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Pandas every nth row
... c
0 x x x
1 x x x
2 x x x
The index is floor-divved by the stride (2, in this case). If the index is non-numeric, instead do
# df.groupby(np.arange(len(df)) // 2).first()
df.groupby(pd.RangeIndex(len(df)) // 2).first()
a b c
0 x x x
1 x x x
2 x x x
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Update git commit author date when amending
...y commits quite often. I don't stash so much because I tend to forget I did so, especially when I want to save what I did before I leave or before a weekend, so I do a "draft" commit. Only thing is, when I amend the commit, it is still set to the original author date. Is there a (simple) way to up...
How to get rspec-2 to give the full trace associated with a test failure?
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It didn't show stack trace info about the error itself. Rather, it showed the stack trace of the rspec gem
– Aleksandrus
Jun 24 '16 at 2:08
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Export from sqlite to csv using shell script
...sv #file type is csv
sqlite> .output example.csv #you want to provide file name to export
sqlite> SELECT * from events; #If entire table is needed or select only required
sqlite> .quit #finally quit the sqlite3
Now search in your system for example.csv file and you will get...
Executing an EXE file using a PowerShell script
...uments go here>
That is & expects to be followed by a string that identifies a command: cmdlet, function, native exe relative or absolute path.
Once you get just this working:
& "c:\some path with spaces\foo.exe"
Start working on quoting of the arguments as necessary. Although it l...
Check if a Postgres JSON array contains a string
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how to get the rows where food array inside json is non empty , for example if we can consider , their are JSON , where food array also empty ,can you help
– Bravo
Sep 14 '17 at 23:54
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what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
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didnt this used to be :symbolize_keys ? why did that name change?
– Lukas
Sep 13 '12 at 15:56
5
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How to make a in Bootstrap look like a normal link in nav-tabs?
...btn-link">Link</button>
For example, with the code you have provided:
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet" />
<form action="..." method="post">
<div class="row-fluid">
<!-- Navigation for the f...
What are the aspect ratios for all Android phone and tablet devices?
I'm looking for a list of all screen aspect ratios for popular Android based Phones and Tablets.
5 Answers
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How to get jQuery to wait until an effect is finished?
...ry - Better Interaction and Design. Thanks again
– uriDium
Jun 30 '09 at 20:23
If someone has old jQuery, then this "a...