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Efficiently test if a port is open on Linux?
...ise I found out recently is that Bash natively supports tcp connections as file descriptors. To use:
exec 6<>/dev/tcp/ip.addr.of.server/445
echo -e "GET / HTTP/1.0\n" >&6
cat <&6
I'm using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes use...
How to uncommit my last commit in Git [duplicate]
...t of committing and everything you'd staged, but leave the work tree (your files intact):
git reset HEAD^
And if you actually want to completely undo it, throwing away all uncommitted changes, resetting everything to the previous commit (as the original question asked):
git reset --hard HEAD^
...
PHP session lost after redirect
...t it on.
Ensure register_globals is off, you can check this on the php.ini file and also using phpinfo(). Refer to this as to how to turn it off.
Make sure you didn't delete or empty the session
Make sure the key in your $_SESSION superglobal array is not overwritten anywhere
Make sure you redirect ...
Brew doctor says: “Warning: /usr/local/include isn't writable.”
...
Well, not in High Sierra. "Unable to change file mode on /usr/local: Operation not permitted"
– user980018
Nov 3 '17 at 16:52
1
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How do I mock an autowired @Value field in Spring with Mockito?
...olution for mocking the properties that are retrieving from the properties file.
– Antony Sampath Kumar Reddy
Dec 2 '19 at 6:46
...
How to add images to README.md on GitHub?
... going with the relative paths (which for me is just the name of the image file because I have everything in root). I had been maintaining 2 copies of the README.md, one for local installation in /usr/share/projectname/docs, and one for github. Now, I can just use the same README.md for both since t...
Unable to load DLL (Module could not be found HRESULT: 0x8007007E)
...not all the dependencies had the same CPU type (x86/x64). I copied all the files that had the same CPU type to my application's bin folder, and that resolved the problem.
– DiligentKarma
May 16 '13 at 17:58
...
How to escape text for regular expression in Java
...av, and the replaceAll would turn it into \.*\.wav, meaning it would match files whose name consists of a arbitrary number of periods followed by .wav. You'd most likely have needed to replaceAll("\\*", ".*") if they'd gone with the more fragile implementation that relies on recognizing all possible...
Select all child elements recursively in CSS
...es even if they have a higher priority.. (they are placed later in the css file)
– clarkk
Feb 5 '11 at 22:33
The selec...
'printf' vs. 'cout' in C++
...hen you print many arguments. If you have to write something like Error 2: File not found., assuming error number, and its description is placeholder, the code would look like this. Both examples work identically (well, sort of, std::endl actually flushes the buffer).
printf("Error %d: %s.\n", id, ...