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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
What is the proper way to get a list of all available serial ports/devices on a Linux system?
12 Answers
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Sort points in clockwise order?
...ow do I sort the points of this array in clockwise order (around their overall average center point)? My goal is to pass the points to a line-creation function to end up with something looking rather "solid", as convex as possible with no lines intersecting.
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How to overload std::swap()
...nd swap, but no it's not mandated, so you can't count on it. You can specialize std::swap for a specific concrete type as shown by the OP; just don't expect that specialization to get used, e.g. for derived classes of that type.
– Dave Abrahams
Jun 1 '10 at 15...
Android: How can I pass parameters to AsyncTask's onPreExecute()?
...) {
super();
// do stuff
}
// doInBackground() et al.
}
Then, when calling the task, do something like:
new MyAsyncTask(true).execute(maybe_other_params);
Edit: this is more useful than creating member variables because it simplifies the task invocation. Compare the c...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
... .386
.model flat,stdcall
option casemap:none
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
; Include 文件定义
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
include ...
How can I plot with 2 different y-axes?
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update: Copied material that was on the R wiki at http://rwiki.sciviews.org/doku.php?id=tips:graphics-base:2yaxes, link now broken: also available from the wayback machine
Two different y axes on the same plot
(some material originally by Danie...
OpenSUSE 升级最新系统步骤 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...稳定的更新源，或内网搭建的更新源） URL是源的地址，Alias是自定义的源的别名，-f 开启自动刷新zypper addrepo -f [URL] [Al 步骤如下：
#添加镜像地址，如果需要的话（更快更稳定的更新源，或内网搭建的更新源）
#URL是源的地...
count(*) vs count(column-name) - which is more correct? [duplicate]
...
COUNT(*) counts all rows
COUNT(column) counts non-NULLs only
COUNT(1) is the same as COUNT(*) because 1 is a non-null expressions
Your use of COUNT(*) or COUNT(column) should be based on the desired output only.
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Convert light frequency to RGB?
...oes anyone know of any formula for converting a light frequency to an RGB value?
9 Answers
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How to screenshot website in JavaScript client-side / how Google did it? (no need to access HDD) [du
...em.
You can use JavaScript/Canvas to do the job but it is still experimental.
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