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Getting distance between two points based on latitude/longitude
...0
lat1 = radians(52.2296756)
lon1 = radians(21.0122287)
lat2 = radians(52.406374)
lon2 = radians(16.9251681)
dlon = lon2 - lon1
dlat = lat2 - lat1
a = sin(dlat / 2)**2 + cos(lat1) * cos(lat2) * sin(dlon / 2)**2
c = 2 * atan2(sqrt(a), sqrt(1 - a))
distance = R * c
print("Result:", distance)
prin...
How do I split a string so I can access item x?
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44 Answers
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RVM is not a function, selecting rubies with 'rvm use …' will not work
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243
Your console is not running as a login shell and hence have no access to rvm function. If you a...
SELECT DISTINCT on one column
...er = 1
– Andre Nel
Jun 21 '17 at 11:46
This works although it's not a CTE ( ;WITH CTE ...... ) . more of a sub query w...
Why do we need break after case statements?
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Sometimes it is helpful to have multiple cases associated with the same code block, such as
cas...
Check if something is (not) in a list in Python
...e in your code, because it should work fine:
>>> 3 not in [2, 3, 4]
False
>>> 3 not in [4, 5, 6]
True
Or with tuples:
>>> (2, 3) not in [(2, 3), (5, 6), (9, 1)]
False
>>> (2, 3) not in [(2, 7), (7, 3), "hi"]
True
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布局列表框使用指导 · App Inventor 2 中文网
...了解界面和模板
第 3 步：完整代码块
第 4 步：按表专项测试
常见问题
工程校验与下一步
使用示例
手动设置行组件
事件处理
追加数据与滚动
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Regular expression for first and last name
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edited Feb 17 '14 at 9:57
John Smith
47855 silver badges1818 bronze badges
answered Mar 5 '10 ...
ImageView 扩展：图片查看器扩展，支持缩放、双击缩放和动画缩放 · App In...
...片浏览器
2. 产品展示
3. 地图查看
4. 图片编辑器
5. 相册应用
使用说明
基本设置步骤
重要提示
性能优化建议
技术说明
手...
Cocoa Touch: How To Change UIView's Border Color And Thickness?
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