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How to select the last record of a table in SQL?
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Without any further information, which Database etc the best we can do is something like
Sql Server
SELECT TOP 1 * FROM Table ORDER BY ID DESC
MySql
SELECT * FROM Table ORDER BY ID DESC LIMIT 1
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How do I convert dates in a Pandas data frame to a 'date' data type?
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Use astype
In [31]: df
Out[31]:
a time
0 1 2013-01-01
1 2 2013-01-02
2 3 2013-01-03
In [32]: df['time'] = df['time'].astype('datetime64[ns]')
In [33]: df
Out[33]:
a time
0 1 2013-01-01 00:00:00
1 2 2013-01-02 00:00:00
2 3 2013-01-03 00:00:00...
Python style - line continuation with strings? [duplicate]
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The problem is when assigning to a variable, this form looks too similar to a tuple. If you add a comma between the strings, it's a tuple with two strings.
– Eric
Mar 23 '19 at 1:41
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Recommended way to insert elements into map [duplicate]
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assert( myMap.find( key )->second == value ); // post-condition
This form will overwrite any existing entry.
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CMake not able to find OpenSSL library
... Works like a charm, thanks! I was able to extract the zip file downloaded form the link you mentioned. After that I just added -DOPENSSL_ROOT-DIR="C:/Path/To/Extracted/Files".
– Charlie Vieillard
Apr 9 '15 at 8:05
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How to navigate a few folders up?
...}
return file;
}
Note: Application.StartupPath is usually used in WinForms applications, but it works in console applications as well; however, you will have to set a reference to the System.Windows.Forms assembly. You can replace Application.StartupPath by
Path.GetDirectoryName(Assembly.GetEx...
pandas read_csv and filter columns with usecols
...as as pd
from StringIO import StringIO
csv = r"""dummy,date,loc,x
bar,20090101,a,1
bar,20090102,a,3
bar,20090103,a,5
bar,20090101,b,1
bar,20090102,b,3
bar,20090103,b,5"""
df = pd.read_csv(StringIO(csv),
header=0,
index_col=["date", "loc"],
usecols=["date", "loc", "x"],
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Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
...ink the key observation is that an 8-digit number has about 26.6 bits of information and one million is 19.9 bits. If you delta compress the list (store the differences of adjacent values) the differences range from 0 (0 bits) to 99999999 (26.6 bits) but you can't have the maximum delta between eve...
Bigger Glyphicons
... solved.
<div class="input-group">
<input type="text" class="form-control" id="pesquisarinbox" placeholder="Pesquisar na Caixa de Entrada">
<div class="input-group-btn">
<button class="btn btn-default" type="button">
<span class="glyphicon glyp...
Git and Mercurial - Compare and Contrast
...sions (plugins) and established API; Git has scriptability and established formats.
There are a few things that differ Mercurial from Git, but there are other things that make them similar. Both projects borrow ideas from each other. For example hg bisect command in Mercurial (formerly bisect ex...