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Changing MongoDB data store directory
...ead of the default /data/db
dbpath = /usr/local/var/mongodb
The official 10gen Linux packages (Ubuntu/Debian or CentOS/Fedora) ship with a basic configuration file which is placed in /etc/mongodb.conf, and the MongoDB service reads this when it starts up. You could make your change here.
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How can I rename a database column in a Ruby on Rails migration?
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2331
rename_column :table, :old_column, :new_column
You'll probably want to create a separate migra...
What do the &,
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198
The & marks an alias for the node (in your example &default aliases the development no...
Apply CSS styles to an element depending on its child elements
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126
As far as I'm aware, styling a parent element based on the child element is not an available f...
Hide/Show Column in an HTML Table
...write to className on the container, assuming style rules like:
table.hide1 .col1 { display: none; }
table.hide2 .col2 { display: none; }
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This is going to be faster than any JS loop approach; for really long tables it can make a significant difference to responsiveness.
If you can get away w...
Inheritance and Overriding __init__ in python
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158
The book is a bit dated with respect to subclass-superclass calling. It's also a little dated...
std::auto_ptr to std::unique_ptr
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221
You cannot do a global find/replace because you can copy an auto_ptr (with known consequences), ...
Timertask or Handler
Let's say that I want to perform some action every 10 seconds and it doesn't necessarily need to update the view.
3 Answer...
How to force a web browser NOT to cache images
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17 Answers
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SQL, Postgres OIDs, What are they and why are they useful?
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165
OIDs basically give you a built-in id for every row, contained in a system column (as opposed ...