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Virtual Serial Port for Linux
...ates the hardware pins (RTC/CTS DSR/DTR). It even implements TIOCMGET/TIOCMSET and TIOCMIWAIT iotcl commands!
On a recent kernel you may get compilation errors. This is easy to fix. Just insert a few lines at the top of the module/tty0tty.c source (after the includes):
#ifndef init_MUTEX
#define i...
How many levels of pointers can we have?
... didn't try higher. So I'd guess g++ doesn't impose any limit either. (Try setting size = 10 and looking in ptr.cpp if it's not immediately obvious.)
g++ create.cpp -o create ; ./create > ptr.cpp ; g++ ptr.cpp -o ptr ; ./ptr
create.cpp
#include <iostream>
int main()
{
const int size...
How can I quantify difference between two images?
...PIL library will help to do it in Python.
If they are taken with the same settings and the same device, they are probably the same.
Are images well-aligned?
If not, you may want to run cross-correlation first, to find the best alignment first. SciPy has functions to do it.
If the camera and the s...
Issue pushing new code in Github
I created a new repository on Github which has only Readme.md file now.
14 Answers
14
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Possible reason for NGINX 499 error codes
...at the reader knows as little as I did when I started playing around.
My setup was a reverse proxy, the nginx server, and an application server, the uWSGI server behind it. All requests from the client would go to the nginx server, then forwarded to the uWSGI server, and then response was sent the...
Is an empty href valid?
...onsider: it will not be keyboard-focusable without having a tabindex value set. Furthermore, this will be inaccessible to screenreader software using Internet Explorer, as IE will report through the accessibility interfaces that any anchor element without an href attribute as not-focusable, regardle...
Makefile variable as prerequisite
In a Makefile, a deploy recipe needs a environment variable ENV to be set to properly execute itself, whereas others don't care, e.g.:
...
How to make the tab character 4 spaces instead of 8 spaces in nano?
...convert tabs to spaces.
Edit your ~/.nanorc file (or create it) and add:
set tabsize 4
set tabstospaces
If you already got a file with tabs and want to convert them to spaces i recommend the expandcommand (shell):
expand -4 input.py > output.py
...
How do I alias commands in git?
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I prefer settings st to status -s (short status)
– hasen
Mar 31 '10 at 15:59
20
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How to assign from a function which returns more than one value?
...into the R logic... what is the "best" way to unpack (on LHS) the results from a function returning multiple values?
13 An...