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What do these words mean in Git: Repository, fork, branch, clone, track?
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What does [:] mean?
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edited Jun 24 at 20:38
answered May 29 '11 at 10:42
S...
How to replace NaN values by Zeroes in a column of a Pandas Dataframe?
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In [7]: df
Out[7]:
0 1
0 NaN NaN
1 -0.494375 0.570994
2 NaN NaN
3 1.876360 -0.229738
4 NaN NaN
In [8]: df.fillna(0)
Out[8]:
0 1
0 0.000000 0.000000
1 -0.494375 0.570994
2 0.000000 0.000000
3 1.876360 -0.229738
4 0...
What's the difference of strings within single or double quotes in groovy?
...r is worth reading (esp. the part about GStrings not being Strings about 2/3 of the way down.
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Manually raising (throwing) an exception in Python
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How do I manually throw/raise an exception in Python?
Use the most specific Exception co...
MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...一半，如果已经小于一半了所有节点保持只读状态。
3 搭建副本集集群
每个虚拟机都使用如下的配置文件启动实例:
dbpath =/home/lihuilin/mongodata
smallfiles =true
replSet =mvbox
然后在任意一台虚拟机登陆mongo,输入如下...
Difference between pre-increment and post-increment in a loop?
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239
a++ is known as postfix.
add 1 to a, returns the old value.
++a is known as prefix.
add 1 t...
Rails :dependent => :destroy VS :dependent => :delete_all
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Michael Brawn
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answered May 9 '10 at 10:36
shingarashingara
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R programming: How do I get Euler's number?
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How do I include related model fields using Django Rest Framework?
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