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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets

I have read many posts on SO and the web regarding the keywords in my question title and learned a lot from them. Some of the questions I read are related to specific implementation challenges while others focus on general concepts. I just want to make sure I understood all of the concepts and the r...
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Android: install .apk programmatically [duplicate]

I made this with help from Android download binary file problems and Install Application programmatically on Android . ...
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App Inventor 2 SemiCircleArc 扩展:高级自定义半圆进度条 · App Inventor 2 中文网

...上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 App ...
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Is there a string math evaluator in .NET?

If I have a string with a valid math expression such as: 16 Answers 16 ...
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What is DOM Event delegation?

Can anyone please explain event delegation in JavaScript and how is it useful? 11 Answers ...
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Pass a data.frame column name to a function

I'm trying to write a function to accept a data.frame ( x ) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function. ...
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How to get a table cell value using jQuery?

I am trying to work out how to get the value of table cell for each row using jQuery. 9 Answers ...
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Check if a number has a decimal place/is a whole number

I am looking for an easy way in JavaScript to check if a number has a decimal place in it (in order to determine if it is an integer). For instance, ...
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How to get a subset of a javascript object's properties

Say I have an object: 25 Answers 25 ...
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How to display an unordered list in two columns?

With the following HTML, what is the easiest method to display the list as two columns? 15 Answers ...