大约有 40,000 项符合查询结果(耗时:0.1446秒) [XML]

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Why does MYSQL higher LIMIT offset slow the query down?

....com/2013/06/19/3-ways-to-optimize-for-paging-in-mysql/ It works too with strings share | improve this answer | follow | ...
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Doctrine and composite unique keys

...html So the original example could look something like this: /** * @var string $videoDimension * * @ORM\Id @ORM\Column(type="string") */ private $videoDimension; /** * @var string $videoBitrate * * @ORM\Id @ORM\Column(type="string") */ private $videoBitrate; A few notes here: Column "...
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Split files using tar, gz, zip, or bzip2 [closed]

... Actually using -b 1024MiB gave an error that it was an invalid number of bytes. Using --bytes=1024m works. – Brian Mar 13 '14 at 12:52 ...
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Primary key or Unique index?

...ork we have a big database with unique indexes instead of primary keys and all works fine. 15 Answers ...
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Center a map in d3 given a geoJSON object

...bounding box to 95% of the canvas, rather than 100%, so there’s a little extra room on the edges for strokes and surrounding features or padding. Then you can compute the translate using the center of the bounding box ((b[1][0] + b[0][0]) / 2 and (b[1][1] + b[0][1]) / 2) and the center of the can...
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What is the difference between ndarray and array in numpy?

...r are used. If buffer is an object exposing the buffer interface, then all keywords are interpreted. The example below gives a random array because we didn't assign buffer value: np.ndarray(shape=(2,2), dtype=float, order='F', buffer=None) array([[ -1.13698227e+002, 4.25087011e-303], ...
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How to convert SQL Query result to PANDAS Data Structure?

... that will do the job: from pandas import DataFrame df = DataFrame(resoverall.fetchall()) df.columns = resoverall.keys() You can go fancier and parse the types as in Paul's answer. share | improv...
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How to fully remove Xcode 4

I want to remove all existing SDK versions as well as Xcode 4. 7 Answers 7 ...
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Select all text inside EditText when it gets focus

... You can try in your main.xml file: android:selectAllOnFocus="true" Or, in Java, use editText.setSelectAllOnFocus(true); share | improve this answer | ...
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Get all attributes of an element using jQuery

I am trying to go through an element and get all the attributes of that element to output them, for example an tag may have 3 or more attributes, unknown to me and I need to get the names and values of these attributes. I was thinking something along the lines of: ...