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Increasing the maximum number of TCP/IP connections in Linux
... range, and decrease the tcp_fin_timeout
To find out the default values:
sysctl net.ipv4.ip_local_port_range
sysctl net.ipv4.tcp_fin_timeout
The ephermal port range defines the maximum number of outbound sockets a host can create from a particular I.P. address. The fin_timeout defines the minimu...
How to calculate the number of days between two dates? [duplicate]
... in milliseconds
const differenceMs = Math.abs(date1 - date2);
// Convert back to days and return
return Math.round(differenceMs / ONE_DAY);
}
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Building big, immutable objects without using constructors having long parameter lists
...to it's mutable interface. The separate class approach requires methods to convert back and forth. The JodaTime API uses this pattern. See DateTime and MutableDateTime.
– toolbear
Aug 12 '11 at 20:40
...
from list of integers, get number closest to a given value
...t; myList[pos]
...
44
To get the value that's closest to 5 you could try converting the list to an array and using argmin from numpy like so.
>>> import numpy as np
>>> myNumber = 5
>>> myList = [1, 3, 4, 44, 88]
>>> myArray = np.array(myList)
>>> ...
Setting up a deployment / build / CI cycle for PHP projects
...
I am mostly a sys admin but sometimes I code PHP as well. As a side project I created some scripts that will make it simple and painless to set up a full blown PHP CI environment using Jenkins. It also runs a sample project for you so you ...
java.nio.file.Path for a classpath resource
...scheme.equals("jar")) {
throw new IllegalArgumentException("Cannot convert to Path: " + uri);
}
String s = uri.toString();
int separator = s.indexOf("!/");
String entryName = s.substring(separator + 2);
URI fileURI = URI.create(s.substring(0, separator));
FileSystem...
pdftk compression option
...duced the size of my uncompressed PDF dramatically.
Pixelated (lossy):
convert input.pdf -compress Zip output.pdf
Unpixelated (lossless, but may display slightly differently):
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dBATCH -dQUIET -sOutputFile=output.pdf...
Write a number with two decimal places SQL server
...
try this
SELECT CONVERT(DECIMAL(10,2),YOURCOLUMN)
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How do I get a raw, compiled SQL query from a SQLAlchemy expression?
...ile_query(query):
from sqlalchemy.sql import compiler
from MySQLdb.converters import conversions, escape
dialect = query.session.bind.dialect
statement = query.statement
comp = compiler.SQLCompiler(dialect, statement)
comp.compile()
enc = dialect.encoding
params = []...
What's the recommended approach to resetting migration history using Django South?
... rm -r appname/migrations/
./manage.py reset south
./manage.py convert_to_south appname
(Notice that the “reset south” part clears migration records for ALL apps, so make sure you either run the other two lines for all apps or delete selectively).
The convert_to_south cal...