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Difference between natural join and inner join
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What are transparent comparators?
...upports calling it with heterogeneous types (e.g. the pointer_comp type in https://stackoverflow.com/a/18940595/981959 is not transparent according to STL's definition, but defining pointer_comp::is_transparent allows it to be used to solve the problem). If you only ever lookup in your std::set<T...
Get second child using jQuery
..., see the jsPerf scores on a <ul> list with 50 <li> children:
http://jsperf.com/second-child-selector
The $(t).first().next() method is the fastest here, by far.
But, on the other hand, if you take the <tr> node and find the <td> children and and run the same test, the res...
What size should apple-touch-icon.png be for iPad and iPhone?
... same
57 x 57 px default
76 x 76 px for iPads without retina
Source:
https://developer.apple.com/ios/human-interface-guidelines/icons-and-images/app-icon/
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What does iterator->second mean?
...eUploader: {
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Why is my git repository so big?
...ded a bunch of video files to my repo, and had to reset --soft HEAD^ and recommit. The .git/objects dir was huge after that, and this was the only way that got it back down. However I didn't like the way the one liner changed my branch names around (it showed origin/branchname instead of just branch...
Java: getMinutes and getHours
... appropriate constant like HOUR_OF_DAY or so to read the values you need.
http://java.sun.com/javase/6/docs/api/java/util/Calendar.html
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How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
In Firefox 3, the answer is 6 per domain: as soon as a 7th XmlHttpRequest (on any tab) to the same domain is fired, it is queued until one of the other 6 finish.
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Store output of subprocess.Popen call in a string
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subprocess.Popen: http://docs.python.org/2/library/subprocess.html#subprocess.Popen
import subprocess
command = "ntpq -p" # the shell command
process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=None, shell=True)
#Launch the ...
How to perform file system scanning
... interface for walking file paths has changed as of weekly.2011-09-16, see http://groups.google.com/group/golang-nuts/msg/e304dd9cf196a218. The code below will not work for release versions of GO in the near future.
There's actually a function in the standard lib just for this: filepath.Walk.
pac...