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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...
How to force a web browser NOT to cache images
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17 Answers
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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...
How to parse a date? [duplicate]
...teFormat that is set up with a different format.
To parse your "Thu Jun 18 20:56:02 EDT 2009" date string you need a SimpleDateFormat like this (roughly):
SimpleDateFormat parser=new SimpleDateFormat("EEE MMM d HH:mm:ss zzz yyyy");
Use this to parse the string into a Date, and then your other ...
How do you do a simple “chmod +x” from within python?
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201
Use os.stat() to get the current permissions, use | to or the bits together, and use os.chmod() ...
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...
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...
How can I clone an SQL Server database on the same server in SQL Server 2008 Express?
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13 Answers
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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...