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Questions tagged [expression]

Combination of several programming symbols and values intending to produce a result

An expression is code before it gets evaluated. That is, evaluating an expression will give you a result.

Expressions can consists of combinations of variables, constants, operators, function calls, or whatever constructs are available in that language.

Many s have an expression data type, and an evaluation function (often called eval), where calling eval(an_expression) will calculate a result.

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Generic Expression Filter

Hi I am hoping someone might be able to provide a little guidance with the following: I am trying to create a Generic Expression Filter that uses reflection and can receive a set of rules and create a valid expression for restricting the data…
SCB
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PHP Preg expression to remove html tags and inner contents from string?

quick question. I'd like to remove the sup tag from the following string, and all content within it. $string = "Priority Mail® International"; How would I do that?
Braydon Batungbacal
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*** Exception: Prelude.read: no parse in Haskell - Parsing, Expressions and Recursion

This portion of code should read in two or more numbers (main io function omitted), then a "+" to give the sum. Rationals are used because later i will do multiplications and such other operations. data Expression = Number Rational |…
CSJC
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Implementation of Expression.Assign in .Net 3.5 with same signature?

Expression.Assign isn't available before .NET 4. I need to implementation under .NET 3.5 of this method with original signature: public static BinaryExpression Assign( Expression left, Expression right ) Clarification: I'm not looking for a…
AndreyAkinshin
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Regular expressions that removes only first "/"

I'm new to Regular expressions and can't seem to find out how I have to solve this: I need a regular expressions that "allows" only numbers, letters and /. I wrote this: /[^a-zA-Z0-9/]/g I think it's possible to strip the first / off, but don't…
Ronald
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Using Expression to call a property and object and determine if the object is null or not

I want to be able to call properties on objects that might be null but not explicitly have to check whether they are null or not when calling. Like this: var something = someObjectThatMightBeNull.Property; My idea is to create a method that takes…
Mikael Östberg
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Is there a way to do SSRS Expressions in C#

I am working on a SQl Server Report Services project and the report I am creating requires some custom code. It seems that all expressions must be in VB.NET and I figured if there was an 'easy' way to switch that over to be C#, it would be…
JasonRShaver
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Converting from Expression> to Expression>

I could use some help with expression conversion. I have a method on a class which looks like the following: protected IQueryOver OrderQuery( Expression> orderBy) { return…
Adam Goss
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Embedded CASE with expressions in SQL Server 2008

Hi SQL SVR 2008 gurus. As a SQL newbie, I'm hoping for some direction.I've got a SELECT statement that needs to check an expression against a field value for each worker to see if they qualify for a paid lunch break. The value of the number of…
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Magento collection expression

How to use expressions in a collection. More specific, I want to SELECT CAST(qty_shipped AS UNSIGNED). I have tried something like this: addExpressionFieldToSelect('qty_shipped','CAST(qty_shipped AS UNSIGNED)',null) , but it appends the table name…
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Creating a mathematical expression from nested loops

Can anyone show me how to create a mathematical expression for the number of time the statement total++; will run in the following code? I understand that the 'i loop' will iterate n/P times and I know that total++; will run a total of 'i loop…
erebel55
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How to create the function using Expression linq

I have the following class public class ProdutoTipo : IAuditable { public Guid ID { get; set; } public string Nome { get; set; } public string MiniNome { get; set; } public string Descricao { get; set; } public string Link {…
ridermansb
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Combining select expressions of the same input type

Say, I have these properties which are overridden in a derived class. protected virtual Expression> GetIDExpr { get; } protected virtual Expression> GetNameExpr { get; } protected virtual…
Connell
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Get property value from MemberExpression

I'm attempting to retrieve the value of a property from an instance of MemberExpression. Here is what I have so far: protected override void VisitMember(Context context, MemberExpression node) { var propertyInfo = node.Member as…
Chuck Conway
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Receiving error BC30201: Expression expected

Catch ex As Exception GetTTCFTPini = {"Nothing"} End Try it says at the GetTTCFTPini = {"Nothing"} error BC30201: Expression expected.
Epicblood
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