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Python assigning multiple variables to same value? list behavior
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274
If you're coming to Python from a language in the C/Java/etc. family, it may help you to stop ...
How to download Xcode DMG or XIP file?
...ion (6.3, 5.1, etc.) only the latest revision is kept in the list.)
Xcode 12
12.2 beta
12 (Requires macOS 10.15.4 or later) (Latest as of 17-Sept-2020)
Xcode 11
11.7 (Latest as of Sept 02 2020)
11.6
11.5
11.4.1 (Requires macOS 10.15.2 or later)
11.3.1
11.2.1
11.1
11 (Requires macOS 10.1...
App Inventor 2 语音交互机器人Robot，使用讯飞语音识别引擎 - App Invento...
App Inventor 2 语音交互机器人Robot，使用讯飞语音识别引擎ai2_robotApp Inventor 2 语音识别及交互App。识别语言指令并控制机器人运动，主要用到语音识别器及文本朗读器组件，语音识别相关开发最佳入门。代码逻辑简单，App交互性及...
App Inventor 2 中文网支持OpenAI的ChatGPT对话及AI绘图（AI伴侣2.67及以上...
App Inventor 2 中文网已经升级ChatBot及ImageBot组件。
App Inventor 2 参考文档 · App Inventor 2 中文网
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App Inventor 2 参考文档
App Inventor 2 参考文档分为以下几大类：内置块参考文档、组件参考文档、拓展参考文档、概念参考文档、其他技术文档及App Inve...
App Inventor 2 蓝牙BLE扩展源码分析 - WriteBytes vs WriteStrings 23字节...
... 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 ...
How to map and remove nil values in Ruby
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27
Ruby 2.7+
There is now!
Ruby 2.7 is introducing filter_map for this exact purpose. It's idiom...
How can I do an asc and desc sort using underscore.js?
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You can use .sortBy, it will always return an ascending list:
_.sortBy([2, 3, 1], function(num) {
return num;
}); // [1, 2, 3]
But you can use the .reverse method to get it descending:
var array = _.sortBy([2, 3, 1], function(num) {
return num;
});
console.log(array); // [1, 2, 3]
con...
Why does changing 0.1f to 0 slow down performance by 10x?
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1627
Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!!
De...
Omitting the second expression when using the if-else shorthand
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269
This is also an option:
x==2 && dosomething();
dosomething() will only be called if...