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Error 1022 - Can't write; duplicate key in table
...ou can not have the same foreign key names in the database tables.
Check all your tables and all your foreign keys and avoid having two foreign keys with the same exact name.
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Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
I need some code samples (and I also really curious about them) of Scala and Java code which show that Scala code is more simple and concise then code written in Java (of course both samples should solve the same problem).
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How do I adb pull ALL files of a folder present in SD Card
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The scripts will start in the top folder and recursively go down and find all the "*.jpg" files and pull them from your phone to the current directory.
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How to get one value at a time from a generator function in Python?
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In Python <= 2.5, use gen.next(). This will work for all Python 2.x versions, but not Python 3.x
In Python >= 2.6, use next(gen). This is a built in function, and is clearer. It will also work in Python 3.
Both of these end up calling a specially named function, next(), wh...
Writing string to a file on a new line every time
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You can use:
file.write(your_string + '\n')
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In STL maps, is it better to use map::insert than []?
...els natural and is clear to read whereas he preferred map.insert(std::make_pair(key, value)) .
13 Answers
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Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
... sign of quality design.
IOStreams have a checkered history. They are actually a reworking of an earlier streams library, but were authored at a time when many of today's C++ idioms didn't exist, so the designers didn't have the benefit of hindsight. One issue that only became apparent over time wa...
wget/curl large file from google drive
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June 2020
pip install gdown
gdown https://drive.google.com/uc?id=file_id
The file_id should look something like 0Bz8a_Dbh9QhbNU3SGlFaDg
You can get it by right clicking on the file and then Get shareable link.
Only work on open access files (Anyone who has a link can View).
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How to pip or easy_install tkinter on Windows
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Well I can see two solutions here:
1) Follow the Docs-Tkinter install for Python (for Windows):
Tkinter (and, since Python 3.1, ttk) are included with all standard Python distributions. It is important that you use a version of Python supporting Tk 8.5 or greater, and ttk. We recommend in...
How to use transactions with dapper.net?
...icitly roll back on error or does System.Transactions handle that automatically?
– Norbert Norbertson
Oct 3 '17 at 12:30
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