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Preferred Java way to ping an HTTP URL for availability

...out The timeout in millis for both the connection timeout and the response read timeout. Note that * the total timeout is effectively two times the given timeout. * @return <code>true</code> if the given HTTP URL has returned response code 200-399 on a HEAD request within the * given ...
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Decoding JSON using json.Unmarshal vs json.NewDecoder.Decode

...ule of thumb is this: Use json.Decoder if your data is coming from an io.Reader stream, or you need to decode multiple values from a stream of data. Use json.Unmarshal if you already have the JSON data in memory. For the case of reading from an HTTP request, I'd pick json.Decoder since you're ob...
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Why can't radio buttons be “readonly”?

...doesn't submit the value (or does it?), and it grays out the radio button. Read-only is really what I'm looking for, but for some mysterious reason it doesn't work. ...
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Are std::vector elements guaranteed to be contiguous?

...ctually C++03 is also called C++98-TC1 (technical corrigendum) from what i read – Johannes Schaub - litb May 11 '09 at 18:02 2 ...
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Why does comparing strings using either '==' or 'is' sometimes produce a different result?

...is inherently O(n) in the length of the strings; it typically requires reads from several regions of memory, which take time; and the reads fills up the processor cache, meaning there is less cache available for other needs. With interned strings, a simple object identity test suffic...
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Download large file in python with requests

...). The problem is it's not possible to keep whole file in memory I need to read it in chunks. And this is a problem with the following code ...
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When is TCP option SO_LINGER (0) required?

... local agents in the infrastructure, change the model to push. But if we already have such an application and it grows, then we can make it work by tuning twe linger. You change one param, and you suddenly have working application, without investing a budget to implement new architecture. ...
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“std::endl” vs “\n”

...ediately" is a red herring, since cout is tied to cin, meaning that if you read input from cin, cout will be flushed first. But if you want to display a progress bar or something without reading from cin, then sure, flushing is useful. – Chris Jester-Young Mar ...
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IIS 500.19 with 0x80070005 The requested page cannot be accessed because the related configuration d

...ck of validity as this is most likely just the effect of not being able to read the file due to a lack of authorization. The reason it cannot read the config file is because the process running your web app does not have permission to access the file/directory. So you need to give the process runni...
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Using Phonegap for Native Application development [closed]

...ff, as your app will load faster (initialize) and run smoother. onDeviceReady - This is the method that's called once phonegap has loaded and is ready. $(document).ready or whatever you're used to, doesn't really apply here - unless you're only doing interface/hard-coded HTML stuff. If you're i...