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What's the magic of “-” (a dash) in command-line parameters?
...command, every time you change directory, it stores the directory you came from. If you do cd with the special - "directory name", it uses that remembered directory instead of a real one. You can easily switch between two directories quite quickly by using that.
Other commands may treat - as a diff...
Task continuation on UI thread
...standard' way to specify that a task continuation should run on the thread from which the initial task was created?
5 Answe...
How to use Python to login to a webpage and retrieve cookies for later usage?
...rd) to /login.php. During the login request I want to retrieve the cookies from the response header and store them so I can use them in the request to download the webpage /data.php.
...
HTML-parser on Node.js [closed]
...node module for it. YQL I think would be the best solution if your HTML is from a static website, since you are relying on a service, not your own code and processing power. Though note that it won't work if the page is disallowed by the robot.txt of the website, YQL won't work with it.
If the webs...
How can I display an RTSP video stream in a web page?
...
It’s not easy to display live video stream from an IP camera on a web page because you need wide internet bandwidth and a great video player that is compatible with the major browsers.
But fortunately there are some cloud based services that can do this job for us. O...
How to efficiently compare two unordered lists (not sets) in Python?
...,000 ints with 5 repeats, Counter is 4x faster. python3.6 -m timeit -s 'from collections import Counter' -s 'from random import shuffle' -s 't=list(range(100)) * 5' -s 'shuffle(t)' -s 'u=t[:]' -s 'shuffle(u)' 'Counter(t)==Counter(u)'
– Raymond Hettinger
Oct ...
C++, copy set to vector
... emplace elements:
template <typename T>
std::vector<T> VectorFromSet(const std::set<T>& from)
{
std::vector<T> to;
to.reserve(from.size());
for (auto const& value : from)
to.emplace_back(value);
return to;
}
That way we will only invoke c...
Why does the JVM still not support tail-call optimization?
...ade statically in an object-oriented language. Instead, the transformation from tail-recursive function to simple loop must be done dynamically by a JIT compiler.
It then gives an example of Java code that won't transform.
So, as the example in Listing 3 shows, we cannot expect static compile...
How to list all tags along with the full message in git?
...
git tag -n99
Short and sweet. This will list up to 99 lines from each tag annotation/commit message. Here is a link to the official documentation for git tag.
I now think the limitation of only showing up to 99 lines per tag is actually a good thing as most of the time, if there were...
How to decode HTML entities using jQuery?
...an explanation of the vulnerabilities in this answer, and use the approach from either that answer or Mark Amery's answer instead.
Actually, try
var decoded = $("<div/>").html(encodedStr).text();
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