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Many-to-many relationship with the same model in rails?
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For reference: the Rails documentation on the subject. There's a section called “Many-to-many”, and of course the documentation on the class methods themselves.
Simplest scenario, uni-directional, no additional fields
This is the most compact in code.
I'll start out with this basic schema fo...
How did I get a value larger than 8 bits in size from an 8-bit integer?
...sible results for undefined behaviour is a valid consequence, there is actually no undefined behaviour in your code. What's happening is that the compiler thinks the behaviour is undefined, and optimises accordingly.
If c is defined as int8_t, and int8_t promotes to int, then c-- is supposed to per...
Convert java.util.Date to java.time.LocalDate
...Date instance has no concept of time-zone. This might seem strange if you call toString() on a java.util.Date, because the toString is relative to a time-zone. However that method actually uses Java's default time-zone on the fly to provide the string. The time-zone is not part of the actual state o...
Best way to store JSON in an HTML attribute?
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The HTML does not have to validate.
Why not? Validation is really easy QA that catches lots of mistakes. Use an HTML 5 data-* attribute.
The JSON object could be any size (i.e. huge).
I've not seen any documentation on browser limits to attribute sizes.
If you do run into them, ...
Good open source django project for learning [closed]
...lar projects is directly on GitHub: https://github.com/search?q=django
Finally:
Awesome Django @ https://github.com/wsvincent/awesome-django
Awesome Python @ https://github.com/vinta/awesome-python
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SQL JOIN and different types of JOINs
... and start with cross join and then "build" inner join on top of it. After all, the mere concept of cross join invalidates these informal and inaccurate Venn diagram visualisations...
– Lukas Eder
Apr 21 '17 at 17:25
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Why does this CSS margin-top style not work?
I try to add margin values on a div inside another div. All works fine except the top value, it seems to be ignored. But why?
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How to delete all data from solr and hbase
How do I delete all data from solr by command? We are using solr with lily and hbase .
18 Answers
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How do I remove the old history from a git repository?
...mple.com>
Date: Thu May 23 22:27:48 2013 +0200
Some message
If all looks as intended, you can just do a simple git filter-branch -- --all to make it permanent.
BEWARE: after doing the filter-branch step, all commit ids will have changed, so anybody using the old repo must never merge w...
Python style - line continuation with strings? [duplicate]
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Since adjacent string literals are automatically joint into a single string, you can just use the implied line continuation inside parentheses as recommended by PEP 8:
print("Why, hello there wonderful "
"stackoverflow people!")
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