大约有 42,000 项符合查询结果(耗时:0.0506秒) [XML]

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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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What's the difference between fill_parent and wrap_content?

... Either attribute can be applied to View's (visual control) horizontal or vertical size. It's used to set a View or Layouts size based on either it's contents or the size of it's parent layout rather than explicitly specifying a dimension. fill_parent (deprecated and renamed MATCH_PAR...
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Java or Python for Natural Language Processing [closed]

I would like to know which programming language is better for natural language processing. Java or Python ? I have found lots of questions and answers regarding about it. But I am still lost in choosing which one to use. ...
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What is the correct way to represent null XML elements?

... xsi:nil is the correct way to represent a value such that: When the DOM Level 2 call getElementValue() is issued, the NULL value is returned. xsi:nil is also used to indicate a valid element with no content even if that elements content type...
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What exactly are iterator, iterable, and iteration?

What is the most basic definition of "iterable", "iterator" and "iteration" in Python? 13 Answers ...
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When to choose checked and unchecked exceptions

In Java (or any other language with checked exceptions), when creating your own exception class, how do you decide whether it should be checked or unchecked? ...
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Check free disk space for current partition in bash

I am writing an installer in bash. The user will go to the target directory and runs the install script, so the first action should be to check that there is enough space. I know that df will report all file systems, but I was wondering if there was a way to get the free space just for the partition...
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How can I upload files asynchronously?

...ry. Not only that, you can do file validations (name, size, and MIME type) or handle the progress event with the HTML5 progress tag (or a div). Recently I had to make a file uploader, but I didn't want to use Flash nor Iframes or plugins and after some research I came up with the solution. The HTML...
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SSO with CAS or OAuth?

I wonder if I should use the CAS protocol or OAuth + some authentication provider for single sign-on. 5 Answers ...
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Getting Java version at runtime

I need to work around a Java bug in JDK 1.5 which was fixed in 1.6. I'm using the following condition: 12 Answers ...