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Replace None with NaN in pandas dataframe
... which will replace the Python object None, not the string 'None'.
import pandas as pd
import numpy as np
For dataframe:
df = df.fillna(value=np.nan)
For column or series:
df.mycol.fillna(value=np.nan, inplace=True)
share...
How to convert ActiveRecord results into an array of hashes
...s.all
tasks_records = tasks_records.as_json
# You can now add new records and return the result as json by calling `to_json`
tasks_records << TaskStoreStatus.last.as_json
tasks_records << { :task_id => 10, :store_name => "Koramanagala", :store_region => "India" }
tasks_records...
How do I prevent the padding property from changing width or height in CSS?
...ed Feb 10 '17 at 5:59
Abhishek Pandey
11.2k88 gold badges2828 silver badges5454 bronze badges
answered Aug 20 '12 at 8:58
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Prevent text selection after double click
I'm handling the dblclick event on a span in my web app. A side-effect is that the double click selects text on the page. How can I prevent this selection from happening?
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Can Vim highlight matching HTML tags like Notepad++?
Vim has support for matching pairs of curly brackets, parentheses, and square brackets. This is great for editing C-style languages like PHP and JavaScript. But what about matching HTML tags?
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Can I concatenate multiple MySQL rows into one field?
...048;
Of course, you can change 2048 according to your needs. To calculate and assign the value:
SET group_concat_max_len = CAST(
(SELECT SUM(LENGTH(hobbies)) + COUNT(*) * LENGTH(', ')
FROM peoples_hobbies
GROUP BY person_id)
AS UNSIGNED
);
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How to get Resource Name from Resource id
... Any idea what the difference is between getResourceEntryName(int resid) and getResourceName(int resid)?
– Joshua Pinter
Jan 22 '14 at 17:10
10
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Is there an onSelect event or equivalent for HTML ?
I have an input form that lets me select from multiple options, and do something when the user changes the selection. Eg,
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How to execute PHP code from the command line?
...function_exists("my_func")) echo 'function exists'; directly with the command line without having to use a seperate php file.
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How do you use variables in a simple PostgreSQL script?
For example, in MS-SQL, you can open up a query window and run the following:
10 Answers
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