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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！
...地图中心Set the initial center coordinate of the map. The value is specified as a comma-separated pair of decimal latitude and longitude coordinates, for example, 42.359144, -71.093612.In blocks code, it is recommended for performance reasons to use PanTo with numerical latitude and longitude ra...
What does “atomic” mean in programming?
... So this is assuming that it is running in a 32-bit system. What if it was 64 bit system? Will foo = 65465498L; be atomic then?
– Harke
Dec 24 '13 at 20:36
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Get most recent file in a directory on Linux
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ls -t | head -n1
This command actually gives the latest modified file in the current working directory.
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Difference between getDefaultSharedPreferences and getSharedPreferences
What is the difference between getDefaultSharedPreferences and getSharedPreferences in Android? Can anyone please explain?
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Global Git ignore
...indows it set to the location C:\Users\{myusername}\.gitignore. You can verify that the config value is correct by doing:
git config --global core.excludesFile
The result should be the expanded path to your user profile's .gitignore. Ensure that the value does not contain the unexpanded %USERPROFIL...
How to get next/previous record in MySQL?
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This is not solution because if you remove row from "foo", what will happen? :P
– Valentin Hristov
Feb 24 '14 at 8:36
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How can I get the actual stored procedure line number from an error message?
...orrelation to the line numbers in the stored procedure. I assume that the difference is due to white space and comments, but is it really?
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CSS: Setting width/height as Percentage minus pixels
... post, but given that it hasn't been suggested it is worth mentioning that if you are writing for CSS3-compliant browsers, you can use calc:
height: calc(100% - 18px);
It's worth it to note that not all browsers currently support the standard CSS3 calc() function, so implementing the browser sp...
How to clear a notification in Android
Is it possible to clear a notification programatically?
14 Answers
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ng-app vs. data-ng-app, what is the difference?
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Good question. The difference is simple - there is absolutely no difference between the two except that certain HTML5 validators will throw an error on a property like ng-app, but they don't throw an error for anything prefixed with data-, like ...