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What are the differences between segment trees, interval trees, binary indexed trees and range trees
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+25
All these data structures are used for solving different problems:
Segment tree stores intervals, and optimized for "which of these ...
How should I read a file line-by-line in Python?
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edited Jun 25 '18 at 6:33
Eric Platon
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Clean ways to write multiple 'for' loops
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edited Jan 10 '14 at 11:57
hansmaad
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answered J...
How to attach my repo to heroku app
...thenengah
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List all the files that ever existed in a Git repository
...n one repo.
– ThorSummoner
Apr 27 '15 at 5:50
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--diff-filter=A ignores files that were created b...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
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## t b a
## 1: 1 NA 1
## 2: 2 NA 4
## 3: 3 9 9
## 4: 4 16 16
## 5: 5 25 NA
## 6: 6 36 NA
# The following will give the same with the column order X,Y
X[Y[J(unique_keys)]]
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improv...
Is an index needed for a primary key in SQLite?
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150
It does it for you.
INTEGER PRIMARY KEY columns aside, both UNIQUE and PRIMARY KEY
constr...
How do you get the magnitude of a vector in Numpy?
...-- say x.norm() -- but oh well).
import numpy as np
x = np.array([1,2,3,4,5])
np.linalg.norm(x)
You can also feed in an optional ord for the nth order norm you want. Say you wanted the 1-norm:
np.linalg.norm(x,ord=1)
And so on.
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Editing Javascript using Chrome Developer Tools
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