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Base64: What is the worst possible increase in space usage?
...the size of the base-64 representation of a string of size n is:
ceil(n / 3) * 4
So, for a 16kB array, the base-64 representation will be ceil(16*1024/3)*4 = 21848 bytes long ~= 21.8kB.
A rough approximation would be that the size of the data is increased to 4/3 of the original.
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How would you implement an LRU cache in Java?
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edited Aug 10 '10 at 16:36
answered Dec 23 '09 at 15:43
H...
Append column to pandas dataframe
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135
It seems in general you're just looking for a join:
> dat1 = pd.DataFrame({'dat1': [9,5]})
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Add a new item to a dictionary in Python [duplicate]
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3 Answers
3
Active
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How to randomly select an item from a list?
..., 'horse', 'staple']
print(secrets.choice(foo))
secrets is new in Python 3.6, on older versions of Python you can use the random.SystemRandom class:
import random
secure_random = random.SystemRandom()
print(secure_random.choice(foo))
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How to delete a row by reference in data.table?
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edited Nov 23 '18 at 12:47
Henrik
52.1k1111 gold badges117117 silver badges134134 bronze badges
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How do I clear a search box with an 'x' in bootstrap 3?
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To get something like this
with Bootstrap 3 and Jquery use the following HTML code:
<div class="btn-group">
<input id="searchinput" type="search" class="form-control">
<span id="searchclear" class="glyphicon glyphicon-remove-circle"></span&g...
How do I override nested NPM dependency versions?
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243
You can use npm shrinkwrap functionality, in order to override any dependency or sub-dependency....
How to use Active Support core extensions
I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.
5 Answers
5
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How to upload a file to directory in S3 bucket using boto
I want to copy a file in s3 bucket using python.
13 Answers
13
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