大约有 48,000 项符合查询结果（耗时：0.0601秒） [XML]
Random record in ActiveRecord
...e current record count) as an offset.
offset = rand(Model.count)
# Rails 4
rand_record = Model.offset(offset).first
# Rails 3
rand_record = Model.first(:offset => offset)
To be honest, I've just been using ORDER BY RAND() or RANDOM() (depending on the database). It's not a performance issue ...
Split string, convert ToList() in one line
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479
var numbers = sNumbers.Split(',').Select(Int32.Parse).ToList();
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How do I remove a single breakpoint with GDB?
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4 Answers
4
Active
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What does tilde-greater-than (~>) mean in Ruby gem dependencies? [duplicate]
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4 Answers
4
Active
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Best way to strip punctuation from a string
...imeit(1000000)
This gives the following results:
sets : 19.8566138744
regex : 6.86155414581
translate : 2.12455511093
replace : 28.4436721802
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How to implement a good __hash__ function in python [duplicate]
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edited Sep 20 '12 at 11:34
Fred Foo
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answer...
Check whether an array is a subset of another
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answered Dec 2 '08 at 4:12
Cameron MacFarlandCameron MacFarland
63.2k1919 gold badges9898 silver badges128128 bronze badges
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How to find the statistical mode?
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413
One more solution, which works for both numeric & character/factor data:
Mode <- funct...