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How to list all installed packages and their versions in Python?
... your installer tools you can simply call this:
pip freeze
It will also include version numbers for the installed packages.
Update
pip has been updated to also produce the same output as pip freeze by calling:
pip list
Note
The output from pip list is formatted differently, so if you have s...
Where to find “Microsoft.VisualStudio.TestTools.UnitTesting” missing dll?
... @AmitPal What edition of Visual Studio do you have? It should be included with most editions.
– Joachim Isaksson
Nov 28 '12 at 10:11
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What data type to use for hashed password field and what length?
...of the mathematical calculation in the hashing algorithm.
Many libraries include a pair functions that conveniently packages this information as a single string: one that takes the algorithm indicator, the hardness indicator and the password, generates a random salt and returns the full hash strin...
update package.json version automatically
...h version by 1 (x.x.1 to x.x.2) in package.json. Then you add all files -- including package.json which at that point has been modified.
Then, the usual git commit and git push, and finally npm publish to publish the module.
I hope this makes sense...
Merc.
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Python division
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In python cv2 not updated the division calculation. so, you must include from __future__ import division in first line of the program.
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SQL: How to properly check if a record exists
...e between COUNT(*) and COUNT(column name):
COUNT(*) will count all rows, including nulls
COUNT(column name) will only count non null occurrences of column name
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MySql Table Insert if not exist otherwise update
...ould use INSERT ... ON DUPLICATE KEY UPDATE.
Note that you do not need to include datenum in the update clause since it's the unique key, so it should not change. You do need to include all of the other columns from your table. You can use the VALUES() function to make sure the proper values are us...
Git cherry pick vs rebase
...C0 through C2 with it — effectively, "experiment" is "master" up to, and including, C2 plus commit C3 on top of it. (This is the simplest possible case; of course, "experiment" could contain several dozens of commits on top of its original base.)
Now git rebase is told to rebase "experiment" onto...
What are the applications of binary trees?
...ervice in routers, and A* (path-finding algorithm used in AI applications, including robotics and video games). Also used in heap-sort.
Huffman Coding Tree (Chip Uni) - used in compression algorithms, such as those used by the .jpeg and .mp3 file-formats.
GGM Trees - Used in cryptographic applicati...
Determine the path of the executing BASH script [duplicate]
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