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MIT官方已升级至2.73版本，中文网待测试并升级相关特性 - App Inventor 2 ...
...版本重点更新 Android Companion 应用及其底层框架。新版本 2.73 现已可从 Google Play 商店和 ai2.appinventor.mit.edu（版本 2.73u）直接下载。
更改：
为 ListView 组件实现“提示”属性，并全面提高其性能。
在 ChatBot 组件中添加下拉菜...
App Inventor 2 ECharts 拓展：基于 ECharts 强大的个性化数据图表展示 · ...
... 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 ECharts 拓展：基于 ECharts ...
【免费开放】App Inventor 2 LLMAI2Ext 自研拓展：接入DeepSeek、Kimi、通...
最新aix拓展永久下载地址：https://www.fun123.cn/reference/extensions/LLMAI2Ext.html
中文网开发国内大模型拓展的初衷 App Inventor 2 原生的ChatGPT组件由于是国外的，使用起来不太便捷，且各种限制。如今我们又身处AI浪潮之中，包括很多...
Why does Math.round(0.49999999999999994) return 1?
....1 This is a specification bug, for precisely this one pathological case.2 Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(double d) {
System.out.printf("%016x\n", Double.doubleToLongBits(d));
}
...
Why does ~True result in -2?
...
240
int(True) is 1.
1 is:
00000001
and ~1 is:
11111110
Which is -2 in Two's complement1
1 ...
Aggregate / summarize multiple variables per group (e.g. sum, mean)
...
Where is this year() function from?
You could also use the reshape2 package for this task:
require(reshape2)
df_melt <- melt(df1, id = c("date", "year", "month"))
dcast(df_melt, year + month ~ variable, sum)
# year month x1 x2
1 2000 1 -80.83405 -224.9540159
2 ...
How to extract the n-th elements from a list of tuples?
... |
edited Mar 6 '19 at 20:33
cs95
231k6060 gold badges391391 silver badges456456 bronze badges
answer...
Centering controls within a form in .NET (Winforms)? [duplicate]
...
254
You could achieve this with the use of anchors. Or more precisely the non use of them.
Contr...
How do you test that a Python function throws an exception?
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724
Use TestCase.assertRaises (or TestCase.failUnlessRaises) from the unittest module, for example:...
How to escape braces (curly brackets) in a format string in .NET
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1295
For you to output foo {1, 2, 3} you have to do something like:
string t = "1, 2, 3";
string v...