大约有 45,000 项符合查询结果（耗时：0.0356秒） [XML]
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
I have installed MySQL server and trying to connect to it, but getting the error:
18 Answers
...
CleanWPPAllFilesInSingleFolder error makes my project no longer load
...ent settings. I am not sure what setting I changed exactly as there was no error. However when I try and load the solution I get the following error for the project and it will no longer load.
...
With bash, how can I pipe standard error into another process?
...
Bash 4 has this feature:
If `|&' is used, the standard error of command1 is connected to command2's standard input through the pipe; it is shorthand for 2>&1 |. This implicit redirection of the standard error is performed after any redirections specified by the command.
...
cleanest way to skip a foreach if array is empty [duplicate]
... code with an unnecessary if statement. If $items is empty php throws an error.
11 Answers
...
capturing self strongly in this block is likely to lead to a retain cycle
...ce: you're not wrong. I interpreted the question to be primarily about the error Xcode presents ("How can I avoid this warning in xcode"), rather than about the actual presence of a retain cycle. You're correct in saying no retain cycle is evident just from the snippet OP provided.
...
How to check if a variable is set in Bash?
...e null | assign word |
| ${parameter:?word} | substitute parameter | error, exit | error, exit |
| ${parameter?word} | substitute parameter | substitute null | error, exit |
| ${parameter:+word} | substitute word | substitute null | substitute null |
| ${parameter+word} | ...
Swift - class method which must be overridden by subclass
...erridden by every subclass, and which, if it is not, causes a compile time error?
6 Answers
...
Cleanest way to write retry logic?
...
+1, especially for the warning and error-checking. I'd be more comfortable if this passed in the type of the exception to catch as a generic parameter (where T: Exception), though.
– TrueWill
Oct 13 '09 at 22:55
...
How to check if a Unix .tar.gz file is a valid file without uncompressing?
...the filesystem. If the tar file is corrupt, the process will abort with an error.
Example of failed tar ball test...
$ echo "this will not pass the test" > hello.tgz
$ tar -xvzf hello.tgz -O > /dev/null
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from...
range() for floats
...robust. If you do it directly with floats, you risk having strange one-off errors due to how floats are represented internally. For instance, if you try list(frange(0, 1, 0.5)), it works fine and 1 is excluded, but if you try list(frange(0, 1, 0.1)), the last value you get is close to 1.0, which is ...