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Bitwise operation and usage
...Bitwise operators are operators that work on multi-bit values, but conceptually one bit at a time.
AND is 1 only if both of its inputs are 1, otherwise it's 0.
OR is 1 if one or both of its inputs are 1, otherwise it's 0.
XOR is 1 only if exactly one of its inputs are 1, otherwise it's 0.
NOT is 1...
How does password salt help against a rainbow table attack?
... attack. However, the methods I've seen to implement this don't seem to really make the problem harder.
10 Answers
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How to set environment variable for everyone under my linux system?
Can I have certain settings that are universal for all my users?
7 Answers
7
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How to print time in format: 2009‐08‐10 18:17:54.811
...
Superb answer. I could do all sorts of things in PHP, but knew it was all there already in C. THanks.
– Vijay Kumar Kanta
Jan 23 '14 at 12:43
...
Can't connect Nexus 4 to adb: unauthorized
... for me until I disabled Windows AutoPlay by unchecking "Use AutoPlay" for all media and devices."
– user1985189
Oct 22 '14 at 17:42
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Should I use 'border: none' or 'border: 0'?
...ng here but Webpack→LESS→PostCSS→PurgeCSS is a good 2020 stack.
That all said, if you're hand-writing all your production CSS, I maintain —despite the grumbling in the comments— it does not hurt to be bandwidth conscious. Using border:0 will save an infinitesimal amount of bandwidth on its...
What does OSGi solve?
I've read on Wikipedia and other sites about OSGi , but I don't really see the big picture. It says that it's a component-based platform, and that you can reload modules at runtime. Also the "practical example" given everywhere is the Eclipse Plugin Framework.
...
jQuery UI accordion that keeps multiple sections open?
...ow do you keep multiple sections in jQuery UI's accordion open? The demos all have only one open at a time... I'm looking for a collapseable menu type system.
...
How can I get the URL of the current tab from a Google Chrome extension?
... tabs => {
let url = tabs[0].url;
// use `url` here inside the callback because it's asynchronous!
});
This requires that you request access to the chrome.tabs API in your extension manifest:
"permissions": [ ...
"tabs"
]
It's important to note that the definition of your "current...
PostgreSQL: How to change PostgreSQL user password?
...ostgresql/9.1/main/pg_hba.conf (path will differ) and change:
local all all peer
to:
local all all md5
Then restart the server:
$ sudo service postgresql restart
...