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Can not connect to local PostgreSQL
...ile permissions to access the socket file. To confirm this I've done some tests on Ubuntu and psql to try to generate the same error (included below).
You need to check the permissions on the socket file and its directories /var and /var/pgsql_socket. Your Rails app (OSX user) must have execute (...
MySQL: Set user variable from result of query
...FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
Test case:
CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (123456, 5);
INSERT INTO user VALUES (111111, 5);
Result:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT ...
How to negate the whole regex?
...t the end are both critical bits. As always with REs, a strong set of unit tests is absolutely critical to getting it right. This answer is 100% correct.
– Tom Dibble
Aug 7 '18 at 19:30
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What's the difference between “static” and “static inline” function?
...t have that information readily available and don't have time to setup and test lots of gcc versions at the moment, but I agree it would be useful information to have. You could probably find when gcc first started optimizing out unused static functions/objects by looking at the history of attribute...
Why is my Spring @Autowired field null?
... // TODO Auto-generated method stub
System.out.println("test");
ApplicationContext ctx=new ClassPathXmlApplicationContext("spring.xml");
System.out.println("ctx>>"+ctx);
Customer c1=null;
MyDemo myDemo=ctx.getBean(MyDemo.class...
How to select a node using XPath if sibling node has a specific value?
...-sibling XPath axis
//a/bb[text()="zz"]/following-sibling::cc[1]/text()
Test the Xpath here: http://www.xpathtester.com/obj/b55ec3ac-dfa4-4f44-81e8-f963ea4a0625
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Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...much more sense to use Argon2 these days anyway, for which there is a well-tested C# library
– Polynomial
Jan 2 '17 at 21:43
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SQLite add Primary Key
...eger,j integer,t text,primary key(i,j))' WHERE name='tab1';
COMMIT;
Some tests (in sqlite shell):
sqlite> explain query plan select * from tab1 order by i,j;
0|0|0|SCAN TABLE tab1 USING INDEX sqlite_autoindex_tab1_1
sqlite> drop index sqlite_autoindex_tab1_1;
Error: index associated with UN...
invalid target release: 1.7
...ion 2503658 and the use of the $JAVACMD variable might help but I haven't tested it myself.
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Default string initialization: NULL or Empty? [closed]
...lid values will make your code easier to understand. This is why I always test booleans with "if (var)," pointers with "if (var != NULL)" and integers with "if (var != 0)" -- they all mean the same thing to the compiler, but they carry additional information that helps the poor developer who mainta...