大约有 19,000 项符合查询结果(耗时:0.0465秒) [XML]

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What is the purpose of Android's tag in XML layouts?

... element in layout2. If layout2 had multiple elements, then it MUST have a root node to be valid XML and that's when the merge tag comes in handy. – gMale Feb 22 '14 at 16:37 3 ...
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In a storyboard, how do I make a custom cell for use with multiple controllers?

...entifier: To use it, put a UITableViewCell in a nib. It has to be the only root object in the nib. You can register the nib after loading your tableView, then when you call dequeueReusableCellWithIdentifier: with the cell identifier, it will pull it from the nib, just like if you had used a Storyboa...
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postgresql return 0 if returned value is null

... are NULL values in the query. For all versions I've tested, postgres and mysql will ignore all NULL values when averaging, and it will return NULL if there is nothing to average over. This generally makes sense, as NULL is to be considered "unknown". If you want to override this you can use coale...
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How many bytes does one Unicode character take?

...ints.net/. I wasted a lot of time on this useless list (but it's sorted!). MySQL has a charset called "utf8" which actually does not support characters longer than 3 bytes. So you can't insert a pile of poo, the field will be silently truncated. Use "utf8mb4" instead. There's a snowman test page (un...
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How do API Keys and Secret Keys work? Would it be secure if I have to pass my API and secret keys to

...d the secret key, and with most Unix based systems, if an attacker can get root access they can get the key. If you encrypt the key, you have to have code to decrypt it, and at some point the decryption code has to be plain text so it can be executed. This is the same problem DRM has, except that yo...
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Is there any NoSQL data store that is ACID compliant?

... Good answer. You can have both NoSQL+ACID and non-ACID-RDBMS (think MySQL + MyISAM). I'd usually consider NoSQL as "eventually consistent". I'll throw in the CAP theorem too... :-) – gbn Feb 27 '12 at 9:48 ...
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deciding among subprocess, multiprocessing, and thread in Python?

...e introduction to concurrency in the Python3 docs. – root-11 Oct 17 '18 at 8:35 1 @root-11 you're...
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Moving matplotlib legend outside of the axis makes it cutoff by the figure box

...er response from the matplotlib mailling list (Thanks goes out to Benjamin Root). The code I am looking for is adjusting the savefig call to: fig.savefig('samplefigure', bbox_extra_artists=(lgd,), bbox_inches='tight') #Note that the bbox_extra_artists must be an iterable This is apparently simil...
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Error message “Forbidden You don't have permission to access / on this server” [closed]

...0> .... # Set access permission <Directory "/path/to/docroot"> Allow from all </Directory> .... </VirtualHost> As of Apache-2.4, however, access control is done using the new module mod_authz_host (Upgrading to 2.4 from 2.2). Consequently, the new...
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Protecting executable from reverse engineering?

...eed to obfuscate code if the code were uncrackable in the first place. The root of the problem is crackable software. Fix the root of your problem, don't just obfuscate it. Also, the more confusing you make your code, the harder it will be for YOU to find security bugs. Yes, it will be hard for hac...