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Stop/Close webcam which is opened by navigator.getUserMedia
I opened a webcam by using the following JavaScript code: navigator.getUserMedia
16 Answers
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Is there a short cut for going back to the beginning of a file by vi editor?
When reading a long file by vi editor, it would be very nice to get back to the beginning of the file by some short cuts when you really need to do so. Even ctrl + B sometimes is too slow. Does anyone know such a tool?
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When should I use a struct instead of a class?
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(integer, double, and so on).
It has an instance size smaller than 16 bytes.
It is immutable.
It will not have to be boxed frequently.
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How to generate a core dump in Linux on a segmentation fault?
... @lzprgmr: To clarify: the reason why core dumps are not generated by default is that the limit is not set and/or set to 0, which prevents the core from being dumped. By setting a limit of unlimited, we guarantee that core dumps can always be generated.
– Eli Courtwrig...
Remove element by id
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}
And then you can remove elements like this
document.getElementById("my-element").remove();
or
document.getElementsByClassName("my-elements").remove();
Note: this solution doesn't work for IE 7 and below. For more info about extending the DOM read this article.
EDIT: Reviewing my a...
SQL to find the number of distinct values in a column
... also works on groups select A,COUNT(DISTINCT B) from table group by A
– tmanthey
Apr 18 '13 at 15:07
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How to remove local (untracked) files from the current Git working tree
...-X] [--] <path>…
Description
Cleans the working tree by recursively removing files that are not under version control, starting from the current directory.
Normally, only files unknown to Git are removed, but if the -x option is specified, ignored files are also removed. T...
Naming convention - underscore in C++ and C# variables
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@ChaosPandion I'm assuming that what you mean by "immutable" is actually "read-only", in which case one can use public string Name { get; private set; }. True, it's not perfectly immutable, but it's there.
– jdmichal
Jun 29 '10 at 1...
Python circular importing?
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I think the answer by jpmc26, while by no means wrong, comes down too heavily on circular imports. They can work just fine, if you set them up correctly.
The easiest way to do so is to use import my_module syntax, rather than from my_module im...
Random row from Linq to Sql
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You can do this at the database, by using a fake UDF; in a partial class, add a method to the data context:
partial class MyDataContext {
[Function(Name="NEWID", IsComposable=true)]
public Guid Random()
{ // to prove not used by our C# code...