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Cocoa Core Data efficient way to count entities
...ty")
let count = context.countForFetchRequest(fetchRequest, error: nil)
I tested this in the simulator with a 400,000+ object count and the result was fairly fast (though not instantaneous).
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How to paste yanked text into the Vim command line
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Yup, works in Linux too. Tested under GNOME in both Vim and GVim.
– Teoulas
Oct 27 '11 at 9:26
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Animate change of view controllers without using navigation controller stack, subviews or modal cont
...n].bounds];, but I've only used this on the very newest version of iOS, so test carefully.
– Phil Calvin
Aug 9 '12 at 21:18
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Everyauth vs Passport.js?
...mber of benefits, including smaller overall code size and well defined and testable interfaces.
For a basic illustration, compare the difference between running $ npm install passport and $ npm install everyauth. Passport lets you craft your application using only the dependencies you actually nee...
How do I use NSTimer?
...ncy.
adding one to hour component works just fine, no need for a midnight test (link)
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edited May 23 '17 at 12:32
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Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin
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/* I have done it this way, and also tested it */
Step 1 = Register custom cell class (in case of prototype cell in table) or nib (in case of custom nib for custom cell) for table like this in viewDidLoad method:
[self.yourTableView registerClass:[CustomTableV...
Advantage of creating a generic repository vs. specific repository for each object?
... and letting folks play w/ the UI and do integration & user acceptance testing in parallel. Then, as I find I need specific queries on the repo, etc, I start replacing that dependency w/ the specific one if needed and going from there. One underlying impl. is easy to create and use (and possib...
Pandas aggregate count distinct
... already given, the solution using the string "nunique" seems much faster, tested here on ~21M rows dataframe, then grouped to ~2M
%time _=g.agg({"id": lambda x: x.nunique()})
CPU times: user 3min 3s, sys: 2.94 s, total: 3min 6s
Wall time: 3min 20s
%time _=g.agg({"id": pd.Series.nunique})
CPU tim...
Preventing console window from closing on Visual Studio C/C++ Console application
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I just tested this in VS2017 and VS2019. It requires both setting the subsystem to CONSOLE and turning this option off. Having one or the other or neither closes the window automatically.
– Casey
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Resharper- Find all unused classes
...ally be sure unless every time you remove the unused class you run all the tests inside your application [every possible layer] to be 80% sure you are safe. Moral of the story : a class might sound unused to Resharper but it might be resurrected when you use Dependency Injection.
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