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Pandas dataframe get first row of each group
... first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 second
4 5 first
5 6 first
6 7 fourth
To get n first records, you can ...
Pass a PHP string to a JavaScript variable (and escape newlines) [duplicate]
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If you use UTF-8 that's the best solution by far.
– Kornel
Oct 13 '08 at 23:02
4
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How to add parameters to a HTTP GET request in Android?
...etParams( basicHttpParms ) on my HttpGet object. This method fails. But if I manually add my parameters to my URL (i.e. append ?param1=value1&param2=value2 ) it succeeds.
...
initialize a numpy array
... of a shape and add to it? I will explain what I need with a list example. If I want to create a list of objects generated in a loop, I can do:
...
How to open a file using the open with statement
... Read a list of names from a file line by line into an output file.
If a line begins with a particular name, insert a string of text
after the name before appending the line to the output file.
'''
with open(newfile, 'w') as outfile, open(oldfile, 'r', encoding='utf-8') as infile...
Setting UIButton image results in blue button in iOS 7
...so results in a hard transition between the highlighted and normal states. If you're looking to preserve the system behavior, animations, etc., but want to get rid of the tint color, try [myUIButton setImage: [[UIImage imageNamed: @"myButtonImage"] imageWithRenderingMode: UIImageRenderingModeAlwaysO...
Patterns for handling batch operations in REST web services?
...into batches and then post them to the server periodically.
The object, if I remember correctly, essentially just held an array of "commands" -- e.g., to extend your example, each one a record containing a "markAsRead" command, a "messageId" and maybe a reference to a callback/handler function --...
How to make CSS width to fill parent?
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EDIT:
Those three different elements all have different rendering rules.
So for:
table#bar you need to set the width to 100% otherwise it will be only be as wide as it determines it needs to be. However, if the table rows total width is great...
Passing base64 encoded strings in URL
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There are additional base64 specs. (See the table here for specifics ). But essentially you need 65 chars to encode: 26 lowercase + 26 uppercase + 10 digits = 62.
You need two more ['+', '/'] and a padding char '='. But none of them are url friendly, so just use different chars for th...
“TypeError: (Integer) is not JSON serializable” when serializing JSON in Python?
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That'd be nice if the JSON unserializable error message could display the type of the object...
– Franck Dernoncourt
Jul 21 '15 at 19:41
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