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Efficiently test if a port is open on Linux?
From a bash script how can I quickly find out whether a port 445 is open/listening on a server.
14 Answers
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Difference between pre-increment and post-increment in a loop?
Is there a difference in ++i and i++ in a for loop? Is it simply a syntax thing?
22 Answers
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How do I iterate over an NSArray?
I'm looking for the standard idiom to iterate over an NSArray. My code needs to be suitable for OS X 10.4+.
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How to access pandas groupby dataframe by key
How do I access the corresponding groupby dataframe in a groupby object by the key?
5 Answers
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Get a pixel from HTML Canvas?
Is it possible to query a HTML Canvas object to get the color at a specific location?
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How do I upload a file with metadata using a REST web service?
I have a REST web service that currently exposes this URL:
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How do I kill background processes / jobs when my shell script exits?
I am looking for a way to clean up the mess when my top-level script exits.
13 Answers
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Are there any O(1/n) algorithms?
Are there any O(1/n) algorithms?
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Why am I seeing “TypeError: string indices must be integers”?
I'm playing with both learning python and trying to get github issues into a readable form. Using the advice on How can I convert JSON to CSV? I came up with this:
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Join a list of strings in python and wrap each string in quotation marks
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