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Does pandas iterrows have performance issues?
...
Mateen Ulhaq
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answered Jul 21 '14 at 17:39
JeffJeff
1...
How to strip all non-alphabetic characters from string in SQL Server?
...ier I just used the Powershell script below, this example if for a VARCHAR(64):
1..64 | % {
" + CASE WHEN a NOT LIKE '%' + SUBSTRING(x, {0}, 1) + '%' THEN '' ELSE SUBSTRING(x, {0}, 1) END" -f $_
} | clip.exe
Upload artifacts to Nexus, without Maven
...accomplish this. Where profile is your sonatype/nexus profileID (such as 4364f3bbaf163) and repo (such as comdorkbox-1003) are parsed from the response when you upload your initial POM/Jar.
Close repo:
/**
* Closes the repo and (the server) will verify everything is correct.
* @throws IOExceptio...
Simple proof that GUID is not unique [closed]
...til the heat death of the universe.
for (long k = 0; k < Int64.MaxValue; k++)
{
for (long j = 0; j < Int64.MaxValue; j++)
{
Console.WriteLine("{0:u} - Looking for collisions with {1} thread(s)....", DateTime.Now, Envir...
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...).
# ~ % ruby -v
# => ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-darwin13.0]
irb(main):038:0> Benchmark.measure do
irb(main):039:1* ["1318996912", "1318496912"].each do |s|
irb(main):040:2* DateTime.strptime(s, '%s')
irb(main):041:2> end
irb(main):042:1> end
=> #&l...
get list from pandas dataframe column
...a 1.0 1
b 2.0 2
c 3.0 3
d NaN 4
column types:
one float64
two int64
dtype: object
col_one_list:
[1.0, 2.0, 3.0, nan]
type:<class 'list'>
col_one_arr:
[ 1. 2. 3. nan]
type:<class 'numpy.ndarray'>
...
.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...nstration: again, linked here) - though this is a result compounded by the 64-bit machine. This difference really demonstrates two things: first (1), a boxed Int32-type "object" (ArrayList) is much bigger than a pure Int32 primitive type (List); second (2), the difference is exponential as a result ...
best way to preserve numpy arrays on disk
...
64
I'm a big fan of hdf5 for storing large numpy arrays. There are two options for dealing with hd...
Generate class from database table
... WHEN 'bigint' THEN CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Int64?'
ELSE 'Int64'
END
WHEN 'binary' THEN 'Byte[]'
WHEN 'bit' THEN CASE C.IS_NULLABLE
WHEN 'YES' THEN 'bool?'
ELSE 'bool'
END
WHEN 'char' THEN 'st...
Legality of COW std::string implementation in C++11
... Dave SDave S
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4
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