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What is the difference between Python's list methods append and extend?
...ement to the end of a list. The length of the list itself will increase by one.
extend iterates over its argument adding each element to the list, extending the list. The length of the list will increase by however many elements were in the iterable argument.
append
The list.append method appends...
Two submit buttons in one form
I have two submit buttons in a form. How do I determine which one was hit serverside?
19 Answers
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How to check if a string contains text from an array of substrings in JavaScript?
...this:
if (new RegExp(substrings.join("|")).test(string)) {
// At least one match
}
...which creates a regular expression that's a series of alternations for the substrings you're looking for (e.g., one|two) and tests to see if there are matches for any of them, but if any of the substrings cont...
How to migrate GIT repository from one server to a new one
...igrate is my repository. This server is listed as the origin (master) for one of my projects. What is the proper way to move the repository to keep the history.
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Make xargs execute the command once for each line of input
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For me it can out as xargs -n 1 as the one you gave showed "argument list too long".
– Wernight
Sep 20 '11 at 9:14
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What are MVP and MVC and what is the difference?
...through an interface. This is to allow mocking of the View in a unit test. One common attribute of MVP is that there has to be a lot of two-way dispatching. For example, when someone clicks the "Save" button, the event handler delegates to the Presenter's "OnSave" method. Once the save is completed,...
FFmpeg: How to split video efficiently?
....ts -vcodec copy -acodec copy -ss 00:30:00 -t 01:00:00 -sn test2.mkv
echo "One command"
time ffmpeg -v quiet -y -i input.ts -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 \
-sn test3.mkv -vcodec copy -acodec copy -ss 00:30:00 -t 01:00:00 -sn test4.mkv
Which outputs...
Two commands
real 0m...
What is the difference between id and class in CSS, and when should I use them? [duplicate]
...s are useful when you have, or possibly will have in the future, more than one element that shares the same style. An example may be a div of "comments" or a certain list style to use for related links.
Additionally, a given element can have more than one class associated with it, while an element...
MySQL INNER JOIN select only one row from second table
...I think that my answer is more simple and is faster because I'm using just one inner join. Maybe I'm wrong?
– Mihai Matei
Sep 21 '12 at 8:01
2
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How can I pair socks from a pile efficiently?
...as doing it is not very efficient. I was doing a naive search — picking one sock and "iterating" the pile in order to find its pair. This requires iterating over n/2 * n/4 = n 2 /8 socks on average.
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