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In a language with inheritance the following code would print "Child". But in Go the following prints "Parent".

package main

import (
    "fmt"
)

type Hello interface {

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package main

import (
	"fmt"
	"reflect"
)

var need_bool = func(b bool) { fmt.Printf("need_bool: %v", b) }

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Debug expressions in Scheme

The following can be used to inspect applications and values.

(define-syntax ?
  (syntax-rules ()
    ((_ (proc arg0 arg1 ...))
     (let* ((args (list arg0 arg1 ...))
	    (result (apply proc args)))
       (format (current-error-port)
 ";; (~s~{ ~s~}) => ~s\n"

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Essentielle Aminosäuren

Quellen:

• http://www.vitalstoff-lexikon.de/
• https://de.wikipedia.org/wiki/Essentielle_Aminos%C3%A4ure

Histidin

Tagesbedarf: 10 mg pro kg Körpergewicht

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/sbin/rcvboxadd quicksetup all

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Store Syslog in Postgresql

The following describes how to configure Rsyslog to write all syslog messages into a Postgresql database.

This description requires at least Rsyslog 8.2302. If you are using Debian you need at least Debian 12 for this.

This setup uses UNIX domain socket authentiation. This has the advantage that the configuration files of Rsyslog do not contain any database password. It has the disadvantage, that the database must be running on the same system

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Migrate Postgresql 13 to 15

Check which cluster uses which port

# fuser -v /run/postgresql/.s.*
                     USER        PID ACCESS COMMAND
/run/postgresql/.s.PGSQL.5432:
                     postgres    653 F.... postgres
/run/postgresql/.s.PGSQL.5433:
 postgres 652 F.... postgres

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;; Implementation of the presentation "Regex to NFA Conversion Isn't
;; Hard! (Sipser 1.28a)" available at https://youtu.be/VbR1mGdP99s for
;; Chez Scheme Version 9.5.4.
;;
;; Usage: scheme --script rx2nfa.scm | dot -Tsvg > nfa.svg

;; Functions lacking in R6RS.

(define (make-equal-hashtable)
  (make-hashtable equal-hash equal?))

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function mapo (obj, proc)
{
  return Object.fromEntries(Object.entries(obj).map(proc))
}

function mixin(mixture, condiment)
{
  for (const name in condiment)
    Object.defineProperty(mixture, name, condiment[name])
  return mixture

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function coerce_boolean_correctly (arg) {
  if (arg instanceof Boolean)
    return coerce_boolean_correctly(arg.valueOf())
  return !!arg
}