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How to make Entity Framework Data Context Readonly
...nly querying capabilities of DbContext. Let's say you have an entity named Order, then you would use ReadOnlyDataContext instance in a way like below.
readOnlyDataContext.Set<Order>().Where(q=> q.Status==OrderStatus.Delivered).ToArray();
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can't push to branch after rebase
... branch to the latest commit on the target, and unstashing your changes in order on top.
(This explains why you may get multiple conflict resolution prompts when doing a rebase vs the one conflict resolution you may get with a merge. You have the opportunity to resolve a conflict on EACH commit th...
Why use the yield keyword, when I could just use an ordinary IEnumerable?
... and you would like to see the first handful (5) records of the year.
In order to accomplish this, the list must be sorted ascending by date, and then have the first 5 taken. If this was done without yield, the entire list would have to be sorted, right up to making sure the last two dates were in...
Android: why is there no maxHeight for a View?
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In order to create a ScrollView or ListView with a maxHeight you just need to create a Transparent LinearLayout around it with a height of what you want the maxHeight to be. You then set the ScrollView's Height to wrap_content. ...
Enable 'xp_cmdshell' SQL Server
...iguration settings for show advanced options and xp_cmdshell to 1, in that order.
Adding to this, if you want to preserve the previous values, you can read them from sys.configurations first, then apply them in reverse order at the end. We can also avoid unnecessary reconfigure calls:
declare @pr...
Why does one often see “null != variable” instead of “variable != null” in C#?
In c#, is there any difference in the excecution speed for the order in which you state the condition?
9 Answers
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Quicksort: Choosing the pivot
...ment in our class, getting the k smallest elements from an array in sorted order. We generated random arrays then used either a min-heap, or randomized select and fixed pivot quicksort and counted the number of comparisons. On this "random" data, the second solution performed worse on average than...
C++ sorting and keeping track of indexes
...ly the standard library, I want to sort a sequence of samples in ascending order, but I also want to remember the original indexes of the new samples.
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What is a Java ClassLoader?
...echanisms. This is evident by the recent change of J2SE 1.5 to J2SE 5.0 in order to reflect the maturity of the Java platform.
As of JDK 1.2, a bootstrap class loader that is built into the JVM is responsible for loading the classes of the Java runtime. This class loader only loads classes that are...
How to add a new method to a php object on the fly?
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Using simply __call in order to allow adding new methods at runtime has the major drawback that those methods cannot use the $this instance reference.
Everything work great, till the added methods don't use $this in the code.
class AnObj extends s...