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Best way to check if object exists in Entity Framework?
...t.Employees.Any()) Then ' Check if there are "any" records in the Employee table
Dim employee = From c In context.Employees Select c.PayrollNumber ' Select just the PayrollNumber column to work with
For Each item As Object In employee ' Loop through each employee in the Employees ent...
Select multiple records based on list of Id's with linq
I have a list containing Id's of my UserProfile table. How can i select all UserProfiles based on the list of Id's i got in a var using LINQ ?
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When should I really use noexcept?
...of overhead"… No, this should be implemented by not generating exception tables for such a function, which the exception dispatcher should catch and then bail out.
– Potatoswatter
May 29 '12 at 8:55
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What does “hashable” mean in Python?
... data structures use the hash value internally.
All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all compare unequal, and their hash value...
How do I catch a PHP fatal (`E_ERROR`) error?
...ace = print_r( debug_backtrace( false ), true );
$content = "
<table>
<thead><th>Item</th><th>Description</th></thead>
<tbody>
<tr>
<th>Error</th>
<td><pre&...
Change a Rails application to production
...and start the migration with rake db:migrate. Make certain that a database table exists, even if you plan on adding tables later (this is also part of step 1).
RAILS_ENV=production rake secret - this will create a secret_key that you can add to config/secrets.yml . You can copy/paste this into confi...
MVC (Laravel) where to add logic
...E.g., whenever someone publishes a post I also want to save something to a table for analytics. Maybe not the best example but in general there's a lot of this "grouped" functionality.
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Get the IP address of the machine
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I like jjvainio's answer. As Zan Lnyx says, it uses the local routing table to find the IP address of the ethernet interface that would be used for a connection to a specific external host. By using a connected UDP socket, you can get the information without actually sending any packets. The ap...
Data structure for loaded dice?
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I'm thinking of granulating your table.
Instead of having a table with the cumulative for each die value, you could create an integer array of length xN, where x is ideally a high number to increase accuracy of the probability.
Populate this array using th...
Rich vs Anemic Domain Model [closed]
...e to fetch the Order, Customer, Loyalty Program, Marketing Campaign, Taxes Table from the DB. Consider also, a Customer has a collection of Orders, a Loyalty Program has a collection of Customers and so forth. If we naively fetch all of these, we'll end up loading the whole DB in RAM. This isn't via...