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Which version of PostgreSQL am I running?
I'm in a corporate environment (running Debian Linux) and didn't install it myself. I access the databases using Navicat or phpPgAdmin (if that helps). I also don't have shell access to the server running the database.
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What are the correct link options to use std::thread in GCC under linux?
... I am trying to compile a very simple program using gcc 4.7.1 and I am having the very same "operation not permitted" error. The problem is that I'm already using -pthread flag. Is there any other flag you know about?
– Filipe
Dec 13 '12 at 11:34
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Set value to NULL in MySQL
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You're probably quoting 'NULL'. NULL is a reserved word in MySQL, and can be inserted/updated without quotes:
INSERT INTO user (name, something_optional) VALUES ("Joe", NULL);
UPDATE user SET something_optional = NULL;
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How to sort an array of hashes in ruby
...hod to modify in place: array_of_hashes.sort_by!{}
– Andrew
Jul 25 '13 at 17:50
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How can I set Image source with base64
...8GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='
);
Real answer:
(And make sure you remove the line-breaks in the base64.)
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How can I expose more than 1 port with Docker?
... EXPOSE is only documentation for the ports that are published and useful for linking only. A complete list of ports can be found using -P and they will be automatically mapped to an available port on the host.
– Arun Gupta
Oct 20 '15 at 11:01
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What is mattr_accessor in a Rails module?
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Rails extends Ruby with both mattr_accessor (Module accessor) and cattr_accessor (as well as _reader/_writer versions). As Ruby's attr_accessor generates getter/setter methods for instances, cattr/mattr_accessor provide getter/setter methods at the class or module level. Thus:
module...
What is the method for converting radians to degrees?
I run into this occasionally and always forget how to do it.
12 Answers
12
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Hash String via SHA-256 in Java
...;
import java.security.NoSuchAlgorithmException;
import java.nio.charset.StandardCharsets;
import java.math.BigInteger;
public class CryptoHash {
public static void main(String[] args) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance("SHA-256");
String text =...
Place a button right aligned
...from the normal document flow so they can overflow their parent's boundary and mess up the parent's height, the clear:both CSS takes care of that (as does overflow:hidden). Play around with the JSFiddle example I added to see how floating and clearing behave (you'll want to drop the overflow:hidden ...