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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
I'm having a bit of a strange problem. I'm trying to add a foreign key to one table that references another, but it is failing for some reason. With my limited knowledge of MySQL, the only thing that could possibly be suspect is that there is a foreign key on a different table referencing the one I ...
How do you set the Content-Type header for an HttpClient request?
I'm trying to set the Content-Type header of an HttpClient object as required by an API I am calling.
14 Answers
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How to get instance variables in Python?
Is there a built-in method in Python to get an array of all a class' instance variables? For example, if I have this code:
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How can I split a string into segments of n characters?
As the title says, I've got a string and I want to split into segments of n characters.
12 Answers
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Xcode source automatic formatting
As a C# developer, I have become highly dependent on the automatic formatting in Visual Studio 2008. Specifically, I will use the CTRL + K , D keyboard shortcut to force things back into shape after my sloppy implementation.
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What is the difference between List (of T) and Collection(of T)?
I've seen them used in a lot of the same ways, and I am worried I'm about to go down a path in design that is irreversible if I don't understand this better. Also, I am using .NET.
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Is it possible to register a http+domain-based URL Scheme for iPhone apps, like YouTube and Maps?
I'd like to have iOS to open URLs from my domain (e.g. http://martijnthe.nl ) with my app whenever the app is installed on the phone, and with Mobile Safari in case it is not.
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What does a tilde do when it precedes an expression?
I saw it in an answer, and I've never seen it before.
5 Answers
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Listening for variable changes in JavaScript
Is it possible to have an event in JS that fires when the value of a certain variable changes? JQuery is accepted.
21 Answe...
How do I use Maven through a proxy?
I want to share my experience of using maven through a proxy.
17 Answers
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