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Why is quicksort better than mergesort?
... algorithm’s runtime, and, when taking them all together, quicksort wins out.
In particular, the often-quoted runtime of sorting algorithms refers to the number of comparisons or the number of swaps necessary to perform to sort the data. This is indeed a good measure of performance, especially si...
How can I truncate a datetime in SQL Server?
...ong, for two reasons: 1)it might not work across all locales and 2) it's about the slowest possible way to do this... and not just a little; it's like an order of magnitude or two slower than the other options.
Update This has been getting some votes lately, and so I want to add to it that sinc...
What is Haskell used for in the real world? [closed]
...e object deep in the call
hierarchy decided the message is flawed? How about having a history of
different states?
Many housekeeping tasks made for you: deconstructing data structures (PatternMatching), storing variable bindings (LexicalScope with
closures), strong typing (TypeInference), Ga...
How to take screenshot of a div with JavaScript?
...
Thanks!! I don't know anything about canvas, but I will learn it. How would I use the Canvas 2D drawing effects? Could you assist me with this? Thanks so much! :)
– Nathan
Jul 31 '11 at 3:35
...
How to search by key=>value in a multidimensional array in PHP
...ay(id=>3,name=>"cat 1"));
print_r(search($arr, 'name', 'cat 1'));
Output:
Array
(
[0] => Array
(
[id] => 1
[name] => cat 1
)
[1] => Array
(
[id] => 3
[name] => cat 1
)
)
If efficie...
how do I insert a column at a specific column index in pandas?
...column, value)
df = pd.DataFrame({'B': [1, 2, 3], 'C': [4, 5, 6]})
df
Out:
B C
0 1 4
1 2 5
2 3 6
idx = 0
new_col = [7, 8, 9] # can be a list, a Series, an array or a scalar
df.insert(loc=idx, column='A', value=new_col)
df
Out:
A B C
0 7 1 4
1 8 2 5
2 9 3 6
...
How to find the installed pandas version
...pandas.__version__:
In [76]: import pandas as pd
In [77]: pd.__version__
Out[77]: '0.12.0-933-g281dc4e'
Pandas also provides a utility function, pd.show_versions(), which reports the version of its dependencies as well:
In [53]: pd.show_versions(as_json=False)
INSTALLED VERSIONS
--------------...
Difference between Service, Async Task & Thread?
...
Probably you already read the documentation description about them, I won't repeat them, instead I will try to give answer with my own words, hope they will help you.
Service is like an Activity but has no user interface. Probably if you want to fetch the weather for example you w...
How to kill zombie process
...If the zombie is a dead process (already killed), how I remove it from the output of ps aux?
– MOHAMED
Jun 5 '13 at 16:19
...
How to concatenate text from multiple rows into a single text string in SQL server?
...
Depending on what behavior you want (the first option just filters NULLs out, the second option keeps them in the list with a marker message [replace 'N/A' with whatever is appropriate for you]).
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