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What would cause an algorithm to have O(log n) complexity?
...o have that log2 16 = 4. Hmmm... what about 128?
128 / 2 = 64
64 / 2 = 32
32 / 2 = 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
This took seven steps, and log2 128 = 7. Is this a coincidence? Nope! There's a good reason for this. Suppose that we divide a number n by 2 i times. Then...
Best approach to converting Boolean object to string in java
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edited Sep 16 '13 at 16:45
answered Sep 16 '13 at 16:39
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Using bitwise OR 0 to floor a number
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How does it work? Our theory was that using such an operator casts the
number to an integer...
Find row where values for column is maximal in a pandas DataFrame
...t; import numpy as np
>>> df = pandas.DataFrame(np.random.randn(5,3),columns=['A','B','C'])
>>> df
A B C
0 1.232853 -1.979459 -0.573626
1 0.140767 0.394940 1.068890
2 0.742023 1.343977 -0.579745
3 2.125299 -0.649328 -0.211692
4 -0.187253 1.908618 -...
How to handle multiple heterogeneous inputs with Logstash?
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What's the difference between “Normal Reload”, “Hard Reload”, and ...
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Naming convention for unique constraint
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What's the meaning of 'origin' in 'git push origin master'
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edited Mar 11 '11 at 16:39
answered Mar 11 '11 at 8:49
sk...
Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
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thenengahthenengah
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Why were pandas merges in python faster than data.table merges in R in 2012?
... coerce character to
factor. Factors are still supported. Implements FR#1493, FR#1224
and (partially) FR#951.
New functions chmatch() and %chin%, faster versions of match()
and %in% for character vectors. R's internal string cache is
utilised (no hash table is built). They are about 4 times faster
t...