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Extracting just Month and Year separately from Pandas Datetime column
...ng year and month separately you can do this:
df['year'] = pd.DatetimeIndex(df['ArrivalDate']).year
df['month'] = pd.DatetimeIndex(df['ArrivalDate']).month
or...
df['year'] = df['ArrivalDate'].dt.year
df['month'] = df['ArrivalDate'].dt.month
Then you can combine them or work with them just as ...
How to merge a list of lists with same type of items to a single list of items?
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Use the SelectMany extension method
list = listOfList.SelectMany(x => x).ToList();
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How to print a number with commas as thousands separators in JavaScript
...print an integer in JavaScript with commas as thousands separators. For example, I want to show the number 1234567 as "1,234,567". How would I go about doing this?
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What is the difference between i++ and ++i?
...es the variable is incremented, but if you were to take the value of both expressions in exactly the same cases, the result will differ.
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Linq style “For Each” [duplicate]
Is there any Linq style syntax for "For each" operations?
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6
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finding and replacing elements in a list
... edited Jan 31 '18 at 13:46
Maximilian Peters
21.7k77 gold badges5353 silver badges7070 bronze badges
answered Apr 6 '10 at 1:41
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Getting a map() to return a list in Python 3.x
I'm trying to map a list into hex, and then use the list elsewhere. In python 2.6, this was easy:
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How to validate an email address using a regular expression?
Over the years I have slowly developed a regular expression that validates MOST email addresses correctly, assuming they don't use an IP address as the server part.
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How to crop an image in OpenCV using Python
...y slicing.
import cv2
img = cv2.imread("lenna.png")
crop_img = img[y:y+h, x:x+w]
cv2.imshow("cropped", crop_img)
cv2.waitKey(0)
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Annotating text on individual facet in ggplot2
I want to annotate some text on last facet of the plot with the following code:
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