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Assignment inside lambda expression in Python
I have a list of objects and I want to remove all objects that are empty except for one, using filter and a lambda expression.
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What does the [Flags] Enum Attribute mean in C#?
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The [Flags] attribute should be used whenever the enumerable represents a collection of possible values, rather than a single value. Such collections are often used with bitwise operators, for example:
var allowedColors = MyColor.Red | MyCol...
How to declare a friend assembly?
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You need to sign both assemblies, because effectively both assemblies reference each other.
You have to put the public key in the InternalsVisibleTo attribute. For example, in Protocol Buffers I use:
[assembly:InternalsVisibleTo("Google.Pro...
Determine if a sequence contains all elements of another sequence using Linq [duplicate]
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Count? How about Not Any?
bool contained = !subset.Except(superset).Any();
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LINQ Join with Multiple Conditions in On Clause
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You just need to name the anonymous property the same on both sides
on new { t1.ProjectID, SecondProperty = true } equals
new { t2.ProjectID, SecondProperty = t2.Completed } into j1
Based on the comments of @svick, here is another implementation that might make more sense:
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ASP.NET MVC: No parameterless constructor defined for this object
I was following Steven Sanderson's ' Pro ASP.NET MVC Framework ' book. On page 132, in accordance with the author's recommendation, I downloaded the ASP.NET MVC Futures assembly, and added it to my MVC project. [Note: This could be a red herring.]
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Optional Parameters with C++ Macros
...etting optional parameters with C++ Macros? Some sort of overloading would be nice too.
14 Answers
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Loop through an array in JavaScript
In Java you can use a for loop to traverse objects in an array as follows:
40 Answers
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SCOPE_IDENTITY() for GUIDs?
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You can get the GUID back by using OUTPUT. This works when you're inserting multiple records also.
CREATE TABLE dbo.GuidPk (
ColGuid uniqueidentifier NOT NULL DEFAULT NewSequentialID(),
Col2 int NOT NULL
)
GO
DECLARE @op...
Select rows of a matrix that meet a condition
...a frame using as.data.frame(). In that case the previous answers (using subset or m$three) will work, otherwise they will not.
To perform the operation on a matrix, you can define a column by name:
m[m[, "three"] == 11,]
Or by number:
m[m[,3] == 11,]
Note that if only one row matches, the re...