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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
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To be honest I don't know how to check the content of the validation errors. Visual Studio shows me that it's an array with 8 objects, so 8 validation errors.
Actually you should see the errors if you drill into that array in Visu...
Code Golf: Lasers
...e, the tr is written in the form y''' which allows me to skip backslashing one backslash.
die "true\n" if />x/; die "false\n" if />#/;
Terminate with the right message if we hit the target or a wall.
$s = $1 if s/>(.)/$s$d{$1}/;
If there's an empty space in front of the laser, move fo...
LEFT JOIN only first row
...t way. I always tried to join both on the same level instead of making the one depended from the other. Thank you very much for leading me on the right track. Edited the first post
– KddC
Mar 25 '13 at 23:39
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Will Try / Finally (without the Catch) bubble the exception?
...an exception, of course, in which case that will effectively "replace" the one that was originally thrown.
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Navigation in django
I've just done my first little webapp in django and I love it. I'm about to start on converting an old production PHP site into django and as part its template, there is a navigation bar.
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Objective-C pass block as parameter
...red the same way function pointer types are, but replacing the * with a ^. One way to pass a block to a method is as follows:
- (void)iterateWidgets:(void (^)(id, int))iteratorBlock;
But as you can see, that's messy. You can instead use a typedef to make block types cleaner:
typedef void (^ Iter...
When to use RSpec let()?
... means that if you fat finger the spelling of the instance variable, a new one will be created and initialized to nil, which can lead to subtle bugs and false positives. Since let creates a method, you'll get a NameError when you misspell it, which I find preferable. It makes it easier to refactor...
How can Perl's print add a newline by default?
... Isn't it safe to assume that unless Perl 6 is specifically mentioned that the question refers to Perl 5?
– wobbily_col
Nov 22 '17 at 12:18
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ExecutorService that interrupts tasks after a timeout
...he cancel is a no op and work continues unchanged. There only needs to be one extra thread scheudling to cancel the tasks and one thread to run them. You could have two executors, one to submit your main tasks and one to cancel them.
– John Vint
May 3 '10 at ...
Is Java Regex Thread Safe?
...t contains the source code for the public classes in the java package") so one can take a quick peek oneself.
– David Tonhofer
Nov 18 '13 at 15:40
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