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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...
Sublime as default editor
Is there a way to set Sublime Text as the default text editor for file formats on Windows 7?
10 Answers
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Why does changing the returned variable in a finally block not change the return value?
... Yep. The same is true with any mutable return value (StringBuilder, List, Set, ad nauseum): if you change the contents in the finally block, then those changes are seen in the calling code when the method finally exits.
– Ted Hopp
Jul 2 '13 at 6:14
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Replace specific characters within strings
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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...
What's the best way to store Phone number in Django models
...orget to add the region. Without PHONENUMBER_DEFAULT_REGION = 'US' in the settings it won't allow you to input anything users from the United States would recognize as a phone number. Even then, this package won't output as something that looks like a phone number . . . I'm sure there's a setting ...
Get the real width and height of an image with JavaScript? (in Safari/Chrome)
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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...
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...
S3 - Access-Control-Allow-Origin Header
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I had to set <AllowedHeader>*</AllowedHeader> for it to work (better to make a new rule for your site only when doing this)
– parliament
Feb 18 '15 at 4:38
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How do you add multi-line text to a UIButton?
...tleLabel.textAlignment = NSTextAlignmentCenter; // if you want to
[button setTitle: @"Line1\nLine2" forState: UIControlStateNormal];
For iOS 5 and below use the following to allow multiple lines:
button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
// you probably want to center it
button....
How do I prevent the iPhone screen from dimming or turning off while my application is running?
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Objective-C
[[UIApplication sharedApplication] setIdleTimerDisabled:YES];
Swift
UIApplication.shared.isIdleTimerDisabled = true
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