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JSR-303 @Valid annotation not working for list of child objects
... addresses member of UserAddressesForm with @Valid annotation. See section 3.1.3 and 3.5.1 of JSR 303: Bean Validation. As I explained in my answer to the question Is there a standard way to enable JSR 303 Bean Validation using annotated method, this is the real use of @Valid annotation as per JSR 3...
How do I interpret precision and scale of a number in a database?
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3 Answers
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How do I retrieve the number of columns in a Pandas data frame?
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312
Like so:
import pandas as pd
df = pd.DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": ...
Difference Between Invoke and DynamicInvoke
...alidated. For example:
Func<int,int> twice = x => x * 2;
int i = 3;
int j = twice.Invoke(i);
// or just:
int j = twice(i);
However! If you just know that it is Delegate, it has to resolve the parameters etc manually - this might involve unboxing, etc - a lot of reflection is going on. Fo...
Postgres: “ERROR: cached plan must not change result type”
This exception is being thrown by the PostgreSQL 8.3.7 server to my application.
Does anyone know what this error means and what I can do about it?
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Convert list to tuple in Python
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843
It should work fine. Don't use tuple, list or other special names as a variable name. It's proba...
ASP.NET MVC Controller Naming Pluralization
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Is there any difference between __DIR__ and dirname(__FILE__) in PHP?
... the same output :
string '/home/squale/developpement/tests/temp' (length=37)
But, there are at least two differences :
__DIR__ only exists with PHP >= 5.3
which is why dirname(__FILE__) is more widely used
__DIR__ is evaluated at compile-time, while dirname(__FILE__) means a function-ca...
Design for Facebook authentication in an iOS app that also accesses a secured web service
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n00bProgrammer
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answered Jan 7 '11 at 13:40
Dan RayDan Ray
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