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pandas GroupBy columns with NaN (missing) values
...3),
[1] * (2 * 3)]
col_names = ['col_a', 'col_b', 'value']
test_df = pd.DataFrame(data_block, index=col_names).T
grouped_df = safe_groupby(test_df, ['col_a', 'col_b'],
OrderedDict([('value', 'sum')]))
This will return the successful result without having ...
Select arrow style change
...-appearance:none; /* Safari and Chrome */
appearance:none;
}
Haven't tested, but should work.
EDIT: It looks like Firefox doesn't support this feature up until version 35 (read more here)
There is a workaround here, take a look at jsfiddle on that post.
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How to get the name of enumeration value in Swift?
...
In Swift-3 (tested with Xcode 8.1) you can add the following methods in your enum:
/**
* The name of the enumeration (as written in case).
*/
var name: String {
get { return String(describing: self) }
}
/**
* The full name of th...
Change an HTML5 input's placeholder color with CSS
...is just cut off if it doesn’t fit – size your input elements in em and test them with big minimum font size settings. Don’t forget translations: some languages need more room for the same word.
Browsers with HTML support for placeholder but without CSS support for that (like Opera) should be ...
Seeing escape characters when pressing the arrow keys in python shell
...ine 1, in <module>
ImportError: dlopen(/Users/pi/tmp/python-readline-test/.venv/lib/python3.5/readline.so, 2): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib
Referenced from: /Users/pi/tmp/python-readline-test/.venv/lib/python3.5/readline.so
Reason: image not found
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What is the difference between == and Equals() for primitives in C#?
... two objects to be of the same type and have the same value, while == just tests if the two values are the same.
Object.Equals
http://msdn.microsoft.com/en-us/library/bsc2ak47(v=vs.110).aspx
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Are HTTP cookies port specific?
...ourse they do. I (and probably million other developers) use localhost for testing all the time. Unless the added port makes a difference: localhost:8080
– David Balažic
Jun 12 '14 at 10:08
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FileSystemWatcher vs polling to watch for file changes
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I have seen the file system watcher fail in production and test environments. I now consider it a convenience, but I do not consider it reliable. My pattern has been to watch for changes with the files system watcher, but poll occasionally to catch missing file changes.
Edit: If...
Redirect all to index.php using htaccess
...'path'] variable will contain the fake directory structure, so /mvc/module/test for instance, which you can then use in index.php to determine the Controller and actions you want to perform.
If you want the whole shebang installed in a sub-directory, such as /mvc/ or /framework/ the least complica...
How can I fill a div with an image while keeping it proportional?
...lorempizza.com/320/240" alt="" />
</div>
JSFiddle here
I tested this successfully in IE9, Chrome 31, and Opera 18. But no other browsers were tested. As always you must consider your particular support requirements.
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