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The relationship could not be changed because one or more of the foreign-key properties is non-nulla
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You should delete old child items thisParent.ChildItems one by one manually. Entity Framework doesn't do that for you. It finally cannot decide what you want to do with the old child items - if you want to throw them away or if you want to keep and assign them to other parent enti...
How to check if mysql database exists
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First one good. Second one not so much. You might not have database creation privilege.
– O. Jones
Dec 16 '09 at 20:18
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Django: How to manage development and production settings?
..., "shared settings" file), and use DJANGO_SETTINGS_MODULE to control which one to use.
Here's how:
As noted in the Django documentation:
The value of DJANGO_SETTINGS_MODULE should be in Python path syntax, e.g. mysite.settings. Note that the settings module should be on the Python import searc...
How to convert PascalCase to pascal_case?
...A sequence beginning with an uppercase letter can be followed by either:
one or more uppercase letters and digits (followed by either the end of the string or an uppercase letter followed by a lowercase letter or digit ie the start of the next sequence); or
one or more lowercase letters or digits....
What does axis in pandas mean?
... numpy.mean usage when axis is specified explicitly (in numpy.mean, axis==None by default, which computes the mean value over the flattened array) , in which axis=0 along the rows (namely, index in pandas), and axis=1 along the columns. For added clarity, one may choose to specify axis='index' (inst...
Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
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One sentence answer: <<no matter how many layers would behave just like a single perceptron (because linear functions added together just give you a linear function).>>. Nice!
– Autonomous
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Xml configuration versus Annotation based configuration [closed]
...been working on lately it seems to become increasingly important to choose one or the other (XML or Annotation). As projects grow, consistency is very important for maintainability.
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What's your favorite “programmer” cartoon?
Personally I like this one:
135 Answers
135
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Split string, convert ToList() in one line
I have a string that has numbers
10 Answers
10
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How can I make grep print the lines below and above each matching line? [duplicate]
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grep's -A 1 option will give you one line after; -B 1 will give you one line before; and -C 1 combines both to give you one line both before and after, -1 does the same.
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