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Best way to implement Enums with Core Data
...to assign a type property to the entity? In other words, I have an entity called Item with an itemType property that I want to be bound to an enum, what is the best way of going about this.
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How to convert Nonetype to int or string?
I've got an Nonetype value x , it's generally a number, but could be None . I want to divide it by a number, but Python raises:
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Abort Ajax requests using jQuery
...1.5 the returned object is a wrapper for the native XMLHttpRequest object called jqXHR. This object appears to expose all of the native properties and methods so the above example still works. See The jqXHR Object (jQuery API documentation).
UPDATE 2:
As of jQuery 3, the ajax method now returns a p...
List of foreign keys and the tables they reference
...key is described in the columns r_owner and r_constraint_name of the table ALL_CONSTRAINTS. This will give you the info you want:
SELECT a.table_name, a.column_name, a.constraint_name, c.owner,
-- referenced pk
c.r_owner, c_pk.table_name r_table_name, c_pk.constraint_name r_pk
FROM...
Should I return EXIT_SUCCESS or 0 from main()?
...y portable way to indicate failure in a C or C++ program. exit(1) can actually signal successful termination on VMS, for example.
If you're going to be using EXIT_FAILURE when your program fails, then you might as well use EXIT_SUCCESS when it succeeds, just for the sake of symmetry.
On the other...
How do I print a double value without scientific notation using Java?
... but it showed dexp: 12345681.000000 which is wrong value.And actually after then I want to display it on my web page where it display like this 1.2345678E7.Is there anyway through which i can store it in any double like 12345678 and any other way?
– Despicable
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Response.Redirect to new window
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Dude, this is fantastic solution that actually works! Thank you.
– Klaus Nji
Nov 14 '14 at 21:31
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Example for boost shared_mutex (multiple reads/one write)?
I have a multithreaded app that has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updat...
System.Data.SQLite Close() not releasing database file
...em a while ago while writing a DB abstraction layer for C# and I never actually got around to finding out what the issue was. I just ended up throwing an exception when you attempted to delete a SQLite DB using my library.
Anyway, this afternoon I was looking through it all again and figured I woul...
How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
...;
Notes:
Set the 'src' last, to guarantee that your onload handler is called on all platforms, even if the image is already in the cache.
Wrap changes to stuff like globalAlpha between a save and restore (in fact use them lots), to make sure you don't clobber settings from elsewhere, particularl...