大约有 46,000 项符合查询结果（耗时：0.0437秒） [XML]
“Collection was mutated while being enumerated” on executeFetchRequest
... of the background thread. When Apple tells that each thread needs to have its own moc, you have to take it seriously : each moc must be instantiated in the thread that will be using it !
Moving the following lines...
// We instantiate the background moc
self.backgroundMOC = [[[NSManagedObjectCon...
CUDA incompatible with my gcc version
I have troubles compiling some of the examples shipped with CUDA SDK.
I have installed the developers driver (version 270.41.19) and the CUDA toolkit,
then finally the SDK (both the 4.0.17 version).
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Send message to specific client with socket.io and node.js
I'm working with socket.io and node.js and until now it seems pretty good, but I don't know how to send a message from the server to an specific client, something like this:
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count(*) vs count(column-name) - which is more correct? [duplicate]
Does it make a difference if you do count(*) vs count(column-name) as in these two examples?
5 Answers
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MongoDB not equal to
...rd operator:
An examples for $ne, which stands for not equal:
use test
switched to db test
db.test.insert({author : 'me', post: ""})
db.test.insert({author : 'you', post: "how to query"})
db.test.find({'post': {$ne : ""}})
{ "_id" : ObjectId("4f68b1a7768972d396fe2268"), "author" : "you", "post" : ...
What are unit tests, integration tests, smoke tests, and regression tests?
What are unit tests, integration tests, smoke tests, and regression tests? What are the differences between them and which tools can I use for each of them?
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ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...r than having a huge SQL query.
I saw elasticsearch recently and played with whoosh (a Python implementation of a search engine).
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Find out HTTP method in PHP [duplicate]
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$_SERVER['REQUEST_METHOD']
See the docs. It will contain the request method upper-cased (i.e. 'GET', 'HEAD', 'POST', 'PUT').
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Open URL in new window with JavaScript
...share the current page. I would like to take the current page URL and open it in a new window. I have the current URL part working, but can't seem to get the next part working.
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How to convert 'binary string' to normal string in Python3?
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Decode it.
>>> b'a string'.decode('ascii')
'a string'
To get bytes from string, encode it.
>>> 'a string'.encode('ascii')
b'a string'
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