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【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
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实现电子围栏需要的组件实现电子围栏需要用到地图Map容器，需要用到的组件有Map，类似画面，用于放置其他地图特征组件。根据围栏的形状可以用的组件有Circle（圆形），Polygon（多边形），Rectangle（矩形）。我这里用了Ci...
Convert a Map to a POJO
I've been looking at Jackson, but is seems I would have to convert the Map to JSON, and then the resulting JSON to the POJO.
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Merging dictionaries in C#
What's the best way to merge 2 or more dictionaries ( Dictionary<T1,T2> ) in C#?
(3.0 features like LINQ are fine).
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Get most recent file in a directory on Linux
Looking for a command that will return the single most recent file in a directory.
21 Answers
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Global Git ignore
...s git bash:
git config --global core.excludesFile '~/.gitignore'
Windows cmd:
git config --global core.excludesFile "%USERPROFILE%\.gitignore"
Windows PowerShell:
git config --global core.excludesFile "$Env:USERPROFILE\.gitignore"
For Windows it set to the location C:\Users\{myusername}\.gitignor...
How to set timeout for http.Get() requests in Golang?
I'm making a URL fetcher in Go and have a list of URLs to fetch. I send http.Get() requests to each URL and obtain their response.
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Long press gesture on UICollectionViewCell
... gesture recognizer to a (subclass of) UICollectionView. I read in the documentation that it is added by default, but I can't figure out how.
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Displaying a message in iOS which has the same functionality as Toast in Android
I need to know if there is any method in iOS which behaves like Toast messages in Android. That is, I need to display a message which is dismissed automatically after few seconds. This is similar to the functionality of the Toast class in the Android environment.
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Is there Unicode glyph Symbol to represent “Search” [closed]
Unicode has a million icon-like glyphs, but they're very hard to search.
5 Answers
5
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How to round an average to 2 decimal places in PostgreSQL?
I am using PostgreSQL via the Ruby gem 'sequel'.
8 Answers
8
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