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app inventor 2 怎么进行延迟操作？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
app inventor 2 怎么进行延迟操作？https://www.fun123.cn/reference/creative/sim_sleep.html
App Inventor 2 模拟sleep函数 App Inventor 2 原生没有 sleep 及相关函数，需要模拟实现，经过测试这里给出一个既简单又相对高效率的实现方案：需要用到计时...
How to initialise a string from NSData in Swift
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This is how you should initialize the NSString:
Swift 2.X or older
let datastring = NSString...
水果vs蔬菜智能分类器 - EdgeML图像识别项目 · App Inventor 2 中文网
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Determine a string's encoding in C#
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devdimidevdimi
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undefined reference to `WinMain@16'
... objdump -x a.exe | findstr /i "^subsystem"
Subsystem 00000002 (Windows GUI)
C:\test> _
Hopefully that's OK so far, although the -mwindows flag is just semi-documented.
Building without that semi-documented flag one would have to more specifically tell the linker which su...
Why is it said that “HTTP is a stateless protocol”?
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edited Nov 2 '12 at 17:37
answered Nov 2 '12 at 17:24
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clang error: unknown argument: '-mno-fused-madd' (python package installation failure)
I get the following error when attempting to install psycopg2 via pip on Mavericks 10.9:
14 Answers
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Converting camel case to underscore case in ruby
... underscore
self.gsub(/::/, '/').
gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
gsub(/([a-z\d])([A-Z])/,'\1_\2').
tr("-", "_").
downcase
end
end
Then you can do fun stuff:
"CamelCase".underscore
=> "camel_case"
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Strange out of memory issue while loading an image to a Bitmap object
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How to convert latitude or longitude to meters?
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Here is a javascript function:
function measure(lat1, lon1, lat2, lon2){ // generally used geo measurement function
var R = 6378.137; // Radius of earth in KM
var dLat = lat2 * Math.PI / 180 - lat1 * Math.PI / 180;
var dLon = lon2 * Math.PI / 180 - lon1 * Math.PI / 180;
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