rm -rf v2/

10 files changed, 0 insertions, 1843 deletions

diff --git a/v2/src/content/en/about.page b/v2/src/content/en/about.page
deleted file mode 100644
index aac3e67..0000000
--- a/v2/src/content/en/about.page
+++ /dev/null
@@ -1,7 +0,0 @@
----
-
-title: About
-
----
-
-It's all about me, baby!
diff --git a/v2/src/content/en/pastebin/guix-shebang.md b/v2/src/content/en/pastebin/guix-shebang.md
deleted file mode 100644
index 5be9ada..0000000
--- a/v2/src/content/en/pastebin/guix-shebang.md
+++ /dev/null
@@ -1,15 +0,0 @@
----
-
-title: Guix shebang
-
-date: 2020-02-14
-
----
-
-```shell
-#!/usr/bin/env -S guix environment --ad-hoc bash -- bash
-set -Eeuo pipefail
-cd "$(dirname "${BASH_SOURCE[0]}")"
-
-pwd
-```
diff --git a/v2/src/content/en/pastebin/raku-tuple-type-annotation.md b/v2/src/content/en/pastebin/raku-tuple-type-annotation.md
deleted file mode 100644
index 6c13b39..0000000
--- a/v2/src/content/en/pastebin/raku-tuple-type-annotation.md
+++ /dev/null
@@ -1,33 +0,0 @@
----
-
-title: Raku tuple type annotation
-
-date: 2019-12-29
-
-categories: raku programming-languages
-
----
-
-```perl
-# Single Str return value: this works
-sub f1(Str $in --> Str) {
-  $in;
-}
-
-# Tuple of Str as return value: this works
-sub f2(Str $in) {
-  ($in, $in);
-}
-
-# Tuple of Str as return value with type annotation: this doesn't works
-sub f2(Str $in --> (Str, Str)) {
-  ($in, $in);
-}
-```
-
-Error log is:
-
-```perl
-===SORRY!=== Error while compiling /path/to/my/file
-Malformed return value
-```
diff --git a/v2/src/content/en/pastebin/sicp-exercise-3-19.md b/v2/src/content/en/pastebin/sicp-exercise-3-19.md
deleted file mode 100644
index 32f7aa9..0000000
--- a/v2/src/content/en/pastebin/sicp-exercise-3-19.md
+++ /dev/null
@@ -1,109 +0,0 @@
----
-
-title: SICP exercise 3.19
-
-date: 2021-09-02
-
-categories: lisp programming-languages
-
----
-
-Some content here, before:
-
-```scheme
-(define (cycle? l)
-  (define (rec l x)
-    (cond
-      ((null? x) false)
-      ((eq? l x) true)
-      (true (rec l (cdr x)))))
-  (rec l (cdr l)))
-```
-
-Sample interactive session:
-
-```scheme
-scheme@(guile-user)> (define true #t)
-scheme@(guile-user)> (define false #f)
-scheme@(guile-user)>
-(define (cycle? l)
-  (define (rec l x)
-    (cond
-      ((null? x) false)
-      ((eq? l x) true)
-      (true (rec l (cdr x)))))
-  (rec l (cdr l)))
-scheme@(guile-user)> (cycle? '(1 2 3))
-$9 = #f
-scheme@(guile-user)> (cycle? (make-cycle '(1 2 3)))
-$10 = #t
-```
-
-# An h1
-
-a list:
-
-1. one
-2. two
-3. three
-
-some content.
-
-- item
-- another
-- yet another
-
-## An h2
-
-Xablau:
-
-```
-xupliu 1
-
-3
-4
-
-
-
-
-
-dez
-```
-
-Foi `wikiwiu`.
-
-a very long code block:
-
-```
-wef
-wef               wef            wef       wef
-wef                                                   wef       wef wef we fwef                wef wef wef            wef 
-```
-
-Someone said:
-
-> Xablau, xupliu.
-
-### A repeated header
-### A repeated header
-
-a big list:
-
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
-1. a
diff --git a/v2/src/content/en/remembering-ann.md b/v2/src/content/en/remembering-ann.md
deleted file mode 100644
index 9013ad4..0000000
--- a/v2/src/content/en/remembering-ann.md
+++ /dev/null
@@ -1,186 +0,0 @@
----
-
-title: ANN: remembering - Add memory to dmenu, fzf and similar tools
-
-date: 2021-01-26
-
-categories: ann
-
----
-
-Today I pushed v0.1.0 of [remembering][remembering], a tool to enhance the interactive usability of menu-like tools, such as [dmenu][dmenu] and [fzf][fzf].
-
-## Previous solution
-
-I previously used [yeganesh][yeganesh] fill this gap, but as I started to rely less on Emacs, I added fzf as my go-to tool for doing fuzzy searching on the terminal.
-But I didn't like that fzf always showed the same order of things, when I would only need 3 or 4 commonly used files.
-
-For those who don't know: yeganesh is a wrapper around dmenu that will remember your most used programs and put them on the beginning of the list of executables.
-This is very convenient for interactive prolonged use, as with time the things you usually want are right at the very beginning.
-
-But now I had this thing, yeganesh, that solved this problem for dmenu, but didn't for fzf.
-
-I initially considered patching yeganesh to support it, but I found it more coupled to dmenu than I would desire.
-I'd rather have something that knows nothing about dmenu, fzf or anything, but enhances tools like those in a useful way.
-
-[remembering]: https://euandreh.xyz/remembering/
-[dmenu]: https://tools.suckless.org/dmenu/
-[fzf]: https://github.com/junegunn/fzf
-[yeganesh]: http://dmwit.com/yeganesh/
-
-## Implementation
-
-Other than being decoupled from dmenu, another improvement I though that could be made on top of yeganesh is the programming language choice.
-Instead of Haskell, I went with POSIX sh.
-Sticking to POSIX sh makes it require less build-time dependencies. There aren't any, actually. Packaging is made much easier due to that.
-
-The good thing is that the program itself is small enough ([119 lines][119-lines] on v0.1.0) that POSIX sh does the job just fine, combined with other POSIX utilities such as [getopts][getopts], [sort][sort] and [awk][awk].
-
-[119-lines]: https://euandre.org/git/remembering/tree/remembering?id=v0.1.0
-[getopts]: http://www.opengroup.org/onlinepubs/9699919799/utilities/getopts.html
-[sort]: http://www.opengroup.org/onlinepubs/9699919799/utilities/sort.html
-[awk]: http://www.opengroup.org/onlinepubs/9699919799/utilities/awk.html
-
-The behaviour is: given a program that will read from STDIN and write a single entry to STDOUT, `remembering` wraps that program, and rearranges STDIN so that previous choices appear at the beginning.
-
-Where you would do:
-
-```shell
-$ seq 5 | fzf
-
-  5
-  4
-  3
-  2
-> 1
-  5/5
->
-```
-
-And every time get the same order of numbers, now you can write:
-
-```shell
-$ seq 5 | remembering -p seq-fzf -c fzf
-
-  5
-  4
-  3
-  2
-> 1
-  5/5
->
-```
-
-On the first run, everything is the same. If you picked 4 on the previous example, the following run would be different:
-
-```shell
-$ seq 5 | remembering -p seq-fzf -c fzf
-
-  5
-  3
-  2
-  1
-> 4
-  5/5
->
-```
-
-As time passes, the list would adjust based on the frequency of your choices.
-
-I aimed for reusability, so that I could wrap diverse commands with `remembering` and it would be able to work. To accomplish that, a "profile" (the `-p something` part) stores data about different runs separately.
-
-I took the idea of building something small with few dependencies to other places too:
-- the manpages are written in troff directly;
-- the tests are just more POSIX sh files;
-- and a POSIX Makefile to `check` and `install`.
-
-I was aware of the value of sticking to coding to standards, but I had past experience mostly with programming language standards, such as ECMAScript, Common Lisp, Scheme, or with IndexedDB or DOM APIs.
-It felt good to rediscover these nice POSIX tools, which makes me remember of a quote by [Henry Spencer][poor-unix]:
-
-> Those who do not understand Unix are condemned to reinvent it, poorly.
-
-[poor-unix]: https://en.wikipedia.org/wiki/Henry_Spencer#cite_note-3
-
-## Usage examples
-
-Here are some functions I wrote myself that you may find useful:
-
-### Run a command with fzf on `$PWD`
-
-```shellcheck
-f() {
-  profile="$f-shell-function(pwd | sed -e 's_/_-_g')"
-  file="$(git ls-files | \
-            remembering -p "$profile" \
-                        -c "fzf --select-1 --exit -0 --query \"$2\" --preview 'cat {}'")"
-  if [ -n "$file" ]; then
-    # shellcheck disable=2068
-    history -s f $@
-    history -s "$1" "$file"
-  "$1" "$file"
-fi
-}
-```
-
-This way I can run `f vi` or `f vi config` at the root of a repository, and the list of files will always appear on the most used order.
-Adding `pwd` to the profile allows it to not mix data for different repositories.
-
-### Copy password to clipboard
-
-```shell
-choice="$(find "$HOME/.password-store" -type f                  | \
-            grep -Ev '(.git|.gpg-id)'                           | \
-            sed -e "s|$HOME/.password-store/||" -e 's/\.gpg$//' | \
-            remembering -p password-store \
-                        -c 'dmenu -l 20 -i')"
-
-
-if [ -n "$choice" ]; then
-  pass show "$choice" -c
-fi
-```
-
-Adding the above to a file and binding it to a keyboard shortcut, I can access the contents of my [password store][password-store], with the entries ordered by usage.
-
-[password-store]: https://www.passwordstore.org/
-
-### Replacing yeganesh
-
-Where I previously had:
-
-```shell
-exe=$(yeganesh -x) && exec $exe
-```
-
-Now I have:
-
-```shell
-exe=$(dmenu_path | remembering -p dmenu-exec -c dmenu) && exec $exe
-```
-
-This way, the executables appear on order of usage.
-
-If you don't have `dmenu_path`, you can get just the underlying `stest` tool that looks at the executables available in your `$PATH`. Here's a juicy one-liner to do it:
-
-```shell
-$ wget -O- https://dl.suckless.org/tools/dmenu-5.0.tar.gz | \
-    tar Ozxf - dmenu-5.0/arg.h dmenu-5.0/stest.c          | \
-    sed 's|^#include "arg.h"$|// #include "arg.h"|'       | \
-    cc -xc - -o stest
-```
-
-With the `stest` utility you'll be able to list executables in your `$PATH` and pipe them to dmenu or something else yourself:
-```shell
-$ (IFS=:; ./stest -flx $PATH;) | sort -u | remembering -p another-dmenu-exec -c dmenu | sh
-```
-
-In fact, the code for `dmenu_path` is almost just like that.
-
-## Conclusion
-
-For my personal use, I've [packaged] `remembering` for GNU Guix and Nix. Packaging it to any other distribution should be trivial, or just downloading the tarball and running `[sudo] make install`.
-
-Patches welcome!
-
-[packaged]: https://euandre.org/git/package-repository/
-[nix-file]: https://euandre.org/git/dotfiles/tree/nixos/not-on-nixpkgs/remembering.nix?id=0831444f745cf908e940407c3e00a61f6152961f
diff --git a/v2/src/content/en/slide/local-first.ps b/v2/src/content/en/slide/local-first.ps
deleted file mode 100644
index 44c5858..0000000
--- a/v2/src/content/en/slide/local-first.ps
+++ /dev/null
@@ -1,522 +0,0 @@
-%!PS-Adobe-3.0 
-%%DocumentMedia: SLIDE 842 595 0 () () 
-%%EndComments 
-%%BeginDefaults 
-%%PageMedia: SLIDE
-%%EndDefaults 
-<< /PageSize [842 595] /ImagingBBox null >> setpagedevice 
-
-/reencode {
-	exch
-	findfont
-	dup length dict
-	begin
-	{       
-		1 index /FID ne
-		{ def }
-		{ pop pop }
-		ifelse
-	} forall
-	/Encoding ISOLatin1Encoding def
-	currentdict
-	end
-	definefont pop
-} def
-/Courier /Courier reencode
-/Helvetica /Helvetica reencode
-/Times /Times reencode
-/Times-Italic /Times-Italic reencode
-
-
-/headerheight 77 def
-
-/frontfontsz  60 def
-/authorfontsz 40    def
-/titlefontsz  40     def
-/mainfontsz   30      def
-/codefontsz   18      def
-/tinyfontsz   18      def
-
-/titlefont  /Helvetica     findfont titlefontsz  scalefont def
-/mainfont   /Courier      findfont mainfontsz   scalefont def
-/codefont   /Courier      findfont codefontsz   scalefont def
-/tinyfont   /Times      findfont tinyfontsz   scalefont def
-/frontfont  /Helvetica findfont frontfontsz  scalefont def
-/authorfont /Times-Italic    findfont authorfontsz scalefont def
-/authorfonttwo /Times findfont authorfontsz scalefont def
-
-
-/pagewidth  842 def
-/pageheight 595 def
-/leftmargin 30  def
-/topmargin  595 def
-
-/pad 10 def
-
-/titlefonth  titlefontsz  pad add def
-/mainfonth   mainfontsz   pad add def
-/codefonth   codefontsz   pad add def
-/tinyfonth   tinyfontsz   pad add def
-/frontfonth  frontfontsz  pad add def
-/authorfonth authorfontsz pad add def
-
-/headermargin
-	pageheight headerheight titlefonth sub 2 div titlefontsz add sub
-def
-/rightmargin pagewidth leftmargin sub def
-/tbtop topmargin def
-/ypos topmargin def
-
-/xcur { currentpoint pop      } def
-/ycur { currentpoint exch pop } def
-
-/wordbreak ( ) def
-/linewrap {
-	/proc exch def
-	/linelength exch def
-	/textstring exch def
-	/breakwidth wordbreak stringwidth pop def
-	/curwidth 0 def
-	/lastwordbreak 0 def
-	/startchar 0 def
-	/restoftext textstring def
-	{
-		restoftext wordbreak search
-		{
-			/nextword exch def pop
-			/restoftext exch def
-			/wordwidth nextword stringwidth pop def
-			curwidth wordwidth add linelength gt
-			{
-				textstring startchar
-				lastwordbreak startchar sub
-				getinterval proc
-				/startchar lastwordbreak def
-				/curwidth wordwidth breakwidth add def
-			}
-			{
-				/curwidth curwidth wordwidth add
-				breakwidth add def 
-			} ifelse
-			/lastwordbreak lastwordbreak
-			nextword length add 1 add def
-		}
-		{
-			pop exit
-		} ifelse
-	} loop
-	/lastchar textstring length def
-	textstring startchar lastchar startchar sub 
-	getinterval proc
-} def
-
-/line {
-	0 0 0 setrgbcolor
-	0.5 setlinewidth
-	leftmargin ypos moveto
-	rightmargin ypos lineto
-	stroke
-} def
-
-/center {
-	dup
-	/str exch def
-	/sw str stringwidth pop def
-	/xpos pagewidth sw sub 2 div xcur sub def
-	xpos 0 rmoveto
-} def
-
-/objcenter {
-	pagewidth exch sub 2 div 0 translate
-} def
-
-/s {
-	/tbtop topmargin def
-	/ypos topmargin def
-	1 1 1 setrgbcolor
-	0 setlinewidth
-	newpath
-	0 pageheight moveto
-	pagewidth pageheight lineto
-	pagewidth 0 lineto
-	0 0 lineto
-	closepath
-	fill
-	stroke
-} def
-
-/l {
-	/h exch def
-	/ypos ypos h sub def
-	leftmargin ypos moveto
-} def
-
-/title {
-	frontfonth l
-	frontfont setfont
-	0.5 0.5 0.9 setrgbcolor
-	{ pagewidth leftmargin 2 mul sub }
-	{ frontfonth l center show }
-	linewrap
-	frontfonth 2 div l
-	frontfonth l
-} def
-
-/author {
-	authorfont setfont
-	0 0 0 setrgbcolor
-	{ pagewidth leftmargin 2 mul sub }
-	{ authorfonth l center show }
-	linewrap
-} def
-
-/authortwo {
-	authorfonttwo setfont
-	0 0 0 setrgbcolor
-	{ pagewidth leftmargin 2 mul sub }
-	{ authorfonth l center show }
-	linewrap
-} def
-
-/header {
-	/ypos pageheight headerheight sub def
-	0 0 0 setrgbcolor
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-	fill
-	stroke
-	leftmargin headermargin moveto
-	titlefont setfont 
-	0.5 0.5 0.9 setrgbcolor
-	center show
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-
-/n {
-	mainfont setfont
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-	{ mainfonth l show }
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-/cn {
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-	{ pagewidth leftmargin 2 mul sub }
-	{ tinyfonth l show }
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-/is {
-	/level1 save def
-	/showpage {} def
-} def
-
-/ie {
-	level1 restore
-} def
-
-/bs {
-	/tbtop ypos def
-} def
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-/be {
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-( On "local-first") title
-(Beyond the CRDT silver bullet) authortwo
-showpage
-%%Page: 1 1
-s
-( Part 1) header
-( Exposition) title
-showpage
-%%Page: 2 2
-s
-( Target) header
-() n
-() n
-() n
-(- documents) n
-(- files) n
-(- personal data repositories) n
-() n
-() n
-(Not: banking services, e-commerce, social networking, ride-sharing, etc.) n
-showpage
-%%Page: 3 3
-s
-() n
-() n
-() n
-( 7 ideals for local-first software) title
-showpage
-%%Page: 4 4
-s
-() n
-() n
-() n
-( 1 - no spinners: your work at your fingertips) title
-showpage
-%%Page: 5 5
-s
-() n
-() n
-() n
-( 2 - your work is not trapped on one device) title
-showpage
-%%Page: 6 6
-s
-() n
-() n
-() n
-( 3 - the network is optional) title
-showpage
-%%Page: 7 7
-s
-() n
-() n
-() n
-( 4 - seamless collaboration with your colleagues) title
-showpage
-%%Page: 8 8
-s
-() n
-() n
-() n
-( 5 - the long now) title
-showpage
-%%Page: 9 9
-s
-() n
-() n
-() n
-( 6 - security and privacy by default ) title
-showpage
-%%Page: 10 10
-s
-() n
-() n
-() n
-( 7 - you retain ultimate ownership and control) title
-showpage
-%%Page: 11 11
-s
-( Towards a better future) header
-() n
-() n
-() n
-() n
-( CRDTs \(Conflict-free Replicated Data Types\) as a Foundational Technology) authortwo
-showpage
-%%Page: 12 12
-s
-( Use case) header
-() n
-bs
-(# in node A and node B) cn
-(s = "Hello, World") cn
-() cn
-(# in node A) cn
-(s = "Hello, Alice") cn
-() cn
-(# in node B) cn
-(s = "Hello, Bob") cn
-be
-(How to reconcile those?) n
-(- Hello, ABloibce) n
-(- Hello, AliceBob) n
-(- Hello, BobAlice) n
-(- Hello, Alice) n
-(...) n
-showpage
-%%Page: 13 13
-s
-( Existing CRDTs differ) title
-(- performance) n
-(- storage) n
-(- compression) n
-(- metadata overhead) n
-showpage
-%%Page: 14 14
-s
-() n
-() n
-() n
-( Hint towards the "automerge" CRDT) title
-showpage
-%%Page: 15 15
-s
-() n
-() n
-() n
-() n
-() n
-() n
-(show comparison table, page 9) author
-showpage
-%%Page: 16 16
-s
-( Part 2) header
-( Critique) title
-showpage
-%%Page: 17 17
-s
-( Software license) header
-() n
-() n
-() n
-("In our opinion, maintaining control and ownership of data does not mean that the software must necessarily be open source.") author
-showpage
-%%Page: 18 18
-s
-( Example 1 - intentional restriction) header
-() n
-bs
-(#!/bin/sh) cn
-(TODAY="$\(date +%s\)") cn
-(LICENSE_EXPIRATION="$\(date -d 2020-10-27 +%s\)") cn
-(if [ "$TODAY" -ge "$LICENSE_EXPIRATION" ]; then) cn
-(	echo 'License expired!') cn
-(	exit 1) cn
-(fi) cn
-(echo $\(\(2 + 2\)\)) cn
-be
-() n
-bs
-(# today) cn
-($ ./useful-adder.sh) cn
-(4) cn
-(# tomorrow) cn
-($ ./useful-adder.sh) cn
-(License expired!) cn
-be
-showpage
-%%Page: 19 19
-s
-( Example 2 - unintentional restriction) header
-() n
-bs
-(# today) cn
-($ useful-program) cn
-(# ... useful output ...) cn
-() cn
-(# tomorrow, with more data) cn
-($ useful-program) cn
-(ERROR: Panic!  Stack overflow!) cn
-be
-showpage
-%%Page: 20 20
-s
-() n
-() n
-( local-first *requires* free software ) title
-(Otherwise "The Long Now" \(ideal nº5\) is lost) n
-showpage
-%%Page: 21 21
-s
-( Denial of existing solutions) header
-() n
-() n
-("In principle it is possible to collaborate without a repository service, e.g. by sending patch files by email, but the majority of Git users rely on GitHub." ) author
-() n
-(Solution: either GitHub+CRDTs or git send-email ) n
-showpage
-%%Page: 22 22
-s
-( Plain-text formats) header
-() n
-("Git is highly optimized for code and similar line-based text file") author
-() n
-(It even pulls software to the plain text directtion, e.g.:) n
-(- delivery-templates) n
-(- common-core.protocols.config) n
-() n
-(Why not exploit that more?) n
-showpage
-%%Page: 23 23
-s
-( Ditching of web applications) header
-() n
-() n
-("The architecture of web apps remains fundamentally server-centric) author
-() n
-(Disagree.  Contrast PouchDB with Android Instant Apps) n
-showpage
-%%Page: 24 24
-s
-( Costs are underrated) header
-() n
-(- storage) n
-(- backups) n
-(- maintenance) n
-() n
-(Example: blog vs vlog) n
-showpage
-%%Page: 25 25
-s
-( Real-time collaboration a bit overrated) header
-() n
-(It is only possible on the presence of reliable, medium-quality network connection) n
-() n
-() n
-("X also works when inside an elevator, subway or plane!") author
-showpage
-%%Page: 26 26
-s
-( On CRDTs and developer experience) header
-() n
-("For an app developer, how does the use of a CRDT-based data layer compare to existing storage layers like a SQL database, a filesystem, or CoreData?  Is a distributed system harder to write software for?) author
-() n
-(YES.) authortwo
-() n
-(See "A Note on Distributed Computing") n
-showpage
-%%Page: 27 27
-s
-( Conclusion) header
-() n
-(Why this is a "paper I love": it took offline-first and ran with it.) n
-() n
-(But a pinch of CRDT won't make the world local-first. ) n
-() n
-(The tricky part is the end of the sentence: "in spite of the Cloud".) n
-showpage
-%%Page: 28 28
-s
-( References) header
-() n
-(1. "Local-First Software: You Own Your Data, in spite of the Cloud", by M. Kleppmann, A. Wiggins, P. Van Hardenberg and M. F. McGranaghan) n
-(2. The Morning Paper article) n
-(3. "A Note on Distributed Compiting", by J. Waldo, G. Wyant, A. Wollrath and S. Kendall) n
-(4. these slides: euandre.org/slide/) n
-(5. prose version of this presentation) n
-(6. view source) n
-
-showpage
-
-%%EOF
diff --git a/v2/src/content/en/slide/local-first.slides b/v2/src/content/en/slide/local-first.slides
deleted file mode 100644
index fd83115..0000000
--- a/v2/src/content/en/slide/local-first.slides
+++ /dev/null
@@ -1,204 +0,0 @@
-# On "local-first"
-
-@Beyond the CRDT silver bullet
-
----
-## Part 1
-# Exposition
-
----
-## Target
-...
-- documents
-- files
-- personal data repositories
-..
-Not: banking services, e-commerce, social networking, ride-sharing, etc.
-
----
-...
-# 7 ideals for local-first software
-
----
-...
-# 1 - no spinners: your work at your fingertips
-
----
-...
-# 2 - your work is not trapped on one device
-
----
-...
-# 3 - the network is optional
-
----
-...
-# 4 - seamless collaboration with your colleagues
-
----
-...
-# 5 - the long now
-
----
-...
-# 6 - security and privacy by default 
-
----
-...
-# 7 - you retain ultimate ownership and control
-
----
-## Towards a better future
-....
-@ CRDTs (Conflict-free Replicated Data Types) as a Foundational Technology
-
----
-## Use case
-.
-	# in node A and node B
-	s = "Hello, World"
-	
-	# in node A
-	s = "Hello, Alice"
-	
-	# in node B
-	s = "Hello, Bob"
-
-How to reconcile those?
-- Hello, ABloibce
-- Hello, AliceBob
-- Hello, BobAlice
-- Hello, Alice
-\...
-
----
-# Existing CRDTs differ
-- performance
-- storage
-- compression
-- metadata overhead
-
----
-...
-# Hint towards the "automerge" CRDT
-
----
-......
-@@show comparison table, page 9
-
----
-## Part 2
-# Critique
-
----
-## Software license
-...
-@@"In our opinion, maintaining control and ownership of data does not mean that the software must necessarily be open source."
-
----
-## Example 1 - intentional restriction
-.
-	#!/bin/sh
-	TODAY="$(date +%s)"
-	LICENSE_EXPIRATION="$(date -d 2020-10-27 +%s)"
-	if [ "$TODAY" -ge "$LICENSE_EXPIRATION" ]; then
-		echo 'License expired!'
-		exit 1
-	fi
-	echo $((2 + 2))
-.
-	# today
-	$ ./useful-adder.sh
-	4
-
-	# tomorrow
-	$ ./useful-adder.sh
-	License expired!
----
-## Example 2 - unintentional restriction
-.
-	# today
-	$ useful-program
-	# ... useful output ...
-	
-	# tomorrow, with more data
-	$ useful-program
-	ERROR: Panic!  Stack overflow!
-
----
-..
-# local-first *requires* free software 
-
-Otherwise "The Long Now" (ideal nº5) is lost
-
----
-## Denial of existing solutions
-..
-@@"In principle it is possible to collaborate without a repository service, e.g. by sending patch files by email, but the majority of Git users rely on GitHub." 
-.
-Solution: either GitHub+CRDTs or git send-email 
-
----
-## Plain-text formats
-.
-@@"Git is highly optimized for code and similar line-based text file"
-.
-It even pulls software to the plain text directtion, e.g.:
-- delivery-templates
-- common-core.protocols.config
-.
-Why not exploit that more?
-
----
-## Ditching of web applications
-..
-@@"The architecture of web apps remains fundamentally server-centric
-.
-% FIXME: links
-Disagree.  Contrast PouchDB with Android Instant Apps
-
----
-## Costs are underrated
-.
-- storage
-- backups
-- maintenance
-.
-Example: blog vs vlog
-
----
-## Real-time collaboration a bit overrated
-.
-It is only possible on the presence of reliable, medium-quality network connection
-..
-@@"X also works when inside an elevator, subway or plane!"
-
----
-## On CRDTs and developer experience
-.
-@@"For an app developer, how does the use of a CRDT-based data layer compare to existing storage layers like a SQL database, a filesystem, or CoreData?  Is a distributed system harder to write software for?
-.
-@YES.
-.
-% FIXME: link
-See "A Note on Distributed Computing"
-
----
-## Conclusion
-.
-Why this is a "paper I love": it took offline-first and ran with it.
-.
-But a pinch of CRDT won't make the world local-first. 
-.
-The tricky part is the end of the sentence: "in spite of the Cloud".
-
----
-## References
-.
-% FIXME: links
-1. "Local-First Software: You Own Your Data, in spite of the Cloud", by M. Kleppmann, A. Wiggins, P. Van Hardenberg and M. F. McGranaghan
-2. The Morning Paper article
-3. "A Note on Distributed Compiting", by J. Waldo, G. Wyant, A. Wollrath and S. Kendall
-4. these slides: euandre.org/slide/
-5. prose version of this presentation
-6. view source
diff --git a/v2/src/content/en/slide/rollouts.ps b/v2/src/content/en/slide/rollouts.ps
deleted file mode 100644
index 0a8b39f..0000000
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+++ /dev/null
@@ -1,500 +0,0 @@
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-(Different use cases for backend, frontend and mobile ) authortwo
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-() n
-() n
-() n
-( "Feature flags" tend to come up when talking about continuous deployment) title
-showpage
-%%Page: 3 3
-s
-() n
-() n
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-() n
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-() n
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-showpage
-%%Page: 4 4
-s
-( Types) header
-() n
-() n
-() n
-(1. rollout) n
-(2. feature flag) n
-(3. experiment) n
-(4. operational toggle) n
-showpage
-%%Page: 5 5
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-( Rollout) header
-( For *rolling out* a new version of software) title
-(Short-lived using percentages) n
-(- a new deployment of kubernetes) n
-(- new APK released to the Play Store) n
-showpage
-%%Page: 6 6
-s
-( Feature flag) header
-( For turning a feature *on* or *off* ) title
-(Medium-lived using allow list, A/B test, percentage, app version, etc.) n
-(- :new-chargeback-flow) n
-(- :new-debit-card-activation-screen) n
-showpage
-%%Page: 7 7
-s
-( Experiment) header
-( For analysing behaviour) title
-(Medium-lived using allow list and A/B test) n
-(- :debit-withdrawal-test) n
-showpage
-%%Page: 8 8
-s
-( Operational toggle) header
-( For disabling features in #crash-like situations) title
-(Long-lived using percentage) n
-(- :bank-barcode-payment) n
-(- :savings-bank-barcode-query-provider) n
-showpage
-%%Page: 9 9
-s
-() n
-() n
-(We know know about the types) authortwo
-( But they have different relevance for backend, frontend and mobile) title
-showpage
-%%Page: 10 10
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-( backend) header
-() n
-() n
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-(2. feature flag: ~common-rollout~ common-xp and datasets) n
-(3. experiment: common-xp) n
-(4. operational toggle: ~common-rollout~ common-xp ) n
-showpage
-%%Page: 11 11
-s
-( frontend) header
-() n
-() n
-(1. rollout: CDN and page refreshes) n
-(2. feature flag: percentages and maybe IPs \(no :customer/id on the website\)) n
-(3. experiment: via dynamic backend control) n
-(4. operational toggle: via dynamic backend control ) n
-showpage
-%%Page: 12 12
-s
-( backend) header
-() n
-() n
-(1. rollout: app stores) n
-(2. feature flag: via dynamic backend control) n
-(3. experiment: via dynamic backend control) n
-(4. operational toggle: via dynamic backend control ) n
-showpage
-%%Page: 13 13
-s
-() n
-() n
-(Key differentiator is) authortwo
-( how much *control* we have over the environment) title
-showpage
-%%Page: 14 14
-s
-( backend) header
-( full control) title
-showpage
-%%Page: 15 15
-s
-( frontend) header
-( partial control) title
-(We choose when to make a new version available ) n
-showpage
-%%Page: 16 16
-s
-( mobile) header
-( very limited control) title
-(- app stores can restrict updates \(worse for iOS\)) n
-(- customers still have to download new versions ) n
-showpage
-%%Page: 17 17
-s
-( Costs) title
-(- more complex code) n
-(- compatibility with old app versions) n
-(- nesting is exponential) n
-showpage
-%%Page: 18 18
-s
-( Benefits) title
-(- dynamicity) n
-showpage
-%%Page: 19 19
-s
-( weighting costs × benefits) header
-( The less control we have, the more we value dynamicity ) title
-showpage
-%%Page: 20 20
-s
-( weighting costs × benefits) header
-() n
-() n
-() n
-(- backend: sometimes worth the cost) n
-(- frontend: almost always worth the cost) n
-(- mobile: *always* worth the cost) n
-showpage
-%%Page: 21 21
-s
-() n
-() n
-() n
-( Best practices) title
-showpage
-%%Page: 22 22
-s
-( dynamic content > feature flag) title
-(Always true for mobile, almost always for frontend ) n
-showpage
-%%Page: 23 23
-s
-( Use :include-list for named groups ) title
-(Always true for backend, frontend and mobile ) n
-bs
-({:rules) cn
-( #{{:types   :include-list) cn
-(    :content {:filename "debit-team-members.txt"}}}}) cn
-be
-showpage
-%%Page: 24 24
-s
-( Always use :app-version) title
-(Only for mobile) n
-bs
-({:rules) cn
-( #{{:types   :app-version) cn
-(    :content {:min-version #{{:platform :android) cn
-(                              :code     1000000}) cn
-(                             {:platform :ios) cn
-(                              :code     2000000}}}}}}) cn
-be
-showpage
-%%Page: 25 25
-s
-( Extend ~common-rollout~ common-xp if required) title
-(That's how :include-list, :app-version, etc. were born) n
-showpage
-%%Page: 26 26
-s
-( Beware of many nested feature flags) title
-(True for backend, frontend and mobile) n
-showpage
-%%Page: 27 27
-s
-( Don't delete app-facing feature flags) title
-(True for mobile) n
-showpage
-%%Page: 28 28
-s
-() n
-() n
-() n
-( Include a feature flag on the whiteboarding phase) title
-showpage
-%%Page: 29 29
-s
-() n
-() n
-() n
-( Include deleting/retiring the feature flag at the end) title
-showpage
-%%Page: 30 30
-s
-( Avoid renaming a feature flag) title
-(Use :app-version with :min-version instead) n
-showpage
-%%Page: 31 31
-s
-() n
-() n
-() n
-( And most importantly...) title
-showpage
-%%Page: 32 32
-s
-( *Always* rely on a feature flag on the app) title
-(Never do a hotfix, avoid expedited releases at all costs) n
-showpage
-%%Page: 33 33
-s
-( References) header
-() n
-(1. "Feature Toggles \(aka Feature Flags\)", by Pete Hodgson) n
-(2. "Continuous integration vs. delivery vs. deployment", by Sten Pittet) n
-(3. Accelerate, by N. Forsgren, J. Humble and G. Kim) n
-(4. these slides: euandre.org/slide/) n
-(5. prose version of this presentation) n
-(6. view source) n
-
-showpage
-
-%%EOF
diff --git a/v2/src/content/en/slide/rollouts.slides b/v2/src/content/en/slide/rollouts.slides
deleted file mode 100644
index aed745e..0000000
--- a/v2/src/content/en/slide/rollouts.slides
+++ /dev/null
@@ -1,208 +0,0 @@
----
-# Rollout, feature flag, experiment, operational toggle
-
-@Different use cases for backend, frontend and mobile 
-
----
-...
-# "Feature flags" tend to come up when talking about continuous deployment
-
----
-....
-@CI: continuous integration
-.
-@CD: continuous delivery
-.
-@CD: continuous deployment
-
----
-## Types
-...
-1. rollout
-2. feature flag
-3. experiment
-4. operational toggle
-
-% {favicon.svg}
----
-## Rollout
-
-# For *rolling out* a new version of software
-
-Short-lived using percentages
-
-% FIXME: links
-- a new deployment of kubernetes
-- new APK released to the Play Store
-
----
-## Feature flag
-
-# For turning a feature *on* or *off* 
-
-Medium-lived using allow list, A/B test, percentage, app version, etc.
-
-- :new-chargeback-flow
-- :new-debit-card-activation-screen
-
----
-## Experiment
-
-# For analysing behaviour
-
-Medium-lived using allow list and A/B test
-
-- :debit-withdrawal-test
-
----
-## Operational toggle
-
-# For disabling features in #crash-like situations
-
-Long-lived using percentage
-
-- :bank-barcode-payment
-- :savings-bank-barcode-query-provider
-
----
-..
-@We know know about the types
-# But they have different relevance for backend, frontend and mobile
-
----
-## backend
-..
-1. rollout: k8s blue/green, canary and ~common-rollout~ common-xp
-2. feature flag: ~common-rollout~ common-xp and datasets
-3. experiment: common-xp
-4. operational toggle: ~common-rollout~ common-xp 
-
----
-## frontend
-..
-1. rollout: CDN and page refreshes
-2. feature flag: percentages and maybe IPs (no :customer/id on the website)
-3. experiment: via dynamic backend control
-4. operational toggle: via dynamic backend control 
-
----
-## backend
-..
-1. rollout: app stores
-2. feature flag: via dynamic backend control
-3. experiment: via dynamic backend control
-4. operational toggle: via dynamic backend control 
-
----
-..
-@Key differentiator is
-# how much *control* we have over the environment
-
----
-## backend
-# full control
-% FIXME: emoji
-% 🎉
-
----
-## frontend
-# partial control
-We choose when to make a new version available 
-
----
-## mobile
-# very limited control
-- app stores can restrict updates (worse for iOS)
-- customers still have to download new versions 
-
----
-# Costs
-- more complex code
-- compatibility with old app versions
-- nesting is exponential
-
----
-# Benefits
-- dynamicity
-
----
-## weighting costs × benefits
-# The less control we have, the more we value dynamicity 
-
----
-## weighting costs × benefits
-...
-- backend: sometimes worth the cost
-- frontend: almost always worth the cost
-- mobile: *always* worth the cost
-
----
-...
-# Best practices
-
----
-# dynamic content > feature flag
-Always true for mobile, almost always for frontend 
-
----
-# Use :include-list for named groups 
-Always true for backend, frontend and mobile 
-
-	{:rules
-	 #{{:types   :include-list
-	    :content {:filename "debit-team-members.txt"}}}}
-
----
-# Always use :app-version
-Only for mobile
-
-	{:rules
-	 #{{:types   :app-version
-	    :content {:min-version #{{:platform :android
-	                              :code     1000000}
-	                             {:platform :ios
-	                              :code     2000000}}}}}}
-
----
-# Extend ~common-rollout~ common-xp if required
-
-That's how :include-list, :app-version, etc. were born
-
----
-# Beware of many nested feature flags
-True for backend, frontend and mobile
-
----
-# Don't delete app-facing feature flags
-True for mobile
-
----
-...
-# Include a feature flag on the whiteboarding phase
-
----
-...
-# Include deleting/retiring the feature flag at the end
-
----
-# Avoid renaming a feature flag
-Use :app-version with :min-version instead
-
----
-...
-# And most importantly...
-
----
-# *Always* rely on a feature flag on the app
-Never do a hotfix, avoid expedited releases at all costs
-
----
-## References
-.
-% FIXME: links
-1. "Feature Toggles (aka Feature Flags)", by Pete Hodgson
-2. "Continuous integration vs. delivery vs. deployment", by Sten Pittet
-3. Accelerate, by N. Forsgren, J. Humble and G. Kim
-4. these slides: euandre.org/slide/
-5. prose version of this presentation
-6. view source
diff --git a/v2/src/content/en/til/lisp-three-way-conditional.md b/v2/src/content/en/til/lisp-three-way-conditional.md
deleted file mode 100644
index 20fbd09..0000000
--- a/v2/src/content/en/til/lisp-three-way-conditional.md
+++ /dev/null
@@ -1,59 +0,0 @@
----
-
-title: Three-way conditional for number signs on Lisp
-
-date: 2021-04-24 3
-
-update: 2021-08-14
-
-categories: lisp scheme   common-lisp
-
----
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-A useful macro from Paul Graham's [On Lisp][on-lisp] book:
-
-```lisp
-(defmacro nif (expr pos zero neg)
-  (let ((g (gensym)))
-    `(let ((,g ,expr))
-       (cond ((plusp ,g) ,pos)
-             ((zerop ,g) ,zero)
-             (t ,neg)))))
-```
-
-After I looked at this macro, I started seeing opportunities to using it in many places, and yet I didn't see anyone else using it.
-
-The latest example I can think of is section 1.3.3 of [Structure and Interpretation of Computer Programs][sicp], which I was reading recently:
-
-```scheme
-(define (search f neg-point pos-point)
-  (let ((midpoint (average neg-point pos-point)))
-    (if (close-enough? neg-point post-point)
-        midpoint
-        (let ((test-value (f midpoint)))
-          (cond ((positive? test-value)
-                 (search f neg-point midpoint))
-                ((negative? test-value)
-                 (search f midpoint pos-point))
-                (else midpoint))))))
-```
-
-Not that the book should introduce such macro this early, but I couldn't avoid feeling bothered by not using the `nif` macro, which could even remove the need for the intermediate `test-value` variable:
-
-```scheme
-(define (search f neg-point pos-point)
-  (let ((midpoint (average neg-point pos-point)))
-    (if (close-enough? neg-point post-point)
-        midpoint
-        (nif (f midpoint)
-             (search f neg-point midpoint)
-             (midpoint)
-             (search f midpoint pos-point)))))
-```
-
-It also avoids `cond`'s extra clunky parentheses for grouping, which is unnecessary but built-in.
-
-As a macro, I personally feel it tilts the balance towards expressivenes despite its extra cognitive load toll.
-
-[on-lisp]: http://www.paulgraham.com/onlisptext.html
-[sicp]: https://mitpress.mit.edu/sites/default/files/sicp/index.html