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+# Random Weird Things - Part Ⅰ
+
+> Published at 2024-07-05T10:59:59+03:00; Updated at 2025-02-08
+
+Every so often, I come across random, weird, and unexpected things on the internet. I thought it would be neat to share them here from time to time. As a start, here are ten of them.
+
+<< template::inline::index random-weird-things
+
+```
+		       /\_/\
+WHOA!! 	     ( o.o )
+		       > ^ <
+		      /  -  \
+		    /        \
+		   /______\  \
+```
+
+<< template::inline::toc
+
+## 1. `bad.horse` traceroute
+
+Run traceroute to get the poem (or song).
+
+> Update: A reader hinted that by specifying `-n 60`, there will be even more output!
+
+```bash
+❯ traceroute -m 60 bad.horse
+traceroute to bad.horse (162.252.205.157), 60 hops max, 60 byte packets
+ 1  _gateway (192.168.1.1)  5.237 ms  5.264 ms  6.009 ms
+ 2  77-85-0-2.ip.btc-net.bg (77.85.0.2)  8.753 ms  7.112 ms  8.336 ms
+ 3  212-39-69-103.ip.btc-net.bg (212.39.69.103)  9.434 ms  9.268 ms  9.986 ms
+ 4  * * *
+ 5  xe-1-2-0.mpr1.fra4.de.above.net (80.81.194.26)  39.812 ms  39.030 ms  39.772 ms
+ 6  * ae12.cs1.fra6.de.eth.zayo.com (64.125.26.172)  123.576 ms *
+ 7  * * *
+ 8  * * *
+ 9  ae10.cr1.lhr15.uk.eth.zayo.com (64.125.29.17)  119.097 ms  119.478 ms  120.767 ms
+10  ae2.cr1.lhr11.uk.zip.zayo.com (64.125.24.140)  120.398 ms  121.147 ms  120.948 ms
+11  * * *
+12  ae25.mpr1.yyz1.ca.zip.zayo.com (64.125.23.117)  145.072 ms *  181.773 ms
+13  ae5.mpr1.tor3.ca.zip.zayo.com (64.125.23.118)  168.239 ms  168.158 ms  168.137 ms
+14  64.124.217.237.IDIA-265104-ZYO.zip.zayo.com (64.124.217.237)  168.026 ms  167.999 ms  165.451 ms
+15  * * *
+16  t00.toroc1.on.ca.sn11.net (162.252.204.2)  131.598 ms  131.308 ms  131.482 ms
+17  bad.horse (162.252.205.130)  131.430 ms  145.914 ms  130.514 ms
+18  bad.horse (162.252.205.131)  136.634 ms  145.295 ms  135.631 ms
+19  bad.horse (162.252.205.132)  139.158 ms  148.363 ms  138.934 ms
+20  bad.horse (162.252.205.133)  145.395 ms  148.054 ms  147.140 ms
+21  he.rides.across.the.nation (162.252.205.134)  149.687 ms  147.731 ms  150.135 ms
+22  the.thoroughbred.of.sin (162.252.205.135)  156.644 ms  155.155 ms  156.447 ms
+23  he.got.the.application (162.252.205.136)  161.187 ms  162.318 ms  162.674 ms
+24  that.you.just.sent.in (162.252.205.137)  166.763 ms  166.675 ms  164.243 ms
+25  it.needs.evaluation (162.252.205.138)  172.073 ms  171.919 ms  171.390 ms
+26  so.let.the.games.begin (162.252.205.139)  175.386 ms  174.180 ms  175.965 ms
+27  a.heinous.crime (162.252.205.140)  180.857 ms  180.766 ms  180.192 ms
+28  a.show.of.force (162.252.205.141)  187.942 ms  186.669 ms  186.986 ms
+29  a.murder.would.be.nice.of.course (162.252.205.142)  191.349 ms  191.939 ms  190.740 ms
+30  bad.horse (162.252.205.143)  195.425 ms  195.716 ms  196.186 ms
+31  bad.horse (162.252.205.144)  199.238 ms  200.620 ms  200.318 ms
+32  bad.horse (162.252.205.145)  207.554 ms  206.729 ms  205.201 ms
+33  he-s.bad (162.252.205.146)  211.087 ms  211.649 ms  211.712 ms
+34  the.evil.league.of.evil (162.252.205.147)  212.657 ms  216.777 ms  216.589 ms
+35  is.watching.so.beware (162.252.205.148)  220.911 ms  220.326 ms  221.961 ms
+36  the.grade.that.you.receive (162.252.205.149)  225.384 ms  225.696 ms  225.640 ms
+37  will.be.your.last.we.swear (162.252.205.150)  232.312 ms  230.989 ms  230.919 ms
+38  so.make.the.bad.horse.gleeful (162.252.205.151)  235.761 ms  235.291 ms  235.585 ms
+39  or.he-ll.make.you.his.mare (162.252.205.152)  241.350 ms  239.407 ms  238.394 ms
+40  o_o (162.252.205.153)  246.154 ms  247.650 ms  247.110 ms
+41  you-re.saddled.up (162.252.205.154)  250.925 ms  250.401 ms  250.619 ms
+42  there-s.no.recourse (162.252.205.155)  256.071 ms  251.154 ms  255.340 ms
+43  it-s.hi-ho.silver (162.252.205.156)  260.152 ms  261.775 ms  261.544 ms
+44  signed.bad.horse (162.252.205.157)  262.430 ms  261.410 ms  261.365 ms
+```
+
+## 2. ASCII cinema
+
+Fancy watching Star Wars Episode IV in ASCII? Head to the ASCII cinema:
+
+=> https://asciinema.org/a/569727 
+
+## 3. Netflix's Hello World application
+
+Netflix has got the Hello World application run in production 😱
+
+*  https://www.Netflix.com/helloworld
+ 
+> By the time this is posted, it seems that Netflix has taken it offline... I should have created a screenshot!
+
+## C programming
+
+### 4. Indexing an array
+
+In C, you can index an array like this: `array[i]` (not surprising). But this works as well and is valid C code: `i[array]`, 🤯 It's because after the spec `A[B]` is equivalent to `*(A + B)` and the ordering doesn't matter for the `+` operator. All 3 loops are producing the same output. Would be funny to use `i[array]` in a merge request of some code base on April Fool's day!
+
+```c
+#include <stdio.h>
+
+int main(void) {
+  int array[5] = { 1, 2, 3, 4, 5 };
+
+  for (int i = 0; i < 5; i++)
+    printf("%d\n", array[i]);
+
+  for (int i = 0; i < 5; i++)
+    printf("%d\n", i[array]);
+
+  for (int i = 0; i < 5; i++)
+    printf("%d\n", *(i + array));
+}
+```
+
+### 5. Variables with prefix `$`
+
+In C you can prefix variables with `$`! E.g. the following is valid C code 🫠:
+
+```c
+#include <stdio.h>
+
+int main(void) {
+  int $array[5] = { 1, 2, 3, 4, 5 };
+
+  for (int $i = 0; $i < 5; $i++)
+    printf("%d\n", $array[$i]);
+
+  for (int $i = 0; $i < 5; $i++)
+    printf("%d\n", $i[$array]);
+
+  for (int $i = 0; $i < 5; $i++)
+    printf("%d\n", *($i + $array));
+}
+```
+
+## 6. Object oriented shell scripts using `ksh`
+
+Experienced software developers are aware that scripting languages like Python, Perl, Ruby, and JavaScript support object-oriented programming (OOP) concepts such as classes and inheritance. However, many might be surprised to learn that the latest version of the Korn shell (Version 93t+) also supports OOP. In ksh93, OOP is implemented using user-defined types:
+
+```ksh
+#!/usr/bin/ksh93
+ 
+typeset -T Point_t=(
+    integer -h 'x coordinate' x=0
+    integer -h 'y coordinate' y=0
+    typeset -h 'point color'  color="red"
+
+    function getcolor {
+        print -r ${_.color}
+    }
+
+    function setcolor {
+        _.color=$1
+    }
+
+    setxy() {
+        _.x=$1; _.y=$2
+    }
+
+    getxy() {
+        print -r "(${_.x},${_.y})"
+    }
+)
+ 
+Point_t point
+ 
+echo "Initial coordinates are (${point.x},${point.y}). Color is ${point.color}"
+ 
+point.setxy 5 6
+point.setcolor blue
+ 
+echo "New coordinates are ${point.getxy}. Color is ${point.getcolor}"
+ 
+exit 0
+```
+
+=> https://blog.fpmurphy.com/2010/05/ksh93-using-types-to-create-object-orientated-scripts.html Using types to create object oriented Korn shell 93 scripts
+
+## 7. This works in Go
+
+There is no pointer arithmetic in Go like in C, but it is still possible to do some brain teasers with pointers 😧:
+
+```go
+package main
+
+import "fmt"
+
+func main() {
+	var i int
+	f := func() *int {
+		return &i
+	}
+	*f()++
+	fmt.Println(i)
+}
+```
+
+=> https://go.dev/play/p/sPRdyDvXefK?__s=mk8u899owb9yurl256gw Go playground
+
+## 8. "I am a Teapot" HTTP response code
+
+Defined in 1998 as one of the IETF's traditional April Fools' jokes (RFC 2324), the Hyper Text Coffee Pot Control Protocol specifies an HTTP status code that is not intended for actual HTTP server implementation. According to the RFC, this code should be returned by teapots when asked to brew coffee. This status code also serves as an Easter egg on some websites, such as Google.com's "I'm a teapot" feature. Occasionally, it is used to respond to a blocked request, even though the more appropriate response would be the 403 Forbidden status code.
+
+=> https://en.wikipedia.org/wiki/List_of_HTTP_status_codes#418
+
+## 9. `jq` is a functional programming language
+
+Many know of `jq`, the handy small tool and swiss army knife for JSON parsing. 
+
+=> https://github.com/jqlang/jq
+
+What many don't know that `jq` is actually a full blown functional programming language `jqlang`, have a look at the language description: 
+
+=> https://github.com/jqlang/jq/wiki/jq-Language-Description
+
+As a matter of fact, the language is so powerful, that there exists an implementation of `jq` in `jq` itself:
+
+=> https://github.com/wader/jqjq
+
+Here some snipped from `jqjq`, to get a feel of `jqlang`:
+
+```
+def _token:
+	def _re($re; f):
+	  ( . as {$remain, $string_stack}
+	  | $remain
+	  | match($re; "m").string
+	  | f as $token
+	  | { result: ($token | del(.string_stack))
+	    , remain: $remain[length:]
+	    , string_stack:
+	        ( if $token.string_stack == null then $string_stack
+	          else $token.string_stack
+	          end
+	        )
+	    }
+	  );
+	if .remain == "" then empty
+	else
+	  ( . as {$string_stack}
+	  | _re("^\\s+"; {whitespace: .})
+	  // _re("^#[^\n]*"; {comment: .})
+	  // _re("^\\.[_a-zA-Z][_a-zA-Z0-9]*"; {index: .[1:]})
+	  // _re("^[_a-zA-Z][_a-zA-Z0-9]*"; {ident: .})
+	  // _re("^@[_a-zA-Z][_a-zA-Z0-9]*"; {at_ident: .})
+	  // _re("^\\$[_a-zA-Z][_a-zA-Z0-9]*"; {binding: .})
+	  # 1.23, .123, 123e2, 1.23e2, 123E2, 1.23e+2, 1.23E-2 or 123
+	  // _re("^(?:[0-9]*\\.[0-9]+|[0-9]+)(?:[eE][-\\+]?[0-9]+)?"; {number: .})
+	  // _re("^\"(?:[^\"\\\\]|\\\\.)*?\\\\\\(";
+	      ( .[1:-2]
+	      | _unescape
+	      | {string_start: ., string_stack: ($string_stack+["\\("])}
+	      )
+	    )
+	 .
+	 .
+	 .
+```
+
+## 10. Regular expression to verify email addresses
+
+This is a pretty old meme, but still worth posting here (as some may be unaware). The RFC822 Perl regex to validate email addresses is 😱:
+
+```
+(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]
+)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:
+\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(
+?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ 
+\t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\0
+31]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\
+](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+
+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:
+(?:\r\n)?[ \t])*))*|(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z
+|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)
+?[ \t])*)*\<(?:(?:\r\n)?[ \t])*(?:@(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\
+r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[
+ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)
+?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t]
+)*))*(?:,@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[
+ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*
+)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]
+)+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*)
+*:(?:(?:\r\n)?[ \t])*)?(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+
+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r
+\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:
+\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t
+]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031
+]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](
+?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?
+:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?
+:\r\n)?[ \t])*))*\>(?:(?:\r\n)?[ \t])*)|(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?
+:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?
+[ \t]))*"(?:(?:\r\n)?[ \t])*)*:(?:(?:\r\n)?[ \t])*(?:(?:(?:[^()<>@,;:\\".\[\] 
+\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|
+\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>
+@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"
+(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t]
+)*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
+".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?
+:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[
+\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*|(?:[^()<>@,;:\\".\[\] \000-
+\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(
+?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)*\<(?:(?:\r\n)?[ \t])*(?:@(?:[^()<>@,;
+:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([
+^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\"
+.\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\
+]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*(?:,@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\
+[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\
+r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] 
+\000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]
+|\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ \t])*)?(?:[^()<>@,;:\\".\[\] \0
+00-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\
+.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,
+;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?
+:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*))*@(?:(?:\r\n)?[ \t])*
+(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".
+\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t])*(?:[
+^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]
+]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:(?:\r\n)?[ \t])*)(?:,\s*(
+?:(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
+".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(
+?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[
+\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t
+])*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t
+])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?
+:\.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|
+\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*|(?:
+[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\
+]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)*\<(?:(?:\r\n)
+?[ \t])*(?:@(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["
+()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)
+?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>
+@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*(?:,@(?:(?:\r\n)?[
+ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,
+;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\.(?:(?:\r\n)?[ \t]
+)*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\
+".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*)*:(?:(?:\r\n)?[ \t])*)?
+(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".
+\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?:
+\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\[
+"()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])
+*))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])
++|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\
+.(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z
+|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:(
+?:\r\n)?[ \t])*))*)?;\s*)
+```
+
+=> https://pdw.ex-parrot.com/Mail-RFC822-Address.html
+
+I hope you had some fun. E-Mail your comments to `paul@nospam.buetow.org` :-)
+
+other related posts are:
+
+=> ../ Back to the main site