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iphone Core Data Unresolved error while saving
...itical 'userInfo' keys.
Here's a version of the method I've been using. ('_sharedManagedObjectContext' is a #define for '[[[UIApplication sharedApplication] delegate] managedObjectContext]'.)
- (BOOL)saveData {
NSError *error;
if (![_sharedManagedObjectContext save:&error]) {
/...
Why does installing Nokogiri on Mac OS fail with libiconv is missing?
...official solution from the Nokogiri docs (nokogiri.org/tutorials/installing_nokogiri.html#mac_os_x), and the only one that worked on El Capitan. The accepted solution did not work there.
– Johannes
Oct 17 '15 at 20:11
...
When is -XAllowAmbiguousTypes appropriate?
... Foo a where
whichOne :: a -> String
instance Foo a where
whichOne _ = "a"
instance Foo [a] where
whichOne _ = "[a]"
-- |
-- >>> main
-- [a]
main :: IO ()
main = putStrLn $ whichOne (undefined :: [Int])
But GHC is not okay with overlapping instances when neither is clearly a b...
Setting Objects to Null/Nothing after use in .NET
...e sure you call IDisposable.Dispose() when you're done with that object (wrapped in a try..finally, or, a using() block). But even if you don't remember to call Dispose(), the finaliser method on the object should be calling Dispose() for you.
I thought this was a good treatment:
Digging into I...
On Duplicate Key Update same as insert
... g=g;
To get the id from LAST_INSERT_ID; you need to specify the backend app you're using for the same.
For LuaSQL, a conn:getlastautoid() fetches the value.
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ContextLoaderListener or not?
A standard spring web application (created by Roo or "Spring MVC Project" Template) create a web.xml with ContextLoaderListener and DispatcherServlet . Why do they not only use the DispatcherServlet and make it to load the complete configuration?
...
How to get a Static property with Reflection
...ties is:
obj.GetType.GetProperty(propName, Reflection.BindingFlags.Public _
Or Reflection.BindingFlags.Static Or Reflection.BindingFlags.Instance Or _
Reflection.BindingFlags.FlattenHierarchy)
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JavaFX Application Icon
...class.getResourceAsStream( "icon.png" ))); works.
– k_o_
Feb 13 '16 at 0:19
3
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How to specify data attributes in razor, e.g., data-externalid=“23151” on @this.Html.CheckBoxFor(…)
...el.MyBoolProperty,
new {
@class = "myCheckBox",
data_externalid = "23521"
}
)
The _ will automatically be converted to - in the resulting markup:
<input type="checkbox" name="MyModel.MyBoolProperty" data-externalid="23521" class="myCheckBox" />
And that's true f...
Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...re readable.
Using the sample data provided:
>>> %timeit df3.reset_index().drop_duplicates(subset='index', keep='first').set_index('index')
1000 loops, best of 3: 1.54 ms per loop
>>> %timeit df3.groupby(df3.index).first()
1000 loops, best of 3: 580 µs per loop
>>> %tim...