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What is the difference between 'E', 'T', and '?' for Java generics?

...... means that foo refers to a list of some type, but we don't know what. All of this is generics, which is a pretty huge topic. You may wish to learn about it through the following resources, although there are more available of course: Java Tutorial on Generics Language guide to generics Generi...
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How do I clone into a non-empty directory?

... will set the upstream branch for you, if that is what you want, and it usually is. share | improve this answer | follow | ...
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How do I calculate the normal vector of a line segment?

...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
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How to check if any flags of a flag combination are set?

...d point... and enums also implement IFormattable and IComparable. However, all numeric types implement those interfaces too, so it's not enough to exclude them – Thomas Levesque Apr 20 '12 at 23:09 ...
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Removing empty lines in Notepad++

...g like a regular expression. You have to be in Extended mode If you want all the lines to end up on a single line use \r\n. If you want to simply remove empty lines, use \n\r as @Link originally suggested. Replace either expression with nothing. ...
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In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?

... 32 It's between the Z and the C on your keyboard. ...
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Is gcc 4.8 or earlier buggy about regular expressions?

..., it is not implemented. That prototype <regex> code was added when all of GCC's C++0x support was highly experimental, tracking early C++0x drafts and being made available for people to experiment with. That allowed people to find problems and give feedback to the standard committee before t...
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How to remove a single, specific object from a ConcurrentBag?

... is no guarantee that repeatedly removing items and putting them back will allow you to iterate over the all the items. Two alternatives for you: Remove all items and remember them, until you find the one you want to remove, then put the others back afterwards. Note that if two threads try to do ...
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Can I serve multiple clients using just Flask app.run() as standalone?

... need static files, no HTTP Post methods. My requirement is, I want to run all Flask threads as part of my parent app, so that they all can share variables. – ATOzTOA Feb 12 '13 at 6:03 ...
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Xml serialization - Hide null values

When using a standard .NET Xml Serializer, is there any way I can hide all null values? The below is an example of the output of my class. I don't want to output the nullable integers if they are set to null. ...