大约有 35,450 项符合查询结果（耗时：0.0607秒） [XML]
How can I divide two integers to get a double?
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answered Mar 19 '09 at 4:14
NoahDNoahD
7,02244 gold badges2222 silver badges2828 bronze badges
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How to combine multiple conditions to subset a data-frame using “OR”?
... it is to be handled as I intended, since ...
> NA & 1
[1] NA
> 0 & NA
[1] FALSE
Order of arguments may matter when using '&".
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Java `final` method: what does it promise?
...ss is a good example.
public class Counter {
private int counter = 0;
public final int count() {
return counter++;
}
public final int reset() {
return (counter = 0);
}
}
If the public final int count() method is not final, we can do something like this:
C...
How to “re-run with -deprecation for details” in sbt?
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edited Mar 13 '19 at 10:16
Jacek Laskowski
61.1k2020 gold badges187187 silver badges343343 bronze badges
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How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...k of the indices:
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
numpy.random.shuffle(x)
training, test = x[:80,:], x[80:,:]
or
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
indices = numpy.random.permutation(x.shape[0])
training_idx, test_idx = indices[:80], ind...
Return positions of a regex match() in Javascript?
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answered Feb 19 '10 at 10:49
GumboGumbo
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String replacement in Objective-C
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edited Mar 20 '09 at 22:45
answered Mar 20 '09 at 22:39
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Encoding Javascript Object to Json string
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Dave WardDave Ward
56k1010 gold badges114114 silver badges134134 bronze badges
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Repeatedly run a shell command until it fails?
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edited Nov 8 '19 at 0:10
Gurpreet Atwal
7366 bronze badges
answered Oct 19 '12 at 4:09
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Does MySQL foreign_key_checks affect the entire database?
..." for scope. This means it can be set for session:
SET FOREIGN_KEY_CHECKS=0;
or globally:
SET GLOBAL FOREIGN_KEY_CHECKS=0;
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