大约有 41,200 项符合查询结果（耗时：0.0450秒） [XML]
jQuery - checkbox enable/disable
...checkboxes like this. If the "Check Me" checkbox is checked, all the other 3 checkboxes should be enabled, else they should be disabled. How can I do this using jQuery?
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unix - head AND tail of file
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answered Dec 24 '11 at 13:29
Aleksandra ZalcmanAleksandra Zalcman
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python pandas dataframe to dictionary
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answered Sep 9 '13 at 9:55
jorisjoris
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Do threads have a distinct heap?
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edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Nov 3 '09 at 5:33
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Rails 3: Get Random Record
...NDOM()") # For MySQL :order => "RAND()", - thanx, @DanSingerman
# Rails 3
Thing.order("RANDOM()").first
or
Thing.first(:offset => rand(Thing.count))
# Rails 3
Thing.offset(rand(Thing.count)).first
Actually, in Rails 3 all examples will work. But using order RANDOM is quite slow for big ta...
How does Django's Meta class work?
...:55
Moon
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answered Apr 27 '12 at 3:04
TadeckTadeck
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What does pylint's “Too few public methods” message mean
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edited Dec 23 '17 at 0:53
June7
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an...
Weighted random numbers
...andom number that is 0 or greater and is less than the sum of the weights
3) go through the items one at a time, subtracting their weight from your random number, until you get the item where the random number is less than that item's weight
Pseudo-code illustrating this:
int sum_of_weight = 0;
f...
What is the difference between range and xrange functions in Python 2.X?
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836
In Python 2.x:
range creates a list, so if you do range(1, 10000000) it creates a list in mem...