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Find Oracle JDBC driver in Maven repository
...pId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.3.0</version>
...and the URL to download the file which in this case is
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/index.html.
Once you've downloaded the JAR just add it to your computer repository...
Why does Assert.AreEqual(T obj1, Tobj2) fail with identical byte arrays
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139
Assert.Equals tests using the Equals method, which by default uses reference equality and, sinc...
Why does parseInt yield NaN with Array#map?
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483
The callback function in Array.map has three parameters:
From the same Mozilla page that you li...
How to calculate the angle between a line and the horizontal axis?
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388
First find the difference between the start point and the end point (here, this is more of a d...
Check substring exists in a string in C
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answered Oct 8 '12 at 15:30
nneonneonneonneo
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How do I find out if first character of a string is a number?
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edited Oct 2 '12 at 14:13
answered Aug 3 '09 at 15:43
Mic...
How to base64 encode image in linux bash / shell
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answered Jun 4 '13 at 13:09
chepnerchepner
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Format date and time in a Windows batch script
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33 Answers
33
Active
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ValueError: math domain error
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134
Your code is doing a log of a number that is less than or equal to zero. That's mathematically ...
Relative frequencies / proportions with dplyr
...()) %>%
mutate(freq = n / sum(n))
# am gear n freq
# 1 0 3 15 0.7894737
# 2 0 4 4 0.2105263
# 3 1 4 8 0.6153846
# 4 1 5 5 0.3846154
From the dplyr vignette:
When you group by multiple variables, each summary peels off one level of the grouping. That makes it ea...