大约有 27,000 项符合查询结果（耗时：0.0258秒） [XML]
PostgreSQL error: Fatal: role “username” does not exist
...odd setups with non-standard user names or where the operating system user does not exist. You'd need to adapt your strategy there.
Read about database roles and client authentication in the manual.
share
|
...
What does the “__block” keyword mean?
What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know...
...
Why does C++ need a separate header file?
...s, although there are other uses for header files.
The answer is that C++ doesn't "need" this. If you mark everything inline (which is automatic anyway for member functions defined in a class definition), then there is no need for the separation. You can just define everything in the header files.
...
Which characters need to be escaped when using Bash?
...yte (except when it's empty). That's why both above sed commands assume it does not. You can add a quoted newline manually.
Note that shell variables are only defined for text in the POSIX sense. Processing binary data is not defined. For the implementations that matter, binary works with the excep...
Where does PHP store the error log? (php5, apache, fastcgi, cpanel)
...m on shared hosting and have Cpanel, Apache, PHP is run by fastcgi. Where does PHP store the error log?
21 Answers
...
Confused by python file mode “w+”
...
what does "truncating to 0 bytes" mean?
– Nasif Imtiaz Ohi
Jan 5 '18 at 23:49
25
...
What does GitHub for Windows' “sync” do?
...
Sync does git pull --rebase and then if there are local changes, it does git push.
From here: http://haacked.com/archive/2012/05/21/introducing-github-for-windows.aspx#87318
...
Why does !{}[true] evaluate to true in JavaScript?
...
Because {}[true] does not return true, but undefined, and undefined is evaluated as false:
http://jsfiddle.net/67GEu/
'use strict';
var b = {}[true];
alert(b); // undefined
b = !{}[true];
alert(b); // true
...
psql: FATAL: role “postgres” does not exist
...ew, see the comment from @user3402754 below.
Note that the error message does NOT talk about a missing database, it talks about a missing role. Later in the login process it might also stumble over the missing database.
But the first step is to check the missing role: What is the output within ps...
What does “static” mean in C?
...mory
instead of the automatically allocated
memory. While the language does not
dictate the implementation of either
type of memory, statically allocated
memory is typically reserved in data
segment of the program at compile
time, while the automatically
allocated memory is normally
...