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Are tuples more efficient than lists in Python?
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The dis module disassembles the byte code for a function and is useful to see the difference b...
Heap vs Binary Search Tree (BST)
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Summary
Type BST (*) Heap
Insert average log(n) 1
Insert worst ...
Count how many records are in a CSV Python?
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16 Answers
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PHP Sort Array By SubArray Value
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edited May 23 '17 at 12:10
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answered Mar 19 '10 at 13:14
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Adding 'serial' to existing column in Postgres
...imary key) which currently contains unique sequential integers starting at 1, but which was not created using the 'serial' keyword.
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Mapping a function on the values of a map in Clojure
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11 Answers
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How do you convert epoch time in C#?
...ow do you convert Unix epoch time into real time in C#? (Epoch beginning 1/1/1970)
14 Answers
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How can I check if character in a string is a letter? (Python)
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You can use str.isalpha().
For example:
s = 'a123b'
for char in s:
print(char, char.isa...
How to count TRUE values in a logical vector
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There are some problems when logical vector contains NA values.
See for example:
z <- c(TR...