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What does “hashable” mean in Python?
I tried searching internet but could not find the meaning of hashable.
9 Answers
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FileSystemWatcher vs polling to watch for file changes
I need to setup an application that watches for files being created in a directory, both locally or on a network drive.
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How can I check if an argument is defined when starting/calling a batch file?
I'm trying to use the following validation logic in a batch file but the "usage" block never executes even when no parameter is supplied to the batch file.
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List of lists changes reflected across sublists unexpectedly
I needed to create a list of lists in Python, so I typed the following:
14 Answers
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How to unit test an object with database queries
I've heard that unit testing is "totally awesome", "really cool" and "all manner of good things" but 70% or more of my files involve database access (some read and some write) and I'm not sure how to write a unit test for these files.
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Good reasons NOT to use a relational database?
Can you please point to alternative data storage tools and give good reasons to use them instead of good-old relational databases? In my opinion, most applications rarely use the full power of SQL--it would be interesting to see how to build an SQL-free application.
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Flatten an irregular list of lists
Yes, I know this subject has been covered before ( here , here , here , here ), but as far as I know, all solutions, except for one, fail on a list like this:
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Importing CommonCrypto in a Swift framework
How do you import CommonCrypto in a Swift framework for iOS?
16 Answers
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Why cast unused return values to void?
Is there any reason for casting an unused return value to void, or am I right in thinking it's a complete waste of time?
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What's the difference between :: (double colon) and -> (arrow) in PHP?
There are two distinct ways to access methods in PHP, but what's the difference?
6 Answers
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