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Entity Framework .Remove() vs. .DeleteObject()
...ild to the parent in the database allows NULL values, this foreign will be set to null and if you call SaveChanges this NULL value for the childEntity will be written to the database (i.e. the relationship between the two is removed). This happens with a SQL UPDATE statement. No DELETE statement occ...
git remote add with other SSH port
...rk for me. I needed ssh:// from the beggining.
# does not work
git remote set-url origin user@example.com:10000/aaa/bbbb/ccc.git
# work
git remote set-url origin ssh://user@example.com:10000/aaa/bbbb/ccc.git
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What is the difference between List (of T) and Collection(of T)?
... index)
Enumerable has no order. You cannot add or remove items from the set. You cannot even get a count of items in the set. It strictly lets you access each item in the set, one after the other.
Collection is a modifiable set. You can add and remove objects from the set, you can also get the c...
How to create and handle composite primary key in JPA
...mn(name = "ColumnA")
private String columnA;
/** Your getters and setters **/
}
@Embeddable
public class MyKey implements Serializable {
@Column(name = "Id", nullable = false)
private int id;
@Column(name = "Version", nullable = false)
private int version;
/** get...
How to enable assembly bind failure logging (Fusion) in .NET
...lues to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Fusion
Add:
DWORD ForceLog set value to 1
DWORD LogFailures set value to 1
DWORD LogResourceBinds set value to 1
DWORD EnableLog set value to 1
String LogPath set value to folder for logs (e.g. C:\FusionLog\)
Make sure you include the backslash after...
Replace specific characters within strings
...
Regular expressions are your friends:
R> ## also adds missing ')' and sets column name
R> group<-data.frame(group=c("12357e", "12575e", "197e18", "e18947")) )
R> group
group
1 12357e
2 12575e
3 197e18
4 e18947
Now use gsub() with the simplest possible replacement pattern: empty s...
Unicode, UTF, ASCII, ANSI format differences
...laces, it means UTF-8. Properly, Unicode refers to the abstract character set itself, not to any particular encoding.
UTF-16: 2 bytes per "code unit". This is the native format of strings in .NET, and generally in Windows and Java. Values outside the Basic Multilingual Plane (BMP) are encoded as su...
Get the real width and height of an image with JavaScript? (in Safari/Chrome)
...
Webkit browsers set the height and width property after the image is loaded. Instead of using timeouts, I'd recommend using an image's onload event. Here's a quick example:
var img = $("img")[0]; // Get my img elem
var pic_real_width, pic...
How do I prevent the iPhone screen from dimming or turning off while my application is running?
...
Objective-C
[[UIApplication sharedApplication] setIdleTimerDisabled:YES];
Swift
UIApplication.shared.isIdleTimerDisabled = true
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How to convert an entire MySQL database characterset and collation to UTF-8?
How can I convert entire MySQL database character-set to UTF-8 and collation to UTF-8?
19 Answers
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