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App Inventor 2 使用 MaterialIcons 图标字体，快捷展示专业图标 · App Inventor 2 中文网
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App Inventor 2 怎么修改app图标？ · App Inventor 2 中文网
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App Inventor 2 BaiduFanyi拓展：请求百度翻译WebAPI方式的拓展 · App Inventor 2 中文网
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App Inventor 2 “虚拟”屏幕：同一屏幕展示多屏内容，模拟切换屏幕 · App...
... 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 “虚拟”屏幕：同...
mongodb group values by multiple fields
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207
TLDR Summary
In modern MongoDB releases you can brute force this with $slice just off the bas...
Find all packages installed with easy_install/pip?
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edited Nov 2 '17 at 13:31
TheodorosPloumis
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How to read a large file - line by line?
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1288
The correct, fully Pythonic way to read a file is the following:
with open(...) as f:
for...
Warning: push.default is unset; its implicit value is changing in Git 2.0
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2154
It's explained in great detail in the docs, but I'll try to summarize:
matching means git p...
R: Comment out block of code [duplicate]
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92
Most of the editors take some kind of shortcut to comment out blocks of code. The default edito...
Scala @ operator
...variable. Consider the following, for instance:
val o: Option[Int] = Some(2)
You can easily extract the content:
o match {
case Some(x) => println(x)
case None =>
}
But what if you wanted not the content of Some, but the option itself? That would be accomplished with this:
o match {...