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Get the client's IP address in socket.io
..., is there an easy way to get the IP address of an incoming connection? I know you can get it from a standard HTTP connection, but socket.io is a bit of a different beast.
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Unresolved specs during Gem::Specification.reset:
... cleanup lumberjack
Or:
gem list lumberjack
gem uninstall lumberjack
If you're using Bundler, you can try bundle exec guard (or in my case bundle exec rspec).
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Is it possible to use 'else' in a list comprehension? [duplicate]
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The syntax a if b else c is a ternary operator in Python that evaluates to a if the condition b is true - otherwise, it evaluates to c. It can be used in comprehension statements:
>>> [a if a else 2 for a in [0,1,0,3]]
[2, 1, 2,...
How to show math equations in general github's markdown(not github's blog)
...are shown the same while they are actually different. Would you happen to know why it happens?
– Sam
Feb 17 '14 at 4:13
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Flatten an Array of Arrays in Swift
Is there a counterpart in Swift to flatten in Scala, Xtend, Groovy, Ruby and co?
14 Answers
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Is it better to use Enumerable.Empty() as opposed to new List() to initialize an IEnumerable
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I think most postings missed the main point. Even if you use empty array or empty list, those are objects and they are stored in memory. Than Garbage Collector has to take care of them. If you are dealing with high throughput application, it could be noticeable impact.
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Validating IPv4 addresses with regexp
... parentheses around your alternation otherwise the (\.|$) is only required if the number is less than 200.
'\b((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.|$)){4}\b'
^ ^
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Difference between del, remove and pop on lists
Is there any difference between the above three methods to remove an element from a list?
11 Answers
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How do I remove javascript validation from my eclipse project?
...e messing around with my eclipse settings, I turned on Javascript support. Now eclipse complains that JQuery library has errors in it and is not letting me compile the project. Does anyone know how to turn javascript validation off?
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Create a table without a header in Markdown
...d multiline_tables extensions)
Flexmark: A parser in Java.
CSS solution
If you're able to change the CSS of the HTML output you can however leverage the :empty pseudo class to hide an empty header and make it look like there is no header at all.
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