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Joining three tables using MySQL
...ER JOIN bridge b ON s.id = b.sid
INNER JOIN course c ON b.cid = c.id
ORDER BY s.name
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Is there more to an interface than having the correct methods
... should provide inheritance, encapsulation, modularity and polymorphism in order to be a fully-featured Object Oriented language. In dynamically-typed - or duck typed - languages (like Smalltalk,) polymorphism is trivial; however, in statically typed languages (like Java or C#,) polymorphism is far...
Converting Dictionary to List? [duplicate]
I'm trying to convert a Python dictionary into a Python list, in order to perform some calculations.
7 Answers
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What is the best way to implement nested dictionaries?
...': {}}}}}
And as the last line shows, it pretty prints beautifully and in order for manual inspection. But if you want to visually inspect your data, implementing __missing__ to set a new instance of its class to the key and return it is a far better solution.
Other alternatives, for contrast:
dict...
mysql - how many columns is too many?
...es NOT mean table is denormalized. Think real estate contracts / purchase orders / other financial documents just to name a few examples. Can they be further split up into multiple tables? Yes. Any reason to do so? Not really.
– ChssPly76
Sep 25 '09 at 19:55
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How to become an OpenCart guru? [closed]
...0);
Understanding variable assignment in views from the controller
In order to pass values to the view from the controller, you simply need to assign your data to the $this->data variable, which is essentially an array of key => value pairs. As an example
$this->data['example_var'] = ...
Write a program that will surely go into deadlock [closed]
...y another thread.
So, an easy way to avoid deadlock is to give some total ordering to resources and impose a rule that resources are only ever acquired by threads in order. Conversely, a deadlock can be intentionally created by running threads that acquire resources, but do not acquire them in orde...
How can you determine how much disk space a particular MySQL table is taking up?
...ze_mb, table_name FROM information_schema.tables WHERE table_schema='mydb' order by tablesize_mb; to get a list of all tables of mydb with name and size, ordered by size.
– kqw
Jun 15 '15 at 18:03
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How can I restore /etc/nginx? [closed]
By mistake I have removed /etc/nginx directory in my ubuntu 11.10 PC. How can I restore the ngnix directory in /etc/nginx ?
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Regex: Remove lines containing “help”, etc
...gex, I want to delete all lines containing "help" including keyboard_help, etc.
6 Answers
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