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Java HashMap performance optimization / alternative
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One thing I notice in your hashCode() method is that the order of the elements in the arrays a[] and b[] don't matter. Thus (a[]={1,2,3}, b[]={99,100}) will hash to the same value as (a[]={3,1,2}, b[]={100,99}). Actually all keys k1 and k2 where sum(k1.a)==sum(k2.a) and sum(k1.b)=s...
How to attach javadoc or sources to jars in libs folder?
...ers from Xavier, plastiv, VinceFR and Christopher.
Step by step guide
In order to link the sources and javadoc to a .jar library that is automatically linked by Eclipse you have to do the following:
Place the library .jar file in the libs folder, and the associated source .jar and doc .jar files...
How to trim whitespace from a Bash variable?
...ce it's much faster, avoiding any fork(). On Cygwin difference in speed is orders of magnitude.
– Gene Pavlovsky
Jul 3 '16 at 9:33
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Can you run GUI applications in a Docker container?
... > /etc/apt/sources.list
RUN apt-get update
# Install vnc, xvfb in order to create a 'fake' display and firefox
RUN apt-get install -y x11vnc xvfb firefox
RUN mkdir ~/.vnc
# Setup a password
RUN x11vnc -storepasswd 1234 ~/.vnc/passwd
# Autostart firefox (might not be the best way...
Is the SQL WHERE clause short-circuit evaluated?
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ANSI SQL Draft 2003 5WD-01-Framework-2003-09.pdf
6.3.3.3 Rule evaluation order
[...]
Where the precedence is not determined by the Formats or by
parentheses, effective evaluation of expressions is generally
performed from left to right. However, it is
implementation-dependent whether expressions a...
What is the correct MIME type to use for an RSS feed?
...ood choice, as it states that it accepts RSS, Atom, and XML (in descending order or preference).
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Transport endpoint is not connected
...=15 root@myremoteserver.com:/var/lib/redmine/plugins /mnt -p 12345 -C
In order to use allow_other above, you need to uncomment the last line in /etc/fuse.conf:
# Set the maximum number of FUSE mounts allowed to non-root users.
# The default is 1000.
#
#mount_max = 1000
# Allow non-root users to ...
What does Provider in JAX-RS mean?
...f them as plugins that (potentially) alter the behavior of the runtime, in order to accomplish a set of (program defined) goals.
Providers are not the same as resources classes, they exist, conceptually, at a level in-between resources classes and the JAX-RS implementation. If it helps, you can thi...
How do I prevent site scraping? [closed]
... to GitHub to read the extended version, with more tips and details.
In order to hinder scraping (also known as Webscraping, Screenscraping, Web data mining, Web harvesting, or Web data extraction), it helps to know how these scrapers work, and
, by extension, what prevents them from working wel...
Composer killed while updating
...wer, I've had to increase my virtual machine's memory to at least 768MB in order to get composer update to work in some situations.
However, if you're doing this on a live server, you shouldn't be using composer update at all. What you should instead do is:
Run composer update in a local environmen...