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Copy values from one column to another in the same table
...MITER $$
CREATE PROCEDURE copyTo()
BEGIN
DECLARE x INT;
DECLARE str varchar(45);
SET x = 1;
set str = '';
WHILE x < 5 DO
set str = (select source_col from emp where id=x);
update emp set targe...
What is the purpose of the reader monad?
...ify your program to deal with multiple currencies. You need to be able to convert between currencies on the fly. Your first attempt is to define a top level function
type CurrencyDict = Map CurrencyName Dollars
currencyDict :: CurrencyDict
to get spot prices. You can then call this dictionary i...
Localization of DisplayNameAttribute
...rceKey))
{
}
}
with the code to look up the resource:
internal static string LookupResource(Type resourceManagerProvider, string resourceKey)
{
foreach (PropertyInfo staticProperty in resourceManagerProvider.GetProperties(BindingFlags.Static | BindingFlags.NonPublic))
...
What causes java.lang.IncompatibleClassChangeError?
...al field become static,
Non-constant field become non-static,
Class become interface,
Interface become class,
if you add a new field to class/interface (or add new super-class/super-interface) then a static field from a super-interface of a client class C may hide an added field (with the same name)...
Split a string on whitespace in Go?
... := "one two three four "
words := strings.Fields(someString)
fmt.Println(words, len(words)) // [one two three four] 4
DEMO: http://play.golang.org/p/et97S90cIH
From the docs:
func Fields(s string) []string
Fields splits the string s around each instance of one or more consecutive white spa...
Should I pass a shared_ptr by reference? [duplicate]
...
In controlled circumstances you can pass the shared pointer by constant reference. Be sure that nobody is concurrently deleting the object, though this shouldn't be too hard if you're careful about to whom you give references.
In general, you should pass the shared pointer as a...
Does JavaScript guarantee object property order?
...
The behavior of integer keys isn't consistent across all browsers. Some older browsers iterate integer keys in insertion order (with the string keys) and some in ascending order.
– Dave Dopson
Dec 29 '1...
How to make layout with rounded corners..?
...awable {
private final BitmapShader bitmapShader;
private final Paint p;
private final RectF rect;
private final float borderRadius;
public RoundedCornersDrawable(final Resources resources, final Bitmap bitmap, final float borderRadius) {
super(resources, bitmap);
...
Cannot set some HTTP headers when using System.Net.WebRequest
...
"I feel it's important to point out that this restriction is a feature of the .NET Framework" -- I'd rather do not have this kind of feature.
– Herberth Amaral
Mar 12 '15 at 15:14
...
Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...中添加Repository，Controller通过该类来访问Mongo DB。
public interface IContactRepository {
IEnumerable GetAllContacts();
Contact GetContact(string id);
Contact AddContact(Contact item);
bool RemoveContact(string id);
bool UpdateContact...