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How to determine the number of days in a month in SQL Server?
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You can use the following with the first day of the specified month:
datediff(day, @date, dat...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
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13 Answers
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Convert columns to string in Pandas
...will convert keys to valid json (and therefore your keys to strings):
In [11]: df = pd.DataFrame([['A', 2], ['A', 4], ['B', 6]])
In [12]: df.to_json()
Out[12]: '{"0":{"0":"A","1":"A","2":"B"},"1":{"0":2,"1":4,"2":6}}'
In [13]: df[0].to_json()
Out[13]: '{"0":"A","1":"A","2":"B"}'
Note: you can p...
Code Golf: Lasers
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Perl, 166 160 characters
Perl, 251 248 246 222 214 208 203 201 193 190 180 176 173 170 166 --> 160 chars.
Solution had 166 strokes when this contest ended, but A. Rex has found a couple ways to shave off 6 more characters:
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Why is January month 0 in Java Calendar?
In java.util.Calendar , January is defined as month 0, not month 1. Is there any specific reason to that ?
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Sorting list based on values from another list?
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15 Answers
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append to url and refresh page
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this should work (not tested!)
var url = window.location.href;
if (url.indexOf('?') > ...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
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FooInterface的析构函数~FooInterface()必须是virtual的
在第13行，我们得把getArbitraryString定义为纯虚函数。其实getArbitraryString()也不一定得是纯虚函数，这点我们后面会提到.
现在我们用Google Mock来定义Mock类 FooMock.h
#ifndef MO...
Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?
... see many different Java terms floating around. I need to install the JDK 1.6. It was my understanding that Java 6 == Java 1.6. However, when I install Java SE 6, I get a JVM that reports as version 11.0! Who can solve the madness?
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