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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...it's worth noting that the problem essentially only arises because, historically, a lot of dbms have been quite poor when it comes to handling joins (MySQL being a particularly noteworthy example). So n+1 has, often, been notably faster than a join. And then there are ways to improve on n+1 but stil...
Hosting a Maven repository on github
...solution I've been able to find consists of these steps:
Create a branch called mvn-repo to host your maven artifacts.
Use the github site-maven-plugin to push your artifacts to github.
Configure maven to use your remote mvn-repo as a maven repository.
There are several benefits to using this ap...
How to programmatically set the layout_align_parent_right attribute of a Button in Relative Layout?
I have a relative layout which I am creating programmatically:
4 Answers
4
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Clearing using jQuery
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Easy: you wrap a <form> around the element, call reset on the form, then remove the form using .unwrap(). Unlike the .clone() solutions otherwise in this thread, you end up with the same element at the end (including custom properties that were set on it).
Tested and w...
Could not find an implementation of the query pattern
...nection using LINQ.
First I add a new LINQ to SQL class, and drag my table called "tblPersoon" into it.
9 Answers
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Overloading and overriding
... idea.
Let's say there is a Vehicle washing machine and it has a function called as "Wash" and accepts Car as a type.
Gets the Car input and washes the Car.
public void Wash(Car anyCar){
//wash the car
}
Let's overload Wash() function
Overloading:
public void Wash(Truck anyTruck){
...
Why this line xmlns:android=“http://schemas.android.com/apk/res/android” must be the first in the la
...ou do:
<LinearLayout android:id>
</LinearLayout>
Instead of calling android:id, the xml will use http://schemas.android.com/apk/res/android:id to be unique. Generally this page doesn't exist (it's a URI, not a URL), but sometimes it is a URL that explains the used namespace.
The name...
HTML5 dragleave fired when hovering a child element
...e whole idea is to store the evenet.target in ondrageenter everytime it is called on any of the parent or child elements. Then in ondragleave check if the current target (event.target) is equal to the object you stored in ondragenter.
The only case these two are matched is when your drag is leaving...
What is href=“#” and why is it used?
...main use of anchor tags - <a></a> - is as hyperlinks. That basically means that they take you somewhere. Hyperlinks require the href property, because it specifies a location.
Hash:
A hash - # within a hyperlink specifies an html element id to which the window should be scrolled.
hr...
How to do something before on submit? [closed]
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Why is this wrapped in an empty function call? Shouldn't the submit function be able to bind directly to the $('#form') without the surrounding empty function? EDIT: the docs suggest that the surrounding function call is not needed.
– eykanal
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