henri

def calculate_area(width, height)
  raise TypeError, "Width must be a number" unless width.is_a?(Numeric)
  raise TypeError, "Height must be a number" unless height.is_a?(Numeric)

  raise ArgumentError, "Width must be positive" unless width > 0
  raise ArgumentError, "Height must be positive" unless height > 0

  width * height
end

henri

Browser Cheatsheets

This set of cheat sheets is designed to assist you with using various browsers. Little tips and trickes may not know and which I will not remember. Leave a comment or start a discussion if you have something good to add to the list.

Links

• SPB Browser Notes

henri

#!/usr/bin/env bash

# memory monitor script
# Henri Shustak
# (C) 2022 GNU GPL v3 or later

# basic path setup (good for most systems)
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

# settings (this could be improved to use percentages)...

henri

#!/bin/bash

rsync "$@" 2> >(grep -v vanished)
ret=$?
((ret==24)) && exit 0 || exit $ret

henri

#!/bin/bash

#(C) Henri Shustak 2000
# Released Under the GNU GPLv3 or later
# https://www.gnu.org/licenses/gpl.html

# This script will batch process mkv files (or something else if you modify) and use handbreak (or something else) 
# in order to reduce the quaility or convert the format. It will work on these files sequentially and
# keep tabs. If you need to carry on beyond restarts, then it would pay to alter the log file location
# so it is not deleted between reboots.

henri

#!/bin/bash
#
# (C)2020 Henri Shustak
# Released Under the MIT Licence
# https://mit-license.org/
#
# dump the crontab

user_name=$(whoami)
host_name=$(hostname)

henri

# create a compressed archive from a number of sources
tar -czf compressed-archive.tar.gz /srv/source1 /srv/source2 # ...

# list all .txt files in archive (better if you are hunting into large archives)
tar -tf archive.tar --wildcards '*.txt'
tar -tzf archive.tar.gz --wildcards '*.txt'

# it is possible to use third party tools to mount or explore a compressed tar archive
# eg : 
#       - https://github.com/mxmlnkn/ratarmount

henri

People

:bowtie:	😄 :smile:	😆 :laughing:
😊 :blush:	😃 :smiley:	☺️ :relaxed:
😏 :smirk:	😍 :heart_eyes:	😘 :kissing_heart:
😚 :kissing_closed_eyes:	😳 :flushed:	😌 :relieved:
😆 :satisfied:	😁 :grin:	😉 :wink:
😜 :stuck_out_tongue_winking_eye:	😝 :stuck_out_tongue_closed_eyes:	😀 :grinning:
😗 :kissing:	😙 :kissing_smiling_eyes:	😛 :stuck_out_tongue:

henri

#!/usr/bin/env bash

set -euo pipefail

TRIES=0
until [ $TRIES -eq 10 ] || nc -z localhost 3000; do
    sleep 0.1

    TRIES=$(( TRIES+1 ))
done

henri

require 'csv'
require 'open-uri'

file = "Workbook3.csv"

content = CSV.read(open(file), encoding: 'ISO-8859-1:UTF-8', col_sep: ";")

File.open("output.csv", "w") do |f|
  rows = content.map { |row| "\"#{row.join('","')}\"" }.join("\n")
  f.puts(rows)