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JPA getSingleResult() or null
...w an exception. Actually since you're not doing a primary key lookup technically there could be multiple results (even if one, both or the combination of your foreign keys or constraints makes this impossible in practice) so this is probably the more appropriate solution.
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Getting the HTTP Referrer in ASP.NET
...k look with reflector shows that UrlReferrer does a lot more than a simple call to ServerVariables("HTTP_REFERER")
– Diadistis
Nov 23 '10 at 16:42
13
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How to convert a char to a String?
...u can use Character.toString(char). Note that this method simply returns a call to String.valueOf(char), which also works.
As others have noted, string concatenation works as a shortcut as well:
String s = "" + 's';
But this compiles down to:
String s = new StringBuilder().append("").append('s'...
/usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found
...have been avoiding this issue in the past by simply linking libstdc++ statically with this parameter sent to g++ when linking my executable:
-static-libstdc++
If linking in the library statically is an option this is probably the quickest work-around.
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AngularJS- Login and Authentication in each route and controller
...login from the login page. It will handle the login form. The form have to call a submit method which is part of your loginController. This method will update (if the form is correct and the user have to be logged in) the state of the user USING the Auth service I described.
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How to calculate the running time of my program? [duplicate]
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What is happening between the two calls to nanoTime has absolutely no impact.
– krtek
Aug 18 '15 at 12:06
10
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Java abstract interface
... you, though.
Other things you can explicitly state, but don't need to:
call super() on the first line of a constructor
extends Object
implement inherited interfaces
Is there other rules that applies with an abstract interface?
An interface is already "abstract". Applying that keyword agai...
What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?
...tries to load
in the definition of a class (as part
of a normal method call or as part of
creating a new instance using the new
expression) and no definition of the
class could be found.
The searched-for class definition
existed when the currently executing
class was compiled, but...
Getting a random value from a JavaScript array
... @SapphireSun this is correct. Note the Math.floor(Math.random(...)) call, which rounds down.
– ashes999
Jan 19 '14 at 12:43
34
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When should the volatile keyword be used in C#?
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edited Feb 23 at 4:48
Callum Watkins
2,22222 gold badges2323 silver badges4040 bronze badges
answered Jul 8 '13 at 15:34
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