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PostgreSQL: Difference between text and varchar (character varying)
...s, and over varchar – because it has distinct name
The article does detailed testing to show that the performance of inserts and selects for all 4 data types are similar. It also takes a detailed look at alternate ways on constraining the length when needed. Function based constraints or doma...
JPA: How to have one-to-many relation of the same Entity type
...e entity on each end of the relationship is the same. The general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Lo...
Polymorphism with gson
...hus discouraged by the Gson dev team. code.google.com/p/google-gson/issues/detail?id=340#c2
– Programmer Bruce
Apr 1 '13 at 4:58
4
...
How to prevent page scrolling when scrolling a DIV element?
...( e ) {
var e0 = e.originalEvent,
delta = e0.wheelDelta || -e0.detail;
this.scrollTop += ( delta < 0 ? 1 : -1 ) * 30;
e.preventDefault();
});
Live demo: https://jsbin.com/howojuq/edit?js,output
So you manually set the scroll position and then just prevent the default behav...
JSON.net: how to deserialize without using the default constructor?
...]
public Result(int? code, string format, Dictionary<string, string> details = null)
{
...
}
It is important that the constructor parameter names match the corresponding property names of the JSON object (ignoring case) for this to work correctly. You do not necessarily have to have a c...
difference between socket programming and Http programming
...
True, but that's the details OP will discover himself along with other 95% information on this topic.
– Anri
Feb 27 '13 at 9:59
...
Android webview launches browser when calling loadurl
...State) {
View rootView = inflater.inflate(R.layout.fragment_webpage_detail, container, false);
// Show the dummy content as text in a TextView.
if (mItem != null) {
/* Method : 1
This following line is working fine BUT when we click the menu item then it opens...
Using a custom typeface in Android
... the fonts for each view you instantiate: code.google.com/p/android/issues/detail?id=9904 A way to fix this is to create a globally-accessible static hashmap of all instantiated fonts: code.google.com/p/android/issues/detail?id=9904#c7
– Ken Van Hoeylandt
Apr 2...
How do I download a tarball from GitHub using cURL?
... (60) SSL certificate problem: unable to get local issuer certificate More details here: curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle".. If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option.
...
What is the difference between include and extend in Ruby?
...ing the included method. This is very prominent in legacy Rails code. more details from Yehuda Katz.
Further details about include, with its default behavior, assuming you've run the following code
class Klazz
include Mod
end
If Mod is already included in Klazz, or one of its ancestors, the ...