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Converting a column within pandas dataframe from int to string
...() and apply() ) do not preserve NULL values in either the nan or the None form.
import pandas as pd
import numpy as np
df = pd.DataFrame([None,'string',np.nan,42], index=[0,1,2,3], columns=['A'])
df1 = df['A'].astype(str)
df2 = df['A'].apply(str)
print df.isnull()
print df1.isnull()
print df2....
Is there an equivalent for var_dump (PHP) in Javascript?
... of console.debug(object) before today, and it saved me a ton of time on a form I've been struggling with for three days. Withing 20 minutes, I had it fixed. Thank you!
– ShiningLight
Feb 27 '15 at 19:48
...
Pandas percentage of total with groupby
...703
Name: count, dtype: float64
For multiple groups you have to use transform (using Radical's df):
In [21]: c = df.groupby(["Group 1","Group 2","Final Group"])["Numbers I want as percents"].sum().rename("count")
In [22]: c / c.groupby(level=[0, 1]).transform("sum")
Out[22]:
Group 1 Group 2 F...
Which HTML Parser is the best? [closed]
...ource HTML parser written in Java. HTML found on Web is usually dirty, ill-formed and unsuitable for further processing. For any serious consumption of such documents, it is necessary to first clean up the mess and bring the order to tags, attributes and ordinary text. For the given HTML document, H...
How to easily map c++ enums to strings
...
Auto-generate one form from another.
Source:
enum {
VALUE1, /* value 1 */
VALUE2, /* value 2 */
};
Generated:
const char* enum2str[] = {
"value 1", /* VALUE1 */
"value 2", /* VALUE2 */
};
If enum values are large then a generate...
RequestDispatcher.forward() vs HttpServletResponse.sendRedirect()
...tcher("/WEB-INF/login.jsp").forward(request, response);
When you submit a form, you normally want to use POST:
<form action="login" method="post">
This way the servlet's doPost() will be invoked and you can do any postprocessing stuff in there (e.g. validation, business logic, login the user...
Why are floating point numbers inaccurate?
...ore detail, see: 675539944105574 / 4503599627370496.)
Now that we've transformed the third component into a fractional number, adding 1 gives the true mantissa.
Recapping the Components
Sign (first component): 0 for positive, 1 for negative
Exponent (middle component): Subtract 2(# of bits) - 1 ...
Sorting dropdown alphabetically in AngularJS
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Find unmerged Git branches?
...anch in `git branch -r --no-merged | grep -v HEAD`;
do echo -e `git show --format="%cd \\t%cr \\t%ae" $branch | head -n 1` \\t$branch;
done | sort -r >> $current_time.$file_name
echo "result is writtein in ";
echo $current_time.$file_name;
...
How are strings passed in .NET?
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