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conditional unique constraint
...ur CHECK constraint relies on a query and if more than one row is affected by any update. What happens is that the constraint gets checked once for each row before the statement completes. That means statement atomicity is broken and the function will be exposed to the database in an inconsistent st...
What is ViewModel in MVC?
... from domain models in that view models only contain the data (represented by properties) that you want to use on your view. For example, lets say that you want to add a new employee record, your view model might look like this:
public class CreateEmployeeViewModel
{
public string FirstName {...
How do I use Linq to obtain a unique list of properties from a list of objects?
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
How to decorate a class?
...recurse infinitely, because the name Foo is bound to the subclass returned by the decorator, not the original class (which is not accessible by any name). Python 3's argumentless super() avoids this issue (I assume via the same compiler magic that allows it to work at all). You can also work around ...
How to pass an object from one activity to another on Android
...lizable is a standard Java interface. You simply mark a class Serializable by implenting the interface, and Java will automatically serialize it in certain situations. Parcelable is an Android specific interface where you implement the serialization yourself. It was created to be far more efficien...
Nested attributes unpermitted parameters
...ibutes: [:id, :name, :category])
Some more details can be found in the Ruby edge API docs and strong_parameters on github or here
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jQuery or CSS selector to select all IDs that start with some string [duplicate]
...ivs then target that class. You'll lose the additional specificity offered by ID selectors anyway, as attribute selectors share the same specificity as class selectors. Plus, just using a class makes things much simpler.
sha...
print memory address of Python variable [duplicate]
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@BlackVegetable: What do you mean by "vanilla" if not CPython?
– abarnert
May 6 '13 at 22:56
2
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JSTL in JSF2 Facelets… makes sense?
...t;/ui:repeat>
...already ends up as-is in the JSF component tree whereby the very same <h:outputText> component is during view render time being reused to generate HTML output based on current iteration round:
<span id="items:0:item">value1</span>
<span id="items:1:item"&g...
Input text dialog Android
...lare global Context, Context cont; and then, replace "this" in alertdialog by cont. AlertDialog.Builder builder = new AlertDialog.Builder(cont); final EditText input = new EditText(cont);
– user2891317
Oct 17 '13 at 16:06
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