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Converting string to numeric [duplicate]
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132
I suspect you are having a problem with factors. For example,
> x = factor(4:8)
> x
[1]...
C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区，为创新赋能！
...代码：
int main(int argc, char** argv)
{
int a[5] = {1,2,3,4,5};
int* ptr = (int*)(&a + 1);
printf("%d,%d\n", *(a+1), *(ptr-1));
return 0;
}复制代码这道题在很多所谓经典C语言面试题里是常见的不能再常...
Make XAMPP/Apache serve file outside of htdocs [closed]
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365
Ok, per pix0r's, Sparks' and Dave's answers it looks like there are three ways to do this:
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How to open a URL in a new Tab using JavaScript or jQuery? [duplicate]
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453
Use window.open():
var win = window.open('http://stackoverflow.com/', '_blank');
if (win) {
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Is there a way to keep Hudson / Jenkins configuration files in source control?
... support for more repositories is planned. I am using it since version 0.0.3 and it worked good so far.
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Simple example of threading in C++
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user276648
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answered Jun 27 '12 at 15:31
MasterMasticMasterM...
How to count TRUE values in a logical vector
...m(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing returns values)
So I think the safest is to use na.rm = TRUE:
sum(z, na.rm = TRUE) # best way to count TRUE values
(which gives 1). I think that table solution is less effici...
What is the difference between graph search and tree search?
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edited May 24 '19 at 9:33
answered Mar 7 '13 at 20:50
zi...
CSV in Python adding an extra carriage return, on Windows
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325
Python 3:
As described by YiboYang, set newline=''
with open('output.csv', 'w', newline=''...
How to make --no-ri --no-rdoc the default for gem install?
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1230
You just add the following line to your local ~/.gemrc file (it is in your home folder):
gem: ...