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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
... 【Socket】 ClientSocketAI2Ext 拓展加强版：TCP/IP传输协议
【FTP】 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录等
【短信平台接入】 AliSms 拓展：阿里云短信平台接入，短信验证码
【设备信息】 PhoneInfo 拓展：获取...
What is the difference between 'E', 'T', and '?' for Java generics?
...s the type for a scope, the wildcard does not: the wildcard just defines a set of allowable types that you can use for a generic type. Without any bounding (extends or super), the wildcard means "use any type here".
The wildcard always come between angle brackets, and it only has meaning in the con...
How to create a density plot in matplotlib?
...g with editing comments) Here is a subclass of gaussian_kde that allows to set the bandwidth as an argument and more examples: mail.scipy.org/pipermail/scipy-user/2010-January/023877.html and there is an enhancement ticket at projects.scipy.org/scipy/ticket/1092 . Note, gaussian_kde is designed for ...
EF Code First foreign key without navigation property
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I think you also just set an attribute on the entity, so on parent id, just add [ForeignKey("ParentTableName")]. That will link the property to whatever the key is on the parent table. Now you've got a hard-coded table name though.
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git log of a single revision
I have a commit c. I want to get the changeset of that exact commit c + metainformation and no other one. Is there a simpler way than git log -p c^..c to do that?
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Get name of property as a string
(See below solution I created using the answer I accepted)
13 Answers
13
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How to create JSON string in JavaScript?
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Definitely: don't settle for this answer and look to the others.
– AsTeR
Aug 26 '16 at 14:04
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How to listen for changes to a MongoDB collection?
...some tricks. The key here is the oplog.
When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this op...
What is the Windows equivalent of the diff command?
...r linux commands that you can use from the windows command line.
You can set the PATH variable by right clicking on Computer and selecting Properties. Then you can click on Advanced System Settings on the left side of the screen. In the pop up, click Environment Variables and then either add or up...
Running a cron job at 2:30 AM everyday
... * wget https://www.yoursite.com/your_function_name
The first part is for setting cron job and the next part to call your function.
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