IT Featured

IT Featured Articles on cool technologies, focused on System Administration and Programming Languages

Thinking in Angular 4: Templates

To understand Angular 4, after the “Hero” tutorial you should start from the Template syntax.  We highlighted some statement in red below: Data direction Syntax Type One-way from data source to view target {{expression}} [target]=”expression” bind-target=”expression” Interpolation Property Attribute Class Style One-way from view target to data source (target)=”statement” on-target=”statement” Event Two-way [(target)]=”expression” bindon-target=”expression” Two-way …

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The RUP

Because some friend of mine did not know about RUP, and deal with waterfall process, I decided to make a small recall for all poor young Project Manager dealing with bad developers, bad consultants and so on, out of there,   The Rational Unified Process (RUP) is an iterative software development process framework created by the Rational Software Corporation, a division of IBM since …

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GraphQL and the Inversion of XML (some sort of)

I stumbled upon John Resing’s GraphQL (jQuery creator, by the way): GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. GraphQL provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need and nothing …

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And Microsoft Buys GitHub

An year ago, we discovered MSWindows was developed on Git as revision control System On this week, Microsoft decided to buy GitHub. I suppose they had a tons on projects on GitHub platform already! By the way, GitLab (the first competitor) now offers the Enterprise edition to open source project….

Docker Shadow of Lights on Raspberry Pi 2/3

Cloud, DevOps, and Microservices are three strong forces are melting together. Containers is the key technology around them. Before docker, horizontal scaling via VM spinning was feasible but a slow speed, compared to the speed of a docker container boot. So do you want to learn docker without going out of business? Let’s go! So if …

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Exploring a 23 years old code base: LambdaMoo MUD Part 2

In this second article I will continue my jorney on LambdaMoo code base. The C code is very well written. Sometimes the API abuse global variable to avoid passing around identifier like output database file descriptor or the like. Because a lot of the system has been written in the Moo language, the core is …

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Let’s Encrypt Gioorgi!

At last, Gioorgi.com too become part of Let’s Encrypt . You can enjoy full SSL super encrypted website from today. We will leave the no-SSL version for a while, to let you choose between the fast and the secure.

Exploring a 23 years old code base: LambdaMoo MUD Part 1

On these days my greek daemon (the one which talk to me about deep nerd programming) was interested on LambdaMoo. LambdaMoo is an Object Oriented Multi User Dungeon born back in 1995. A MUD was a text based system you log in, talk with other, create adventures and so on. LambdaMoo has a script language …

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OpsDev

From an internal email of a very very big corporate company Incident Background: BIGPROJECT has been unavailable since APAC SOD due to a data refresh activity being wrongly triggered in from UAT to Production environments. Business Impact BIGPROJECT is unavailable for all users in the bank BIGPROJECT2 platform which sits on BIGPROJECT is unavailable this …

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Docker & containers: uso ideale

Docker is a tool that can package an application and its dependencies in a virtual container that can run on any Linux server. This helps enable flexibility and portability on where the application can run, whether on premises, public cloud, private cloud, bare metal, etc. Da https://en.wikipedia.org/wiki/Docker_(software) Docker e la “containerizzazione” sono l’evoluzione di due tecnologie molto “antiche”:

Evolution of Service Architecture

Assembly: the only way In principle there was only one: assembly machine language. Hardware and software engineer was a one-role. The guy who was able to project a chip, was the one who was able to program it. Then Fortan (1957), the first high level language compiler was created. C the write once of ’70 …

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L’ovviologo

Ci sono una nuova generazione di “nullasapienti”, persone che con una inutile laurea (tipicamente in legge) diventano giornalisti dilettanti, seguono i trend della “blogosfera” e leggono magari qualche bel libro di comunicazione. Il risultato è che pubblicano video che non sono scontati, non sono banali ma non sono neppure perle di saggezza. Sono ovvi. La …

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Removing duplicate rows in PostgreSQL, Oracle and SQLite

Sometimes you need to remove nasty duplicate on a table, based on a subset of the column. On every big database there is something called “rowid” which can be used to indentify a column in a unique way. On PostgreSQL is called ctid, as we shall see: Oracle way: DELETE FROM your_table WHERE rowid not …

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