大约有 21,000 项符合查询结果（耗时：0.0307秒） [XML]
Pandas every nth row
...y 3rd row starting from 0
df2 = df[df.index % 3 == 0] # Selects every 3rd raw starting from 0
This arithmetic based sampling has the ability to enable even more complex row-selections.
This assumes, of course, that you have an index column of ordered, consecutive, integers starting at 0.
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Hosting a Maven repository on github
...>
<url>https://github.com/YOUR-USERNAME/YOUR-PROJECT-NAME/raw/mvn-repo/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
</snapshots>
</repository>
</repositor...
Need to remove href values when printing in Chrome
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Docker - a way to give access to a host USB or serial device?
...fe as it maps all the devices from your host into the container, including raw disk devices and so forth. Basically this allows the container to gain root on the host, which is usually not what you want.
Using the cgroups approach is better in that respect and works on devices that get added after t...
Arrays vs Vectors: Introductory Similarities and Differences [closed]
...'ll probably start using arrays when interfacing with API's that deal with raw arrays, or when building your own collections.
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How to convert a std::string to const char* or char*?
...o
Simple
Stack memory handling
Cons
Static
Requires string copy
4. Raw memory allocation with automatic storage deletion
std::string foo{ "text" };
auto p = std::make_unique<char[]>(foo.size()+1u);
std::copy(foo.data(), foo.data() + foo.size() + 1u, &p[0]);
Pro
Small memory fo...
Insert a line break in mailto body
...note: If you're constructing the link with ES6/ES2015 string templates the raw code (%0D%0A) works just fine.
– Adam Simpson
Apr 18 '16 at 16:00
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Install Node.js on Ubuntu
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wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.19.0/install.sh | bash
nvm install v0.10.33
just use nvm for node version control nvm
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adb command not found
...ide automatic updates.
install homebrew
ruby -e "$(curl -fsSL
https://raw.githubusercontent.com/Homebrew/install/master/install)"
Install adb
brew cask install android-platform-tools
Start using adb
adb devices
sh...