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Pandas get topmost n records within each group
... DataFrames only. Which is rather unfortunate, because what if you want to select more than one column?
– oulenz
Oct 23 '19 at 13:53
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Remove unwanted parts from strings in a column
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A very simple method would be to use the extract method to select all the digits. Simply supply it the regular expression '\d+' which extracts any number of digits.
df['result'] = df.result.str.extract(r'(\d+)', expand=True).astype(int)
df
time result
1 09:00 52
2 10:00...
What is the “right” way to iterate through an array in Ruby?
... way to iterate, useful when you want to transform one array into another.
select is the iterator to use when you want to choose a subset.
inject is useful for generating sums or products, or collecting a single result.
It may seem like a lot to remember, but don't worry, you can get by without k...
How do I find out which computer is the domain controller in Windows programmatically?
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@DorkyEngineer how about marking this as your selected answer?
– ErikE
Jan 4 '13 at 2:44
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Create a shortcut on Desktop
...f a solution works for you, it is customary to upvote it. Also, you should select the best solution and accept it as the answer to your problem.
– Thorarin
Feb 8 '11 at 10:46
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jQuery Ajax File Upload
...t;File Upload</td>
</tr>
<tr>
<th>Select File </th>
<td><input id="csv" name="csv" type="file" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="submit"/>
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Open file via SSH and Sudo with Emacs
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I had some troubles with the selected answer. However, it worked when I added this line to .emacs:
(add-to-list 'tramp-default-proxies-alist '(".*" "\\`root\\'" "/ssh:%h:"))
And then executed the following:
/sudo:ssh-host:file-on-ssh-host
It was sl...
WebSocket with SSL
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So how to select WSS if page is not loaded with HTTP?
– anatoly techtonik
Dec 13 '14 at 21:40
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HTML5 Canvas 100% Width Height of Viewport?
...o copy the fiddle code to run on your local machine, in which case you can select the mode via a querystring argument, as ?mode=redraw
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What is the cleanest way to disable CSS transition effects temporarily?
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Should probably select both ".notransition" and ".notransition *" to be fully effective.
– Nathan
Dec 27 '14 at 6:56
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