大约有 23,000 项符合查询结果（耗时：0.0471秒） [XML]
Difference between Destroy and Delete
... API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is simply removed with an SQL DELETE statement on the record's primary key, a...
Django Cookies, how can I set them?
I have a web site which shows different content based on a location
the visitor chooses. e.g: User enters in 55812 as the zip. I know what
city and area lat/long. that is and give them their content pertinent
to that area. My question is how can I store this in a cookie so that
when they return they...
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
...
View the change history of a file using Git versioning
...
If you prefer to stay text-based, you may want to use tig.
Quick Install:
apt-get: # apt-get install tig
Homebrew (OS X): $ brew install tig
Use it to view history on a single file: tig [filename]
Or browse detailed repo history: tig
Similar to...
WPF vs Silverlight [duplicate]
...form that has access to the full .Net Framework. Silverlight is a browser-based technology that has access to a subset of the .Net Framework (called the CoreCLR). So, you'll notice differences using seemingly every day methods and objects within the framework. For instance, the Split() method on ...
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...
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...
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...
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 ...