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ActiveRecord: size vs count
...ve built but haven't saved, .count will report only the count from the database.
– Shawn J. Goff
Sep 6 '13 at 18:54
...
Difference between is and as keyword
...sages of both the keywords, you will get the difference easily.
C# Code:
BaseClass baseclassInstance = new DerivedClass();
DerivedClass derivedclassInstance;
if (baseclassInstance is DerivedClass)
{
derivedclassInstance = (DerivedClass)baseclassInstance;
// do something on derivedclassInsta...
How to dynamic new Anonymous Class?
...ynamicTypeBuilderTest
{
///
/// Create instance based on any Source class as example based on PersonalData
///
public static object CreateAnonymousDynamicInstance(PersonalData personalData, Type dynamicType, List<ClassDescriptorKeyValue> classDescript...
Validate that a string is a positive integer
...
Two answers for you:
Based on parsing
Regular expression
Note that in both cases, I've interpreted "positive integer" to include 0, even though 0 is not positive. I include notes if you want to disallow 0.
Based on Parsing
If you want it to b...
What is the best way to stop people hacking the PHP-based highscore table of a Flash game
...d with the shared secret. This salt value should be stored in a local database of pending queries, and should have a timestamp associated with it so that it can "expire" after perhaps one minute.
The flash game combines the salt value with the shared secret and calculates a hash to verify that this...
Docker - how can I copy a file from an image to a host?
...
docker cp $(docker create --rm registry.example.com/ansible-base:latest):/home/ansible/.ssh/id_rsa ./hacked_ssh_key
wanted to supply a one line solution based on pure docker functionality (no bash needed)
edit: container does not even has to be run in this solution
edit2: thanks to @...
Value cannot be null. Parameter name: source
...ed here and mistakenly a table was there that has been delete from the database recently and I never noticed and it returning null with other entities. I just removed the stupid table from the include list and I am good to go. hope this can help somebody.
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Create a date from day month and year with T-SQL
...ill raise an error if the date is invalid - my main objection to a DATEADD-based solution to this problem):
http://msdn.microsoft.com/en-us/library/hh213228.aspx
DATEFROMPARTS(ycolumn, mcolumn, dcolumn)
or
DATEFROMPARTS(@y, @m, @d)
...
What file uses .md extension and how should I edit them?
... an editor, I suggest you use http://dillinger.io/. It is a simple browser-based text editor that can render Markdown on the fly.
However, if you prefer an app, and you are using OS X, you could try Mou. It is quite good and full of examples.
...
Flags to enable thorough and verbose g++ warnings
... to validate numbers that you get from,
say, a network connection or a database that you do not have absolute
control over. Exceptions or returning early are the best way to
handle that (but still require you to have a default case!).
-Werror is an important one for me. When compiling large amounts ...