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Quickly reading very large tables as dataframes
...quickly reading CSV files.
Trying to store as much data as you can in databases rather than flat files. (As well as being a better permanent storage medium, data is passed to and from R in a binary format, which is faster.) read.csv.sql in the sqldf package, as described in JD Long's answer, impor...
How do I select a random value from an enumeration?
...afe and will start returning zeroes when it breaks. I've updated my answer based on this info.
– WHol
Aug 4 '15 at 15:23
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JavaScript: Create and save file [duplicate]
...e in
browsers that do not natively support it.
Also have a look at the demo here:
http://eligrey.com/demos/FileSaver.js/
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How to install Java 8 on Mac
...k install java on my El Capitan Mac and it's downloading jdk-8u112-macosx-x64.dmg.
– Calrion
Oct 24 '16 at 0:43
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Java Security: Illegal key size or default parameters?
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@JamesBlack - Yep, and to make sure all the bases were covered I put the JAR's under Java/jre/lib/security, Java/jdk/lib/security, and Java/jdk/jre/lib/security. Running 'java -version' returns the expected details.
– aroth
Oct 2...
What is the Swift equivalent to Objective-C's “@synchronized”?
...ct inside of swift for this yet.
I did make up this small helper function based on some of the code I've seen from Matt Bridges and others.
func synced(_ lock: Any, closure: () -> ()) {
objc_sync_enter(lock)
closure()
objc_sync_exit(lock)
}
Usage is pretty straight forward
synced...
Validating IPv4 addresses with regexp
...course, formatted for readability purposes on 3 separate lines)
Debuggex Demo
It may not be optimised for speed, but works well when only looking for 'real' internet addresses.
Things that will (and should) fail:
0.1.2.3 (0.0.0.0/8 is reserved for some broadcasts)
10.1.2.3 (10.0....
Turn off Visual Studio Attach security warning when debugging IIS
...maWiebe Tijsma
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Getting a list of all subdirectories in the current directory
...xample as a (Windows)Path object.
The first element of os.walk will be the base folder. So you will not get only subdirectories. You can use fu.pop(0) to remove it.
None of the results will use natural sorting. This means results will be sorted like this: 1, 10, 2. To get natural sorting (1, 2, 10),...
PHP Multidimensional Array Searching (Find key by specific value)
...
Another poossible solution is based on the array_search() function. You need to use PHP 5.5.0 or higher.
Example
$userdb=Array
(
(0) => Array
(
(uid) => '100',
(name) => 'Sandra Shush',
(url) => 'urlof100'
),...