大约有 47,000 项符合查询结果（耗时：0.0966秒） [XML]
Select distinct values from a table field
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206
Say your model is 'Shop'
class Shop(models.Model):
street = models.CharField(max_length=15...
Using smart pointers for class members
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202
A unique_ptr would not work because of getDevice(), right?
No, not necessarily. What is im...
CSS3 background image transition
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103
You can transition background-image. Use the CSS below on the img element:
-webkit-transition:...
Why use @PostConstruct?
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edited Oct 5 '11 at 13:20
Jasper
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answered Aug ...
Peak detection in a 2D array
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+500
I detected the peaks using a local maximum filter. Here is the result on your first dataset of 4 paws:
I also ran it on the second ...
How is performance affected by an unused using directive?
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answered Jul 22 '09 at 2:34
JaredParJaredPar
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What does @@variable mean in Ruby?
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240
A variable prefixed with @ is an instance variable, while one prefixed with @@ is a class variab...
How do I squash two non-consecutive commits?
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edited Apr 28 at 6:05
rogerdpack
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an...
Is it possible to use 'else' in a list comprehension? [duplicate]
...e used in comprehension statements:
>>> [a if a else 2 for a in [0,1,0,3]]
[2, 1, 2, 3]
So for your example,
table = ''.join(chr(index) if index in ords_to_keep else replace_with
for index in xrange(15))
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if A vs if A is not None:
...peration bool(); should return False or True, or their integer equivalents 0 or 1. When this method is not defined, __len__() is called, if it is defined, and the object is considered true if its result is nonzero. If a class defines neither __len__() nor __nonzero__(), all its instances are conside...