大约有 15,590 项符合查询结果（耗时：0.0323秒） [XML]
Is it good practice to NULL a pointer after deleting it?
...ce of code. While a segfault is usually better than silently ignoring the error, the segfault isn't guaranteed in this case, and it's of questionable utility.
– Adam Rosenfield
Dec 18 '09 at 23:10
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Should IBOutlets be strong or weak under ARC?
... too slow because of weak IBOutlets.
Not using weak may be perceived as an error.
Bottom line: Since iOS 6 we can't get this wrong anymore as long as we don't use view unloading. Time to party. ;)
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Intercept page exit event
...use async ajax requests and a loop which checks results (either success or error) from callbacks of the requests.
– framp
Sep 4 '12 at 21:59
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How can I recall the argument of the previous bash command?
...provide a little more detail (eg. ubuntu command line, cygwin for windows? error message? previous line?)
– Robert Gowland
Feb 14 '14 at 14:59
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Ternary operator (?:) in Bash
...ug: if op1 has a nonzero exit status, op2 silently becomes the result; the error will also not be caught in -e mode. So, that expression is only safe to use if op1 can never fail (e.g., :, true if a builtin, or variable assignment without any operations that can fail (like division and OS calls)).
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Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
...oping an app on Heroku with a Postgresql backend. Periodically, I get this error message when trying to access the database, both from the CLI and from loading a page on the server:
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Get table column names in MySQL?
... return $output;
}
catch(PDOException $pe) {
trigger_error('Could not connect to MySQL database. ' . $pe->getMessage() , E_USER_ERROR);
}
}
The output will be an array:
Array (
[0] => id
[1] => name
[2] => email
[3] => shoe_size
[4] => likes
... )
Sor...
Unable to load Private Key. (PEM routines:PEM_read_bio:no start line:pem_lib.c:648:Expecting: ANY PR
... Oh my good God! THANK YOU! I would've never figured that out by trial and error, fixed the issue for me!
– Mikael Dyreborg Hansen
Apr 15 at 12:48
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facebook: permanent Page Access Token?
...he (#100) Tried accessing nonexisting field (accounts) on node type (Page) error... unable to proceed with step 5... Still, thank you... LE: check out the last part of the answer provided by @Vlasec. You can get the permanent access token by querying /{pageId}?fields=access_token&access_token={...
How to find if div with specific id exists in jQuery?
... stupid). However when I replace the alert() with something else I get an error saying: "unexpected end of file while searching for class name". why is this happening? See my OP for what I'm replacing my alert() function with...
– sadmicrowave
Jul 30 '10 at ...