大约有 44,700 项符合查询结果（耗时：0.0402秒） [XML]
App Inventor 2 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录...
... 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 App Inventor 2 FTP 客户端拓展：FTP...
Python Infinity - Any caveats?
... not get an inf value through usual arithmetic calculations:
>>> 2.0**2
4.0
>>> _**2
16.0
>>> _**2
256.0
>>> _**2
65536.0
>>> _**2
4294967296.0
>>> _**2
1.8446744073709552e+19
>>> _**2
3.4028236692093846e+38
>>> _**2
1.15792089...
Android: upgrading DB version and adding new table
...
281
1. About onCreate() and onUpgrade()
onCreate(..) is called whenever the app is freshly instal...
Implement touch using Python?
...
325
Looks like this is new as of Python 3.4 - pathlib.
from pathlib import Path
Path('path/to/fil...
What is a regular expression which will match a valid domain name without a subdomain?
...
20 Answers
20
Active
...
Popup弹出菜单扩展 · App Inventor 2 中文网
... 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...
In Clojure, when should I use a vector over a list, and the other way around?
...
112
Once again, it seems I've answered my own question by getting impatient and asking it in #clojur...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...当你把他的源码下下来编译后，你会发现解释器居然不到200k，这是多么地变态啊（/bin/sh都要1M，MacOS平台），而且能和C语言非常好的互动。我很好奇得浏览了一下Lua解释器的源码，这可能是我看过最干净的C的源码了。我不想写...
Update value of a nested dictionary of varying depth
...
24 Answers
24
Active
...
Pandas conditional creation of a series/dataframe column
...
print(df)
yields
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == 'A')
otherwise blue when (df['Set'] ...