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AI2Utils 拓展：一些常用的小功能集合 · App Inventor 2 中文网
...top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
FlashLight 拓展：打开/关闭手机手电筒/闪光灯 · App Inventor 2 中文网
...top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
Screenshot 拓展：截取手机屏幕 · App Inventor 2 中文网
...top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
App Inventor 2 ColorSeekbar 扩展：水平颜色选择条 · App Inventor 2 中文网
...初始化视图(component)
初始化颜色选择条视图。传入一个 AndroidViewComponent（垂直/水平布局组件）作为容器，颜色选择条将显示在该容器中。
事件
OnColorChange颜色改变时(color)
当用户在颜色选择条上滑动选择...
MultiImagePicker 拓展：图片单选/多选扩展 · App Inventor 2 中文网
...top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
App Inventor 2 CirculBar 扩展：在图像组件上绘制自定义圆形进度条 · App Inventor 2 中文网
...top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
App Inventor 2 数据库方案对比 · App Inventor 2 中文网
...、云函数、MySQL、文档数据库代理和云存储，理念接近 LeanDB，可作为 LeanDB 停服后的迁移目标。
中大型网络数据及文件存储
Supabase
拓展
云端（海外）
支持
接入 Supabase 后端服务（Auth + PostgreSQL...
Remove scrollbar from iframe
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Thanks, but horizontal scroll only and still shows up in Firefox. Doesn't show up in Chrome nor IE. Also, CSS for scrollbar gets applied effectively only in IE, not FF nor Chrome (latter show default looking beige color/shades).
– Faith I...
What is copy-on-write?
I would like to know what copy-on-write is and what it is used for? The term 'copy-on-write array' is mentioned several times in the Sun JDK tutorials but I didn't understand what it meant.
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Opposite of %in%: exclude rows with values specified in a vector
... to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
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