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Storing SHA1 hash values in MySQL
...lso wouldn’t store the value the SHA1 is returning. Because it uses just 4 bit per character and thus would need 160/4 = 40 characters. But if you use 8 bit per character, you would only need a 160/8 = 20 character long field.
So I recommend you to use BINARY(20) and the UNHEX function to convert...
Ruby, remove last N characters from a string?
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43
Ruby 2.5+
As of Ruby 2.5 you can use delete_suffix or delete_suffix! to achieve this in a fast...
What is the difference between a deep copy and a shallow copy?
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S.LottS.Lott
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What is the relationship between Looper, Handler and MessageQueue in Android?
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Ted HoppTed Hopp
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Markdown: continue numbered list
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Levi Fuller
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answered Aug 6 '13 at 19:45
MacmadeMacmade
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Pandas convert dataframe to array of tuples
...a_2']]
tuples = [tuple(x) for x in subset.to_numpy()]
for pandas < 0.24 use
tuples = [tuple(x) for x in subset.values]
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When should TaskCompletionSource be used?
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234
I mostly use it when only an event based API is available (for example Windows Phone 8 sockets):...
Finding all possible combinations of numbers to reach a given sum
...target, partial + [n])
if __name__ == "__main__":
subset_sum([3,9,8,4,5,7,10],15)
#Outputs:
#sum([3, 8, 4])=15
#sum([3, 5, 7])=15
#sum([8, 7])=15
#sum([5, 10])=15
This type of algorithms are very well explained in the following Standford's Abstract Programming lecture -...
How to generate a range of numbers between two numbers?
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164
Select non-persisted values with the VALUES keyword. Then use JOINs to generate lots and lots of...