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What's the difference between `=` and `
I'm using R 2.8.1 and it is possible to use both = and <- as variable assignment operators. What's the difference between them? Which one should I use?
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What do numbers using 0x notation mean?
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Literals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
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Complex numbers usage in python [closed]
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2 Answers
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Installed Ruby 1.9.3 with RVM but command line doesn't show ruby -v
...find you need some hand-holding, take a look at Installing Ruby on Ubuntu 12.04, which gives a bit more explanation.
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Get the first element of each tuple in a list in Python [duplicate]
...[x[0] for x in rows]
Below is a demonstration:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
Alternately, you could use unpacking instead of x[0]:
res_list = [x for x,_ in rows]
Below is a demonstration:
>>> lst = [(1, 2), (...
MFC CSplitterWnd的用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...1.在框架类（CMainFrame）中定义一个CSplitterWnd成员；
2.重载父框架类中CFrameWnd::OnCreateClient函数；
3.在OnCreateClient（）函数中调用CSplitterWnd类的Create或CreateStatic（）函数；
例子：
CSplitterWnd m_wndSplitter;
BOOL CChildFrame::OnC...
Python Charts库(Highcharts API的封装) - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ort charts
Server running in the folder /Users/TiM/PycharmProjects/58 at 127.0.0.1:61664 这个目录是你当前目录
如果报错,则需要
import sys
print(sys.path)
找到类似下面的路径
'/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages'
然后进入目...
App Inventor 2分享你的App：源代码(.aia)分享或编译成安卓安装包(.apk)分...
...到或下载.aia源码文件后，导入自己的账户，如图：
2、编译成安卓安装包(.apk)分享
将项目编译成安卓平台直接可以安装使用的.apk安装包，操作方法如下：
编译中
然后就可以将.apk安装包分享给他人或上传到网站，...
2023年2月2日签到记录贴 - 灌水吐槽、新手试贴 - 清泛IT论坛，有思想、有深度
...动生成的,如果您还未签到,请点此进行签到的操作. 我在 2023-02-02 08:35 完成签到,是今天第一个签到的用户,获得随机奖励 小红花 2,另外我还额外获得了 小红花 10.我今天最想说:「哈哈哈哈」.
App Inventor 2能编译出苹果iOS版App吗？ - App Inventor 2 中文网 - 清泛I...
...难之处：
1、基础设施还没有准备好，尚未达到预期。
2、iOS构建仍然存在bug。
3、iOS构建可能需要收费。
参考官方社区：https://community.appinventor.mi ... s-from-github/75336