Programming languages

runif

May 28, 2020 / English Content, Knowledgebase, Python, Software / ,
Idempotent and minimal python 3 library for rapid scripting. Provide support for creating file, adding data to them, patching and so on. Why? (Ba)sh scripting is very easy to setup. So we end up using it all the time for simple procedural script. Sometimes is it useful to have idempotent script, like Ansible and Saltstack …

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Pybash

May 28, 2020 / English Content, Knowledgebase, Python, Software / ,
The project has been renamed into “runif”. This page left only for Google Search happiness. Pybash is a python library to make python script as easy as in Bourne Again Shell (Bash). Bash scripting is very easy to setup. So we end up using it all the time for simple procedural script. Sometimes is it …

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Avoid Kafka if unsure (think twice series)

December 2, 2019 / English Content, IT Featured, Knowledgebase, Structured Query Language (SQL) / , ,
Some co-workers started using Apache Kafka con a bunch of our Customers. Apache Kafka is a community distributed event streaming platform capable of handling trillions of events a day. Initially conceived as a messaging queue, Kafka is based on an abstraction of a distributed commit log[*]. To get this goal, Apache Kafka needs a complex …

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Rust Programming Language

September 26, 2019 / English Content, Programming languages
I have done a quick peek of the Rust Programming language: it is very popular on Internet, it rivals with Go on the popularity score. Anyway, I find it too much “Haskell-like”, with heavy rules and concept.  

GraalVM

April 16, 2019 / English Content, Java, Programming languages
  GraalVM is a universal virtual machine for running applications written in JavaScript, Python, Ruby, R, JVM-based languages like Java, Scala, Kotli n, Clojure, and LLVM-based languages such as C and C++.GraalVM removes the isolation between programming languages and enables interoperability in a shared runtime. It can run either standalone or in the context of …

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WebAssembly

April 16, 2019 / English Content, Java /
WebAssembly (often shortened to Wasm) is a standard that defines a binary format and a corresponding assembly-like text format for executables used by web pages. [….] WebAssembly code is intended to be run on a portable abstract structured stack machine,[27] which is designed to be faster to parse than JavaScript, as well as faster to execute,[21] and to enable very compact code representation.In …

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SQL: One of the most valuable skills – Craig Kerstiens

February 13, 2020 / English Content, Structured Query Language (SQL) / , , ,
I admit it. I suffered from an “algebra narcoleptic syndrome” during my relational database lessons at University (1996 circa). Ok it is a fake. But it seems so real on these days. I was unable to avoid sleeping. I learned to love SQL after some years and now I think SQL is the most powerful, …

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IoT Async

November 28, 2019 / English Content, Erlang, Esp8266
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 colelzzionava 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 …

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Removing duplicate rows in PostgreSQL, Oracle and SQLite

November 28, 2019 / English Content, Knowledgebase, Structured Query Language (SQL) / , , , , , , ,
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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