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What is the difference between NaN and None?
I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
How do I activate a virtualenv inside PyCharm's terminal?
..."export ~/.bashrc" before this script.
– Raphaël Gomès
Jul 29 '16 at 10:00
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How can I download a specific Maven artifact in one command line?
... and I didn't touch the pluginRegistry. Thanks.
– Xiè Jìléi
Dec 14 '09 at 4:27
2
this "get" g...
Select first 4 rows of a data.frame in R
...we have the following dataset with 15 rows
>data <- data <- read.csv("./data.csv", sep = ";", header=TRUE)
>data
LungCap Age Height Smoke Gender Caesarean
1 6.475 6 62.1 no male no
2 10.125 18 74.7 yes female no
3 9.550 16 69.7 no female ...
Run a string as a command within a Bash script
...lude server::team_l_start = ${teamAComm} server::team_r_start=${teamBComm} CSVSaver::save='true' CSVSaver::filename = 'out.csv'
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How to determine the encoding of text?
... binary mode, i.e. open("filename.txt", "rb").
– L. Kärkkäinen
Jul 15 '19 at 4:34
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What causes java.lang.IncompatibleClassChangeError?
...a-based APIs 2: Achieving API Binary Compatibility" written by Jim des Rivières.
There are also some automatic tools to detect such changes:
japi-compliance-checker
clirr
japitools
sigtest
japi-checker
Usage of japi-compliance-checker for your library:
japi-compliance-checker OLD.jar NEW.jar
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HTTP 401 - what's an appropriate WWW-Authenticate header value?
... answered Nov 17 '09 at 12:07
Pär WieslanderPär Wieslander
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如何编写一个独立的 PHP 扩展（译） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...工具
想要扩展能够在系统上编译并成功运行，需要准备转以下工具：
GNU autoconf
GNU automake
GNU libtool
GNU m4
以上这些都可以从 ftp://ftp.gnu.org/pub/gnu/ 获取。
注：以上这些都是类 Unix 环境下才能使用的工具。
改装一个已经存...
format statement in a string resource file
...wered Mar 14 '16 at 11:04
Timo BährTimo Bähr
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