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The relationship could not be changed because one or more of the foreign-key properties is non-nulla
...inalChildItem);
}
_dbContext.SaveChanges();
}
Note: This is not tested. It's assuming that the child item collection is of type ICollection. (I usually have IList and then the code looks a bit different.) I've also stripped away all repository abstractions to keep it simple.
I don't know...
Accessing a Shared File (UNC) From a Remote, Non-Trusted Domain With Credentials
... the user name and password to use the current credentials. I will do some testing to see if this works.
– flipdoubt
Oct 23 '09 at 19:27
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WCF - How to Increase Message Size Quota
...
If you're still getting this error message while using the WCF Test Client, it's because the client has a separate MaxBufferSize setting.
To correct the issue:
Right-Click on the Config File node at the bottom of the tree
Select Edit with SvcConfigEditor
A list of editable sett...
Capture HTML Canvas as gif/jpg/png/pdf?
...avigate to an image with a green square in the middle of it, but I haven't tested.
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Numpy: find first index of value fast
...ay. Y-axis is the time to find it.
The array had 1 million elements and tests were run 100 times. Results still fluctuate a bit, but the qualitative trend is clear: Python and f2py quit at the first element so they scale differently. Python gets too slow if the needle is not in the first 1%, wher...
Which is faster in Python: x**.5 or math.sqrt(x)?
...= 123" "math.sqrt(x)"
1000000 loops, best of 3: 0.727 usec per loop
This test shows that x**.5 is slightly faster than sqrt(x).
For the Python 3.0 the result is the opposite:
$ \Python30\python -mtimeit -s"from math import sqrt; x = 123" "x**.5"
1000000 loops, best of 3: 0.803 usec per loop
$ \...
What is the copy-and-swap idiom?
...arked sequentially in the code as (n).
The first is the self-assignment test. This check serves two purposes: it's an easy way to prevent us from running needless code on self-assignment, and it protects us from subtle bugs (such as deleting the array only to try and copy it). But in all other ca...
Test whether string is a valid integer
...here. I'm extremely surprised none of the answers mention the simplest, fastest, most portable solution; the case statement.
case ${variable#[-+]} in
*[!0-9]* | '') echo Not a number ;;
* ) echo Valid number ;;
esac
The trimming of any sign before the comparison feels like a bit of a hack, bu...
How can I measure the speed of code written in PHP? [closed]
... and averaging the time and (b) using separate files for each thing you're testing. If you have several timings within one script, their order can make a difference sometimes.
– DisgruntledGoat
Jul 29 '09 at 16:48
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How are POST and GET variables handled in Python?
...that the CGI module doesn't work well. Consider this HTTP request:
POST / test.py?user_id=6
user_name=Bob&age=30
Using CGI.FieldStorage().getvalue('user_id') will cause a null pointer exception because the module blindly checks the POST data, ignoring the fact that a POST request can carry G...