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What does the property “Nonatomic” mean?

...omic, and you generate the accessors using @synthesize, then if multiple threads try to change/read the property at once, badness can happen. You can get partially-written values or over-released/retained objects, which can easily lead to crashes. (This is potentially a lot faster than an atomic acc...
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Unable to load Private Key. (PEM routines:PEM_read_bio:no start line:pem_lib.c:648:Expecting: ANY PR

... Something is already working correctly with the "bad" format (i.e. unchanged headers), so, this is a makeshift solution, bound to break something that was already working fine, like, a reverse proxy that is not crashing for the lack of thos...
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sed one-liner to convert all uppercase to lowercase?

...e to lowercase, using sed . That means that the first sentence would then read, 'i have a textfile in which some words are printed in all caps.' ...
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upstream sent too big header while reading response header from upstream

...the proxy_buffer_size and the proxy_buffers, or disable it totally (Please read the nginx documentation). Example of proxy buffering configuration http { proxy_buffer_size 128k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; } Example of disabling your proxy buffer (recommended ...
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Is there an “exists” function for jQuery?

...ive—and one of those function calls recreates a jQuery object that you already have, which is just silly. – C Snover May 30 '10 at 4:14 ...
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Generator Expressions vs. List Comprehension

... @Annan Only if you already have access to another infinite generator. For example, itertools.count(n) is an infinite sequence of integers, starting from n, so (2 ** item for item in itertools.count(n)) would be an infinite sequence of the powers ...
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MyISAM versus InnoDB [closed]

...cts which involves a lot of database writes, I'd say ( 70% inserts and 30% reads ). This ratio would also include updates which I consider to be one read and one write. The reads can be dirty (e.g. I don't need 100% accurate information at the time of read). The task in question will be doing ov...
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Correct owner/group/permissions for Apache 2 site files/folders under Mac OS X?

...an access web content) chmod -R g+rx ~/my/web/root (all web content is now readable/executable/enterable by _www) All other solutions leave files open to other local users (who are part of the "staff" group as well as obviously being in the "o"/others group). These users may then freely browse an...
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How to convert OutputStream to InputStream?

...module exposes an OutputStream, the expectation is that there is something reading at the other end. Something that exposes an InputStream, on the other hand, is indicating that you will need to listen to this stream, and there will be data that you can read. So it is possible to connect an Input...
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How to get the Android device's primary e-mail address

... ADDRESS = 0; int IS_PRIMARY = 1; } } This requires both the READ_PROFILE and READ_CONTACTS permissions: <uses-permission android:name="android.permission.READ_PROFILE" /> <uses-permission android:name="android.permission.READ_CONTACTS" /> ...