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The Role Manager feature has not been enabled
...
If you got here because you're using the new ASP.NET Identity UserManager, what you're actually looking for is the RoleManager:
var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(new ApplicationDbContext()));
roleManager will ...
implements Closeable or implements AutoCloseable
...d do this in a finally block:
PrintWriter pw = null;
try {
File file = new File("C:\\test.txt");
pw = new PrintWriter(file);
} catch (IOException e) {
System.out.println("bad things happen");
} finally {
if (pw != null) {
try {
pw.close();
} catch (IOException e) {
...
PHP PDO: charset, set names?
... you're running an older version of PHP, you must do it like this:
$dbh = new PDO("mysql:$connstr", $user, $password);
$dbh->exec("set names utf8");
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Find the division remainder of a number
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From Python 3.7, there is a new math.remainder() function:
from math import remainder
print(remainder(26,7))
Output:
-2.0 # not 5
Note, as above, it's not the same as %.
Quoting the documentation:
math.remainder(x, y)
Return the IEEE 754-style remai...
How do I change the background color of the ActionBar of an ActionBarActivity using XML?
...
Try this
ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable("COLOR"));
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What is the purpose of fork()?
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fork() is how you create new processes in Unix. When you call fork, you're creating a copy of your own process that has its own address space. This allows multiple tasks to run independently of one another as though they each had the full memory of...
Sequence contains no elements?
... and found that, for some reason, the ID and date are being passed as null\new(0000-0000) from the edit page. The page is strongly typed as BlogPost. On the edit page, I only have text boxes for the title and content, the ID and date aren't put on the page at all. Could this be the reason for it pa...
Making a mocked method return an argument that was passed to it
...= mock(Application.class);
when(mock.myFunction(anyString())).thenAnswer(new Answer<String>() {
@Override
public String answer(InvocationOnMock invocation) throws Throwable {
Object[] args = invocation.getArguments();
return (String) args[0];
}
});
assertEquals("...
High Quality Image Scaling Library [closed]
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/// </summary>
private static object encodersLock = new object();
/// <summary>
/// A quick lookup for getting image encoders
/// </summary>
public static Dictionary<string, ImageCodecInfo> Encoders
{
//get...
try {} without catch {} possible in JavaScript?
... Opera 53 and Safari 11.1.
The syntax is shown below:
try {
throw new Error("This won't show anything");
} catch { };
You still need a catch block, but it can be empty and you don't need to pass any variable. If you don't want a catch block at all, you can use the try/finally, but n...