大约有 46,000 项符合查询结果（耗时：0.0584秒） [XML]
SQL WHERE ID IN (id1, id2, …, idn)
...ormance like with IN. There's still the readability issue though...
Option 3 is simply horrible performance-wise. It sends a query every loop and hammers the database with small queries. It also prevents it from using any optimizations for "value is one of those in a given list"
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How can I convert an RGB image into grayscale in Python?
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320
How about doing it with Pillow:
from PIL import Image
img = Image.open('image.png').convert('...
Python: most idiomatic way to convert None to empty string?
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answered Jun 23 '09 at 19:28
TriptychTriptych
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How to output numbers with leading zeros in JavaScript [duplicate]
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answered Jun 8 '10 at 15:33
InfinitiesLoopInfinitiesLoop
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indexOf method in an object array?
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edited Feb 1 '18 at 13:40
thomasb
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answered ...
Python module for converting PDF to text [closed]
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13 Answers
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Do AJAX requests retain PHP Session info?
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edited Nov 20 '12 at 3:50
answered Mar 24 '09 at 11:10
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setImmediate vs. nextTick
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edited Mar 13 '13 at 14:10
answered Mar 11 '13 at 22:26
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Default behavior of “git push” without a branch specified
... community wiki
15 revs, 11 users 34%UncleZeiv
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Convert a Unix timestamp to time in JavaScript
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let unix_timestamp = 1549312452
// Create a new JavaScript Date object based on the timestamp
// multiplied by 1000 so that the argument is in milliseconds, not seconds.
var date = new Date(unix_timestamp * 1000);
// Hours part from the timestamp...