROM T1 INNER JOIN T2 ON T1.T1ID T2.T1ID..
The cast to value type 'Int32' failed because the materialized value is null http://stackoverflow.com/questions/6864311/the-cast-to-value-type-int32-failed-because-the-materialized-value-is-null simple case where there might be no elements and sql's SUM returns null whereas c# expect 0. A more general approach is..
http://stackoverflow.com/questions/6970070/linq-lambda-group-by-with-sum I'm trying to improve my lambda skills how can I do SELECT SUM job_group_quota as 'SUM' FROM dbo . tbl_job_session WHERE job_group_job_number.. lambda skills how can I do SELECT SUM job_group_quota as 'SUM' FROM dbo . tbl_job_session WHERE job_group_job_number @jobnum..
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