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How can mixed data types (int, float, char, etc) be stored in an array?
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@texasbruce also called a "tagged union". I'm using this technique too in my own language. ;)
– user529758
Sep 2 '13 at 16:50
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Approximate cost to access various caches and main memory?
...xample, check page 22 for some timings & cycles for example).
Additionally, this page has some details on clock cycles etc. The second link served the following numbers:
Core i7 Xeon 5500 Series Data Source Latency (approximate) [Pg. 22]
local L1 CACHE hit, ...
How to implement a rule engine?
...Rules = rules.Select(r => CompileRule(r)).ToList();
public bool MatchesAllRules(User user)
{
return compiledRules.All(rule => rule(user));
}
Here is the implementation of BuildExpr:
Expression BuildExpr(Rule r, ParameterExpression param)
{
var left = MemberExpression.Property(param, ...
Why is nginx responding to any domain name?
I have nginx up and running with a Ruby/Sinatra app and all is well. However, I'm now trying to have a second application running from the same server and I noticed something weird. First, here's my nginx.conf:
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`Apache` `localhost/~username/` not working
...s:
<Directory "/Users/kevin/Sites/">
Options Indexes MultiViews
AllowOverride None
Require all granted
</Directory>
Make sure to restart the Apache server afterwards with:
sudo apachectl restart
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No ConcurrentList in .Net 4.0?
...read-safe, limited subset of IList<T>: in particular, one that would allow an Add and provide random read-only access by index (but no Insert, RemoveAt, etc., and also no random write access).
This was the goal of my ConcurrentList<T> implementation. But when I tested its performance in...
Where can I learn how to write C code to speed up slow R functions? [closed]
...ds C++ and Rcpp to be much more like writing R than writing C++. YMMV and all that.
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How to permanently set $PATH on Linux/Unix? [closed]
...t. The actual solution depends on the purpose.
The variable values are usually stored in either a list of assignments or a shell script that is run at the start of the system or user session. In case of the shell script you must use a specific shell syntax and export or set commands.
System wide
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How to set JAVA_HOME in Linux for all users
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For all users, I would recommend placing the following line in /etc/profile
export JAVA_HOME=$(readlink -f /usr/bin/javac | sed "s:/bin/javac::")
This will update dynamically and works well with the alternatives system. Do not...
How to set the JDK Netbeans runs on?
...\netbeans.conf
Change the following line to point it where your java installation is :
netbeans_jdkhome="C:\Program Files\Java\jdk1.7xxxxx"
You may need Administrator privileges to edit netbeans.conf
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