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Store pictures as files or in the database for a web app?
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Just to add some more to the already good answers so far. You can still get the benefits of caching from both the web level maybe and the database level if you go the route keeping you images in the database.
I think for the database you ca...
ie8 var w= window.open() - “Message: Invalid argument.”
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Add column with constant value to pandas dataframe [duplicate]
...ata is structured.
Consider storing your data in a sparse data structure. More information: sparse data structures
If you must store a column of lists, ensure not to copy the same reference multiple times.
# Wrong
df['new'] = [[]] * len(df)
# Right
df['new'] = [[] for _ in range(len(df))]
Ge...
How to scroll to the bottom of a UITableView on the iPhone before the view appears
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指定组件的大小 · App Inventor 2 中文网
...rangement, components are arranged in a grid of rows and columns, with not more than one component visible in each cell. If multiple components occupy the same cell, only the last one will be visible. Avoid inadvertently placing several components in a single cell.
Within each row, components are v...
Database: To delete or not to delete records
...ated)
It can make it impossible to use a natural key. You may have one or more deleted rows with the natural key and a real row wanting to use that same natural key.
There may be legal/compliance reasons why you are meant to actually delete data.
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Is there some way to PUSH data from web server to browser?
...r answer, I'm sure this could be implemented using the same idea but using more extensively AJAX or coding in JSON for better results. This was designed pre-AJAX era, so there are lots of room for improvement.
If someone can provide a actual lightweight implementation of this, great!
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Writing a pandas DataFrame to CSV file
...This function offers many arguments with reasonable defaults that you will more often than not need to override to suit your specific use case. For example, you might want to use a different separator, change the datetime format, or drop the index when writing. to_csv has arguments you can pass to a...
Optimize Font Awesome for only used classes
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fontello is very good but IcoMoon is even more awesome.
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