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Check if something is (not) in a list in Python
...t of tuples in Python , and I have a conditional where I want to take the branch ONLY if the tuple is not in the list (if it is in the list, then I don't want to take the if branch)
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How to determine the encoding of text?
I received some text that is encoded, but I don't know what charset was used. Is there a way to determine the encoding of a text file using Python? How can I detect the encoding/codepage of a text file deals with C#.
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Get month name from number
How can I get the month name from the month number?
12 Answers
12
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Ruby - elegantly convert variable to an array if not an array already
Given an array, a single element, or nil, obtain an array - the latter two being a single element array and an empty array respectively.
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How to use hex color values
... Swift, instead of the few standard ones that UIColor allows you to use, but I have no idea how to do it.
38 Answers
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python pandas dataframe to dictionary
...ame, and intend to convert it to python dictionary - the first column will be the key and the second will be the value. Thank you in advance.
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SQLite table constraint - unique on multiple columns
I can find syntax "charts" on this on the SQLite website, but no examples and my code is crashing. I have other tables with unique constraints on a single column, but I want to add a constraint to the table on two columns. This is what I have that is causing an SQLiteException with the message "syn...
Simple explanation of MapReduce?
Related to my CouchDB question.
8 Answers
8
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Ruby: Easiest Way to Filter Hash Keys?
...dated.
I'm adding an update here to help others avoid getting sidetracked by this answer like I did.
As the other answer mentions, Ruby >= 2.5 added the Hash#slice method which was previously only available in Rails.
Example:
> { one: 1, two: 2, three: 3 }.slice(:one, :two)
=> {:one=>...
Creating a new column based on if-elif-else condition
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To formalize some of the approaches laid out above:
Create a function that operates on the rows of your dataframe like so:
def f(row):
if row['A'] == row['B']:
val = 0
elif row['A'] > row['B']:
val = 1
else:
val = -1
return va...