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How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
...based iPhone app. I'm not sure how to proceed. The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array-based ...
Using .NET, how can you find the mime type of a file based on the file signature not the extension
...I'm testing. I've been changing the extension of the CSV (to .png, .jpeg, etc) and the mimetype changes with the extension (image/png, image/jpeg). I could be wrong, but it was my understanding that Urlmon.dll determined the mimetype using the file's metadata, not just it's extension
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How do you validate a URL with a regular expression in Python?
...+ '-.') # and others?
assert pieces.scheme in ['http', 'https', 'ftp'] # etc.
It might be slower, and maybe you'll miss conditions, but it seems (to me) a lot easier to read and debug than a regular expression for URLs.
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How do function pointers in C work?
...multiple versions of some functions to take advantage of SSE, popcnt, AVX, etc. At startup, set your function pointers to the best version of each function for the current CPU. In your other code, just call through the function pointer instead of having conditional branches on the CPU features eve...
Difference Between One-to-Many, Many-to-One and Many-to-Many?
...s an engineering decision that trades off memory, processing, performance, etc.
What can be confusing is that a Many-To-Many Bidirectional relationship does not need to be symmetric! That is, a bunch of People could point to a skill, but the skill need not relate back to just those people. Typica...
Why not use tables for layout in HTML? [closed]
...aster pages or user controls in .net, include files in php or classic asp, etc ... Anybody who copies the company layout like this deserves an a** kicking! ;-)
– John MacIntyre
May 20 '09 at 14:30
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What GRANT USAGE ON SCHEMA exactly do?
...-- SKIP THIS PART UNTIL POSTGRES JDBC ADDS SCRAM - START ----------//
cd /etc/postgresql/$VERSION/main
sudo cp pg_hba.conf pg_hba.conf_bak
sudo -e pg_hba.conf
# change all `md5` with `scram-sha-256`
# save and exit
//------------ SKIP THIS PART UNTIL POSTGRES JDBC ADDS SCRAM - END -----------//
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What's the fastest way to merge/join data.frames in R?
..." case depending on the relative sizes of the tables, multiplicity of keys etc. (that's why I said I'm not sure if my example is representative). Nonetheless, it's nice to see all the different solutions to the problem.
– datasmurf
Dec 1 '10 at 23:27
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Evenly distributing n points on a sphere
...say, taken from only a half of the unit square cut diagonally or so and stretched around to get a circle.
Notes
Those “bars” are formed by rational approximations to a number, and the best rational approximations to a number come from its continued fraction expression, z + 1/(n_1 + 1/(n_2 + 1/(...
What is the difference between compile and link function in angularjs
...scope information, you can't call functions defined on the instance scope, etc.
However, the compile function (like the link function) does have access to the attributes. So if your DOM manipulations don't require the instance scope, you can use a compile function. Here's an example of a directive...