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Make sure that the controller has a parameterless public constructor error
...r all root types explicitly.
But of course, the configuration error comes from you adding the second constructor to your DbContext. Unity always tries to pick the constructor with the most arguments, but it has no idea how to resolve this particular constructor.
So the real cause is that you are t...
Hidden Features of Java
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The more recent versions of Visual VM, from JDK 1.6.0_22 and later, are much improved. I would bet JDK1.7 has an even better version of it.
– djangofan
Aug 24 '11 at 20:40
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unique object identifier in javascript
...hold strong references to the objects you pass into it. This prevents them from being garbage collected and is a major memory leak
– Downgoat
Aug 18 at 8:35
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Rails 4: how to use $(document).ready() with turbo-links
... instead of "page:load", as the former is fired whether the page is loaded from the server or from client-side cache.
– Nathan Long
Apr 28 '15 at 14:22
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Inputting a default image in case the src attribute of an html is not valid?
...ebsite for compatibility. This element is widely supported by all browsers from IE6+.
* Unless the URL for the image changed (again), in which case you'll probably see the alt text.
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How to get UTC timestamp in Ruby?
... purposes or storing the timestamp in a database, you can readily get that from the object. But that depends very much on your intended use.
Saying that »a true timestamp is the number of seconds since the Unix epoch« is a little missing the point, as that is one way of representing a point in ti...
What are the Dangers of Method Swizzling in Objective-C?
...even realise the swizzle has been preformed. If there are bugs introduced from the swizzle (perhaps dues to changes in the original class) they will be hard to resolve.
In summary, you should keep swizzling to a minimum and consider how changes in the original class might effect your swizzle. Al...
Developing for Android in Eclipse: R.java not regenerating
.... I find that often I change a string and forget to change the string name from AndroidManifest.xml.
Check that Android SDK Build-tools is installed. Window -> Android SDK Manager -> Tools -> Android SDK Build-tools
Make sure when you update the Android SDK Tools, you also update the Androi...
Re-ordering columns in pandas dataframe based on column name [duplicate]
...be removed in a future version. Use '.reindex' instead. This is separate from the ipykernel package so we can avoid doing imports until
– CodingMatters
May 8 '18 at 8:27
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In a django model custom save() method, how should you identify a new object?
...te.adding is True creating
self._state.adding is False updating
I got it from this page
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