Juan Hoyos elhoyos

Extracting from text files

Had the following:

/1-1-1/Screen16/screen.html
/1-1-2/Screen14/screen.html
/1-1-3/Screen12/screen.html
/1-1-3/Screen14/screen.html
/1-3-12/Screen15/screen.html
/1-3-8/Screen10/screen.html

Dealing with Java security message

This is what appear:

Java has discovered application components that could indicate a security concern. Contact the application vendor to ensure that it has not been tampered with.

Block potentially unsafe components from being run?

The reason

According to [Java][1] its because an Applet or a Java Web Start application contains mixed code (signed and unsigned).

Am I visible?

How to know when an element is visible to the user.

Here're some solutions to this:

Thread-safe code in Rails

It's not hard to write thread-safe code in a Rails application. Simple rules will save any app:

Don't share mutable state If you must share mutable state, mutex around all accesses to it

rails/rails#6685 (comment)

If config.threadsafe! is enabled and code is Non-threadsafe

	// Type in a mongoshell
	// Credits: http://stackoverflow.com/questions/3788256/mongodb-updating-documents-using-data-from-the-same-document/3792958#3792958

	db.currencies.find({symbol: "$"}).snapshot().forEach(
	function (e) {
	e.customSymbol = e.code.substr(0, 2) + e.customSymbol;
	db.currencies.save(e);
	}
	);

	var heapdump = require("heapdump");

	function handleCallback(err) {
	callback(err);
	gc();
	process.nextTick(function () {
	heapdump.writeSnapshot('/var/local/' + Date.now() + '.heapsnapshot', function() {
	console.log('dump complete');
	});
	});

	$ mongodump -d some_database -c some_collection
	$ mongorestore -d some_other_db -c some_or_other_collection dump/some_collection.bson

	{
	"dependencies": {
	"heapdump": "^0.2.10"
	}
	}