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Spring MVC: How to perform validation?
...User :
public class User {
private String name;
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}
Method 1 : If you have Spring 3.x+ and simple validation to do, use javax.validation.constraints annotations (also known as JSR-303 annotations).
public class User {
@NotNull
private String name;
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}
You will nee...
How to implement a unique index on two columns in rails
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1 Answer
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How can I change the copyright template in Xcode 4?
...r-project basis.
If you select the project in the Project Navigator (Cmd-1) and open the File Inspector (Cmd-Opt-1), you'll see a field for "Organization" under "Project Document".
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What is the difference between origin and upstream on GitHub?
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1 Answer
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Bootstrap dropdown sub menu missing
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Updated 2018
The dropdown-submenu has been removed in Bootstrap 3 RC. In the words of Bootstrap author Mark Otto..
"Submenus just don't have much of a place on the web right now, especially the mobile web. They will be removed wit...
Adding :default => true to boolean in existing Rails column
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change_column is a method of ActiveRecord::Migration, so you can't call it like that in the con...
Is there a python equivalent of Ruby's 'rvm'?
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edited Feb 16 '16 at 11:28
answered May 11 '10 at 16:27
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Java 8 Stream and operation on arrays
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edited May 23 '17 at 12:18
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answered Jun 24 '14 at 15:57
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Force Intellij IDEA to reread all maven dependencies
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12 Answers
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Why does sys.exit() not exit when called inside a thread in Python?
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sys.exit() raises the SystemExit exception, as does thread.exit(). So, when sys.exit() raises th...