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  • SQLite Oracle Compatibility Layer

    calendar Aug 7, 2018 · 1 min read
     en projects python software-projects sql  · oracle sql sqlite
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    The Sqlite Oracle Compatibility Functions is an experimental compatibility layer for SQLite vs Oracle, written in Python 3.

     

    It aims to provide a minimal compatibility with Oracle. The need was having some regular expression functions, and I do not like to work with risky C code, like this university project did


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  • Emacs Repeat complex command

    calendar Aug 3, 2018 · 1 min read
     en  · cute emacs relax
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    A very useful friend to make a elisp function starting from your….last command

    C-x ESC ESC (translated from C-x <escape> <escape>) runs the command repeat-complex-command (found in global-map), which is an interactive compiled Lisp function in ‘simple.el’.

    It is bound to <again>, <redo>, C-x M-:, C-x M-ESC.


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  • Thinking in Angular 4: Templates

    calendar Jul 28, 2018 · 2 min read
     en featured knowledgebase  · great-ideas javascript javascript-war
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    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
    Binding types other than interpolation have a target name to the left of the equal sign, either surrounded by punctuation ([], ()) or preceded by a prefix (bind-, on-, bindon-).

    The target name is the name of a property. It may look like the name of an attribute but it never is. To appreciate the difference, you must develop a new way to think about template HTML.  


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  • esp8266 webImport

    calendar Jul 19, 2018 · 3 min read
     en esp8266 featured  · esp8266
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    UPDATED and BUGFIXED!

    MicroPython Repl command line is very nice, because you can telnet to the chip and read-and-evaluate python code. It is a great way of learning embedded IoT. The bad thing you cannot copy file while it is running, so experimenting get bad.


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  • The RUP

    calendar Jul 18, 2018 · 2 min read
     en featured software
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    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. From Wikipedia:

    The Rational Unified Process (RUP) is an iterative software development process framework created by the Rational Software Corporation, a division of IBM since 2003.[1] RUP is not a single concrete prescriptive process, but rather an adaptable process framework, intended to be tailored by the development organizations and software project teams that will select the elements of the process that are appropriate for their needs. RUP is a specific implementation of the Unified Process.


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  • Why you need a 27’’ Monitor

    calendar Jul 14, 2018 · 1 min read
     en  · relax
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    After a summer sale rush I got a 27’’ Philips monitor for less than 170 €, preferring it to the 24''

    A 16:9 27’’ monitor give you a lot of space: you eclipse IDE works better because:

    • you actually see the console logs while you edit the code
    • you can split your IDE in 4 and have a quad-view
    • you can open two virtual machine in a remote desktop and have them side by side
    • you get two monitors in one
  • Advertising from over 50 years ago

    calendar Jun 28, 2018 · 1 min read
     en
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    On a Milan advertising panel, after scratching the surface for summer maintenance, a very old advertising (older than me!) come to life:

  • GraphQL and the Inversion of XML (some sort of)

    calendar Jun 12, 2018 · 1 min read
     en featured  · relax
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    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 more

    (Bold are mine, from GraphQL)


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  • And Microsoft Buys GitHub

    calendar Jun 8, 2018 · 1 min read
     en featured humor  · git github relax
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    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….


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  • Docker Shadow of Lights on Raspberry Pi 2/3

    calendar May 20, 2018 · 1 min read
     devops en  · docker raspberrypi
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    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!


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  • IoT Async

    calendar May 17, 2018 · 1 min read
     en erlang esp8266
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    Qualche mese fa avevo sviluppato una applicazione IoT per misurare la temperatura e spedire i dati ad una coda mqtt. Poi c’era uns server che collezionava i dati. Totale: tre server, con tre punti di fallimento ma architettura molto “cool”

    In effetti però la potenza dei moderni chip embedded è tale che è possibile implementare una soluzione completamente asincrona “alla Erlang”. Con meno di 8 euro, potete procuravi il chip esp8266 su Amazon


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

    calendar May 11, 2018 · 2 min read
     en featured software
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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 composed of:


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  • Stereo Sid 2.0.6 update

    calendar May 1, 2018 · 1 min read
     en retro-computing software-projects
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    After a bunch of years, I am happy to announce StereoSID 2.0.6 is here to stay. It spots a new sid_player example and some optimization on the I2C implementation. https://github.com/daitangio/sid-arduino-lib

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

    calendar Apr 4, 2018 · 4 min read
     en featured software
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    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 and the entrire system could be customized.

    The LambdaMoo last version 1.8.3 was a work in progress in 2008. LambdaMoo today is 23 years old.

    So my daemon asked me: if you were able to do a  tech refresh of LambdaMoo, waht will you eventually suggest?

    To respond to this question, I need to study the original code


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  • OpsDev

    calendar Mar 23, 2018 · 2 min read
     devops en humor
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    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

    1. BIGPROJECT is unavailable for all users in the bank
    2. BIGPROJECT2 platform which sits on BIGPROJECT is unavailable this includes the Click-to-chat serviceCurrent Status
    3. Initial attempt of flashback Database to restore from the last good restore point failed due to errors due to absence of flashback logs– this was a quicker option, but now ruled out.
    • Currently going ahead with full restoration in the Primary database – this activity is tentatively supposed to take 8-9 hours (in place of 6 hours earlier mentioned)
    [...manual recovery instruction follows... ]

    After 5 hours in another email they dare to say:


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