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Google App Engine: Is it possible to do a Gql LIKE query?
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BigTable, which is the database back end for App Engine, will scale to millions of records. Due to this, App Engine will not allow you to do any query that will result in a table scan, as performance would be dreadful for a well populated table.
In other words, every q...
Get a filtered list of files in a directory
...osed to os.listdir just returning the file name. At least this is what is happening in Python 2.
– k427h1c
May 1 '19 at 19:41
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The current SynchronizationContext may not be used as a TaskScheduler
...and doesn't actually continue on the same thread.
– Sapph
Apr 9 '16 at 21:29
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BLE（三）APP开发步骤 - 创客硬件开发 - 清泛IT社区，为创新赋能！
文章源自：https://www.gandalf.site/2018/11/bleapp.html
Android系统自4.3版本开始，引入了对BLE的支持，详见Bluetooth Low Energy。通过浏览当中的信息，我们可以得知在app开发环节，需要做到如下几件事情：
1. BLE相关权限声明
2. 操...
Convert Time from one time zone to another in Rails
...built into Rails, but is not part of the Ruby stdlib. If you have a rails app, no problem. If you have a straight Ruby app you'll need to be sure to require active support.
– Gayle
Jan 8 '13 at 15:58
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云数据及Firebase组件简介 · App Inventor 2 中文网
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云数...
云数据及Firebase组件简介 · App Inventor 2 中文网
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云数据及Firebase组件简介 · App Inventor 2 中文网
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云数据及Firebase组件简介 · App Inventor 2 中文网
创建 Apps 首页 关于我们 关于我们 发布日志 服务条款 教育 中文教程 中文社区 反馈 我要反馈
云数...
Image, saved to sdcard, doesn't appear in Android's Gallery app
I save an image to the sdcard and it doesn't appear in the Gallery application until I pull off the sdcard and return it back.
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