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#!/bin/bash

if [[ ! $1 ]]; then
    echo -e "Usage:\n\n\t$0 'file name'"
    exit 1
fi

f=$(file 2>/dev/null /proc/*/fd/* | awk '$NF == "(deleted)"{print $(NF-1)}')

if [[ $f ]]; then

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Intro

Lack of firmware upgrades may cause various unpredicted issues, in my case it was freezing tailing windows manager.

Upgrade rutine

Get the utility - fwupdate - tools for using the ESRT and UpdateCapsule() to apply firmware update

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pi@pi3:~ $ history 
    1  passwd
    2  sudo raspi-config 
    3  reboot
    4  sudo reboot
    5  sudo nano /etc/network/interfaces
    6  reboot
    7  sjudo reboot
    8  sudo reboot
    9  ping wp.pl

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<rule ref="rulesets/java/basic.xml">
<exclude name="JumbledIncrementer"/>
<exclude name="ForLoopShouldBeWhileLoop"/>
<exclude name="OverrideBothEqualsAndHashcode"/>
<exclude name="DoubleCheckedLocking"/>
<exclude name="ReturnFromFinallyBlock"/>
<exclude name="UnconditionalIfStatement"/>
<exclude name="BooleanInstantiation"/>
<exclude name="CollapsibleIfStatements"/>
<exclude name="ClassCastExceptionWithToArray"/>

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Technology POC

• Your first microservices using Scala&Lagom's Javadsl Lagom Akka Casandra sbt

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tools

basic info

jcmd <PID> PerfCounter.print

thread dump

jcmd <PID> Thread.print

enable jmx

jcmd ManagementAgent.start

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# basic info
jcmd <PID> PerfCounter.print

# thread dump
jcmd <PID> Thread.print

# enable jmx
jcmd <PID> ManagementAgent.start

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• API Browser ZEAL
• Slack ScudCloud
• Slack PlaidChat

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FP

• For-comprehension Macgyver, code

• [Functional Programming is Terrible] (https://www.youtube.com/watch?v=hzf3hTUKk8U)

• Miles Sabin - Fighting SI-2712 with dependent types and type level continuation passing

Higher -Order Kind

• Generics of a Higher Kind (Paper)

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- key promoter