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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...r2开发拓展(Extension)
中文网拓展
【实时音视频】AgoraRTC 自研拓展：App Inventor 2 实时语音与视频通话
【BaaS】 CloudBase 自研拓展：App接入腾讯云 BaaS（Backend as a Service，后端即服务）
【BaaS】 Supabase 自研拓展...
How to find the foreach index?
... edited Dec 14 '17 at 3:16
buræquete
12.5k44 gold badges3131 silver badges6262 bronze badges
answered Sep 26 '08 at 18:25
...
Extract first item of each sublist
...t numpy-way, transforming the array:
%timeit list(np.array(lst).T[0])
4.9 µs ± 163 ns per loop (mean ± std. dev. of 7 runs, 100000 loops each)
Fully native using list comprehension (as explained by @alecxe):
%timeit [item[0] for item in lst]
379 ns ± 23.1 ns per loop (mean ± std. dev. of 7 ...
ContinuousSpeech 连续语音识别扩展：持续语音识别无需重复启动 · App Inventor 2 中文网
...音干扰
连续识别：自动重启识别器实现持续语音识别
实时反馈：通过 OnPartialResult 事件提供实时中间识别结果
语言支持：支持设置不同的识别语言
下载
.aix拓展文件：
de.ullisroboterseite.ursai2continuousspeech.a...
Port 80 is being used by SYSTEM (PID 4), what is that?
...
the IP adress is 0.0.0.0, state = LISTENING: means that port 80 is listening to all interfaces (not used)
How to read NETSTAT -AN results:
https://sites.google.com/site/xiangyangsite/home/technical-tips/linux-unix/networks-rel...
UnicodeDecodeError when redirecting to file
...n when redirected to a file.
#coding: utf8
import sys
uni = u'αßΓπΣσµτΦΘΩδ∞φ'
print >>sys.stderr,sys.stdout.encoding
print uni
Output (run directly from terminal)
cp437
αßΓπΣσµτΦΘΩδ∞φ
Python correctly determined the encoding of the terminal.
Output (redirec...
Pandas - Get first row value of a given column
...ter than using .iloc:
In [1]: %timeit -n 1000 df['Btime'].values[20]
5.82 µs ± 142 ns per loop (mean ± std. dev. of 7 runs, 1000 loops each)
In [2]: %timeit -n 1000 df['Btime'].iloc[20]
29.2 µs ± 1.28 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
...
How to add a button to UINavigationBar?
...red Mar 23 '10 at 23:45
Mads MobækMads Mobæk
29.5k2020 gold badges6464 silver badges7575 bronze badges
...
Pandas conditional creation of a series/dataframe column
...map( lambda x: 'red' if x == 'Z' else 'green')
1000 loops, best of 3: 239 µs per loop
1000 loops, best of 3: 523 µs per loop
1000 loops, best of 3: 263 µs per loop
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...
Getting a map() to return a list in Python 3.x
...imeit -r5 ordinals = list(range(45))
... list(map(chr, ordinals))
...
3.91 µs ± 60.2 ns per loop (mean ± std. dev. of 5 runs, 100000 loops each)
>>> %%timeit -r5 ordinals = list(range(45))
... [*map(chr, ordinals)]
...
3.84 µs ± 219 ns per loop (mean ± std. dev. of 5 runs, 100000 loo...