¡@
c# Programming Glossary: expressionWhat are the correct version numbers for C#? http://stackoverflow.com/questions/247621/what-are-the-correct-version-numbers-for-c 3.5 and VS2008 November 2007 . Major new features lambda expressions extension methods expression trees anonymous types implicit.. . Major new features lambda expressions extension methods expression trees anonymous types implicit typing var query expressions.. expression trees anonymous types implicit typing var query expressions C# 4.0 released with .NET 4 and VS2010 April 2010 . Major new..
Why does one often see “null != variable” instead of “variable != null” in C#? http://stackoverflow.com/questions/271561/why-does-one-often-see-null-variable-instead-of-variable-null-in-c more readable code as an if statement requires a Boolean expression to start with and the type of x 5 is Int32 not Boolean . I suggest..
Is there a string math evaluator in .NET? http://stackoverflow.com/questions/355062/is-there-a-string-math-evaluator-in-net evaluator in .NET If I have a string with a valid math expression such as String s 1 2 7 Is there a built in library function.. library function in .NET that will parse and evaluate that expression for me and return the result In this case 15. c# .net share.. Control Library COM and use code like this to evaluate an expression. Also works for JScript. Dim sc As New MSScriptControl.ScriptControl..
Performance differences between debug and release builds http://stackoverflow.com/questions/4043821/performance-differences-between-debug-and-release-builds by the loop can be moved out of the loop. Common sub expression elimination. x y 4 z y 4 becomes z x Constant folding. x 1 2..
Dynamic LINQ OrderBy on IEnumerable<T> http://stackoverflow.com/questions/41244/dynamic-linq-orderby-on-ienumerablet although note that dynamic only applies to LINQ to Objects expression trees for ORMs etc can't really represent dynamic queries MemberExpression..
How do I make a textbox that only accepts numbers? http://stackoverflow.com/questions/463299/how-do-i-make-a-textbox-that-only-accepts-numbers general solution that could work with perhaps a regular expression or depend on the values of other controls. Ideally this would..
Retrieving Property name from lambda expression http://stackoverflow.com/questions/671968/retrieving-property-name-from-lambda-expression Property name from lambda expression Is there a better way to get the Property name when passed.. way to get the Property name when passed in via a lambda expression Here is what i currently have. eg. GetSortingInfo User u u.UserId.. User u u.UserId It worked by casting it as a memberexpression only when the property was a string. because not all properties..
Using C# regular expressions to remove HTML tags [duplicate] http://stackoverflow.com/questions/787932/using-c-sharp-regular-expressions-to-remove-html-tags C# regular expressions to remove HTML tags duplicate This question already has an.. contained tags 36 answers How do I use C# regular expression to replace remove all HTML tags including the angle brackets.. As often stated before you should not use regular expressions to process XML or HTML documents. They do not perform very..
Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate] http://stackoverflow.com/questions/858080/nullable-types-and-the-ternary-operator-why-is-10-null-forbidden However the compiler complains Error 1 Type of conditional expression cannot be determined because there is no implicit conversion.. The compiler first tries to evaluate the right hand expression GetBoolValue 10 null The 10 is an int literal not int and null.. two hence the error message. If you change the right hand expression to one of the following then it compiles because there is an..
C# Lambda expression, why should I use this? http://stackoverflow.com/questions/167343/c-sharp-lambda-expression-why-should-i-use-this I use this I have quickly read the Microsoft Lambda Expression documentation. I see example that have help me to understand.. to the function or creating one time use objects. Expression trees are a very powerful new feature of C# 3.0 that allow an.. An API just has to make a delegate parameter into an Expression T parameter and the compiler will generate an expression tree..
http://stackoverflow.com/questions/19132/expression-versus-statement Versus Statement I'm asking with regards to c# but I assume.. expression statement share improve this question Expression Something which evaluates to a value. Example 1 2 x Statement..
LINQ - Fluent and Query Expression - Is there any benefit(s) of one over other? [closed] http://stackoverflow.com/questions/214500/linq-fluent-and-query-expression-is-there-any-benefits-of-one-over-other Fluent and Query Expression Is there any benefit s of one over other closed LINQ is one..
Dynamic LINQ OrderBy on IEnumerable<T> http://stackoverflow.com/questions/41244/dynamic-linq-orderby-on-ienumerablet that go via AsQueryable but the code below is the core Expression logic needed. public static IOrderedQueryable T OrderBy T this.. props property.Split '.' Type type typeof T ParameterExpression arg Expression.Parameter type x Expression expr arg foreach.. '.' Type type typeof T ParameterExpression arg Expression.Parameter type x Expression expr arg foreach string prop in..
How do parameterized queries help against SQL injection? http://stackoverflow.com/questions/5468425/how-do-parameterized-queries-help-against-sql-injection then is it the same Also here I would use Regular Expression validation to stop insertion of illegal characters. c# .net..
Convert generic List/Enumerable to DataTable? http://stackoverflow.com/questions/564366/convert-generic-list-enumerable-to-datatable or if you need quicker HyperDescriptor in 2.0 or maybe Expression in 3.5. Actually HyperDescriptor should be more than adequate...
Retrieving Property name from lambda expression http://stackoverflow.com/questions/671968/retrieving-property-name-from-lambda-expression static RouteValueDictionary GetInfo T this HtmlHelper html Expression Func T object action where T class var expression GetMemberInfo.. return GetInfo html name private static MemberExpression GetMemberInfo Expression method LambdaExpression lambda method.. html name private static MemberExpression GetMemberInfo Expression method LambdaExpression lambda method as LambdaExpression if..
Why would you use Expression<Func<T>> rather than Func<T>? http://stackoverflow.com/questions/793571/why-would-you-use-expressionfunct-rather-than-funct would you use Expression Func T rather than Func T I understand lambdas and the Func.. stump me. In what circumstances would you use an Expression Func T rather than a plain old Func T c# delegates lambda expression.. to server rather than executing the lambda . Conceptually Expression Func T is completely different from Func T . Func T denotes..
Visualizing an AST created with ANTLR (in a .Net environment) http://stackoverflow.com/questions/2856612/visualizing-an-ast-created-with-antlr-in-a-net-environment an AST grammar ASTDemo options output AST tokens ROOT EXPRESSION parse expression ' ' ^ ROOT expression omit the semi colon expression.. ^ ROOT expression omit the semi colon expression addExp ^ EXPRESSION addExp addExp multExp ' '^ multExp ' '^ multExp multExp powerExp.. arrowsize .5 color black style bold n0 label ROOT n1 label EXPRESSION n1 label EXPRESSION n2 label n2 label n3 label 12 n4 label EXPRESSION..
|