大约有 43,200 项符合查询结果（耗时：0.0772秒） [XML]
mysql - how many columns is too many?
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144
It's considered too many once it's above the maximum limit supported by the database.
The fac...
What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
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edited Sep 6 '19 at 11:17
thecoshman
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How to conditionally push an item in an observable array?
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edited Dec 7 '11 at 17:51
answered Dec 7 '11 at 16:15
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Reset push notification settings for app
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14 Answers
14
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Securely storing environment variables in GAE with app.yaml
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13 Answers
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How can I determine the type of an HTML element in JavaScript?
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edited Dec 29 '15 at 22:11
Michał Perłakowski
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How to unzip a list of tuples into individual lists? [duplicate]
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Use zip(*list):
>>> l = [(1,2), (3,4), (8,9)]
>>> list(zip(*l))
[(1, 3, 8), (2, 4, 9)]
The zip() function pairs up the elements from all inputs, starting with the first values, then the second, etc. By using *l you apply all tuples in l as ...
Is there a recommended format for multi-line imports?
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163
Personally I go with parentheses when importing more than one component and sort them alphabet...
What does @@variable mean in Ruby?
... is in the comments at the end of the puts lines:
class Test
@@shared = 1
def value
@@shared
end
def value=(value)
@@shared = value
end
end
class AnotherTest < Test; end
t = Test.new
puts "t.value is #{t.value}" # 1
t.value = 2
puts "t.value is #{t.value}" # 2
x = Test.new...
How to get the first element of an array?
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31 Answers
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