Nära 4 500 migranter har kommit till Sicilien de senaste tre dagarna. Den plötsliga flyktingströmmen över Medelhavet saknar motstycke, enligt internationella migrationsorganisationen IOM. En stor räddningsaktion pågår i havet söder om Sicilien.

En 23-årig man i Karlstad åtalas för barnvåldtäkter och övergrepp mot barn som begicks under perioden 2007-2013, skriver gt.se.

Jim_Austin writes "At a press conference this week, in response to a question by a Science Careers reporter, Scott Corley, the Executive Director of immigration-reform group Compete America, argued that retraining workers doesn't make sense for IT companies. For the company, he argued, H-1B guest workers are a much better choice. 'It's not easy to retrain people,' Corley said. 'The further you get away from your education the less knowledge you have of the new technologies, and technology is always moving forward.'"

Read more of this story at Slashdot.

Country's defense minister considers use of underwater technology after efforts fail to find objects on satellite image.

Vårens framfart har mött många bakslag. Men än så länge har det varit en onormalt varm vår i hela landet och nu spås behagligt väder.

lpress writes: "Turkish Prime Minister Recep Tayyip Erdogan, who has been embarrassed by social media over corruption, vowed yesterday to 'eradicate Twitter.' He followed through by cutting off access, but users soon found work-arounds like posting by email and using VPNs. The hashtag #TwitterOlmadanYaayamam (I can't live without Twitter) quickly rose to the top of Twitter's worldwide trending topics."

Read more of this story at Slashdot.

Extensible, high performance object-relational mapper (ORM).

Provides POSIX filesystem semantics in pure Perl

Template Renderer Plugin for Mojolicious

Simplify Grammar::Graph objects

Brazilian phone numbers

How far have your fingers ran?

Interface to IMultiLanguage I18N routines

I didn’t think about calculated properties in my recent post on immutable objects.

I suspect I’m not alone in never feeling all that great about calculated properties. You either calculate them on-demand every time — which is fine if performance is not an issue and you don’t need to make them observable — or you calculate them when the data they depend on changes.

The latter is a pain and requires some special fiddling with KVO, notifications, custom accessors, and so on. (Do Core Data users use awakeFromInsert and awakeFromFetch? I always avoided this particular topic with Core Data.)

Not that it’s all that hard. I just don’t like that particular code.

But with immutable objects, it’s so simple: calculate on-demand just once. Since the data doesn’t change, there’s no need to set up recalculation machinery. So clean.