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How to record webcam and audio using webRTC and a server-based Peer connection
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You should definitely have a look at Kurento. It provides a WebRTC server infrastructure that allows you to record from a WebRTC feed and much more. You can also find some examples for the application you are planning here. It is really easy to add recording capabilities to tha...
How to sort with lambda in Python
...reverse=False)
so without the key=, the function you pass in will be considered a cmp function which takes 2 arguments.
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How to make join queries using Sequelize on Node.js
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User.hasMany(Post, {foreignKey: 'user_id'})
Post.belongsTo(User, {foreignKey: 'user_id'})
Post.find({ where: { ...}, include: [User]})
Which will give you
SELECT
`posts`.*,
`users`.`username` AS `users.username`, `users`.`email` AS `users.email`,
`users...
In Windows cmd, how do I prompt for user input and use the result in another command?
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Try this:
@echo off
set /p id="Enter ID: "
You can then use %id% as a parameter to another batch file like jstack %id%.
For example:
set /P id=Enter id:
jstack %id% > jstack.txt
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Android - styling seek bar
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I would extract drawables and xml from Android source code and change its color to red.
Here is example how I completed this for mdpi drawables:
Custom red_scrubber_control.xml (add to res/drawable):
<selector xmlns:android="http://schemas.android.com/apk/res/and...
数据结构与本地数据库 04：从打包 JSON 读取知识卡片 · App Inventor 2 中文网
... 本课配置
标签_标题
标签
Width=Fill parent；FontSize=24；TextColor=#183153；Text=知识卡片 · 第 4课
微数据库1
微数据库
Namespace=CardsB04
文本输入框_导入文件
文本输入框
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How to obtain a Thread id in Python?
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threading.get_ident() works, or threading.current_thread().ident (or threading.currentThread().ident for Python < 2.6).
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How can I get Docker Linux container information from within the container itself?
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I've found out that the container id can be found in /proc/self/cgroup
So you can get the id with :
cat /proc/self/cgroup | grep -o -e "docker-.*.scope" | head -n 1 | sed "s/docker-\(.*\).scope/\\1/"
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Remove element by id
... }
}
And then you can remove elements like this
document.getElementById("my-element").remove();
or
document.getElementsByClassName("my-elements").remove();
Note: this solution doesn't work for IE 7 and below. For more info about extending the DOM read this article.
EDIT: Reviewing my ans...
Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns...