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Loadbalancing web sockets
...ion is deterministic (using hashed source-IP-port), it will work with TCP (and hence WebSocket).
Also note that a 64k hard limit only applies to outgoing TCP/IP for a given (source) IP address. It does not apply to incoming TCP/IP. We have tested Autobahn (a high-performance WebSocket server) with ...
Rails: What's a good way to validate links (URLs)?
...ffix List, a list maintained by Mozilla. I created a Ruby library to parse and validate domains against the Public Suffix List, and it's called PublicSuffix.
If you want to validate the format of an URI/URL, then you might want to use regular expressions. Instead of searching for one, use the built-...
How to pipe list of files returned by find command to cat to view all the files
I am doing a find and then getting a list of files. How do I pipe it to another utility like cat (so that cat displays the contents of all those files) and basically need to grep something from these files.
...
favicon.png vs favicon.ico - why should I use PNG instead of ICO?
...
Answer replaced (and turned Community Wiki) due to numerous updates and notes from various others in this thread:
ICOs and PNGs both allow full alpha channel based transparency
ICO allows for backwards compatibility to older browsers (e.g. ...
Why does parseInt yield NaN with Array#map?
... with three arguments: the value of the element, the index of the element, and the Array object being traversed."
So if you call a function parseInt which actually expects two arguments, the second argument will be the index of the element.
In this case, you ended up calling parseInt with radix 0...
Android - custom UI with custom attributes
...es or attributes to newly created UI elements (I mean not inherited, but brand new to define some specific behavior I am not able to handle with default propertis or attributes)
...
python ? (conditional/ternary) operator for assignments [duplicate]
C and many other languages have a conditional (aka ternary) operator. This allows you to make very terse choices between two values based on the truth of a condition, which makes expressions, including assignments, very concise.
...
How do I use a PriorityQueue?
... constructor overload which takes a Comparator<? super E> comparator and pass in a comparator which compares in the appropriate way for your sort order. If you give an example of how you want to sort, we can provide some sample code to implement the comparator if you're not sure. (It's pretty ...
How random is JavaScript's Math.random?
For 6 years I've had a random number generator page on my website. For a long time, it was the first or second result on Google for "random number generator" and has been used to decide dozens, if not hundreds of contests and drawings on discussion forums and blogs (I know because I see the referr...
PostgreSQL create table if not exists
...alog.pg_tables
WHERE schemaname = 'myschema'
AND tablename = 'mytable') THEN
RAISE NOTICE 'Table myschema.mytable already exists.';
ELSE
CREATE TABLE myschema.mytable (i integer);
END IF;
END
$func$;
Call:
SELECT create_mytable(); -- call a...