Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Papers we love: Elixir edition
Search
Andrea Leopardi
July 16, 2018
Programming
5
1k
Papers we love: Elixir edition
Andrea Leopardi
July 16, 2018
Tweet
Share
More Decks by Andrea Leopardi
See All by Andrea Leopardi
The World is a Network (and We Are Just Nodes)
whatyouhide
0
150
BEAM: The Perfect Fit for Networks
whatyouhide
1
140
Update from the Elixir team - 2022
whatyouhide
0
340
Testing Asynchronous OTP
whatyouhide
0
460
Elixir Sightseeing Tour
whatyouhide
0
350
Mint - Disrupting HTTP clients
whatyouhide
0
210
BEAM Architecture Handbook
whatyouhide
7
2.6k
The Evolution of a Language
whatyouhide
0
120
Elixir - functional, concurrent, distributed programming for the rest of us
whatyouhide
2
290
Other Decks in Programming
See All in Programming
Scala におけるコンパイラエラーとの付き合い方
chencmd
1
150
dotfiles について話したい #湘なんか
stefafafan
2
280
メモリ最適化を究める!iOSアプリ開発における5つの重要なポイント
yhirakawa333
0
370
ESLint Rule により事業, 技術ドメインに沿った制約と誓約を敷衍させるアプローチのすゝめ
shinyaigeek
1
2.7k
大公開!iOS開発の悩みトップ5 〜iOSDC Japan 2024〜
ryunakayama
0
180
Some more adventure of Happy Eyeballs
coe401_
2
150
どうしてこうなった?から理解するActive Recordの関連の裏側
willnet
5
510
複雑さに立ち向かうための ソフトウェア開発入門
shiz
2
580
Boost Your Performance and Developer Productivity with Jakarta EE 11
ivargrimstad
1
930
ドメイン駆動設計を実践するために必要なもの
bikisuke
3
290
『ドメイン駆動設計をはじめよう』中核の業務領域
masuda220
PRO
5
840
Method Swizzlingを行うライブラリにおけるマルチモジュール設計
yoshikma
0
100
Featured
See All Featured
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
325
21k
Web development in the modern age
philhawksworth
204
10k
Speed Design
sergeychernyshev
18
400
Into the Great Unknown - MozCon
thekraken
28
1.4k
The World Runs on Bad Software
bkeepers
PRO
64
11k
Making the Leap to Tech Lead
cromwellryan
128
8.8k
Atom: Resistance is Futile
akmur
261
25k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
26
1.9k
Facilitating Awesome Meetings
lara
49
5.9k
Build your cross-platform service in a week with App Engine
jlugia
228
18k
Fashionably flexible responsive web design (full day workshop)
malarkey
400
65k
A Tale of Four Properties
chriscoyier
155
22k
Transcript
PAPERS WE LOVE ELIXIR EDITION PAPERS WE LOVE ELIXIR EDITION
@whatyouhide
None
None
None
None
None
“You know Yelp? Yeah, but for weed”– me
None
None
“You know Uber Eats?”– me
None
weedmaps.com/careers
ELIXIR functional concurrent fault tolerant
The Elixir core team
we existing research
Formatting code Diffing data structures Property-based testing ⚙
FORMATTING CODE
Code formatter welcoming to newcomers consistency across teams/orgs/community no style
discussions
print code with line length limit
%{foo: [1, 2, 3], bar: "baz"}
%{foo: [1, 2, 3], bar: "baz"} 30
%{foo: [1, 2, 3], bar: "baz"} 25
%{ foo: [1, 2, 3], bar: "baz" } 25
%{ foo: [1, 2, 3], bar: "baz" } 13
%{ foo: [ 1, 2, 3 ], bar: "baz" }
13
The Design of a Pretty-printing Library John Hughes
Documents "text" concat(document1, document2) nest(document, columns)
"[" |> concat("1,") |> concat("2,") |> concat("3") |> concat("]") [1,
2, 3]
"[" |> line("1,") |> line("2,") |> line("3") |> nest(2) |>
line("]") [ 1, 2, 3 ]
A Prettier Printer Philip Wadler
group( "[" |> concat("1,") |> concat("2,") |> concat("3") |> nest(2)
|> concat("]") ) [ 1, 2, 3 ]
choose( doc, replace_concat_with_line_break(doc) ) DANGER: STRICT LANGUAGE AHEAD
Strictly Pretty Christian Lindig
Our documents color(doc, :blue) nest(doc, :cursor) ...
DIFFING DATA STRUCTURES
1) test two strings are different (Test) test.ex:6 Assertion with
== failed code: assert "hello world!" == "Hello, my world" left: "hello world!" right: "Hello, my world" stacktrace: test.ex:7: (test)
None
An O(ND) Difference Algorithm and Its Variations Eugene W. Myers
“Find the shortest edit script to turn a sequence A
into a sequence B.” = Find shortest path in a graph
O(ND) D is related to how "similar" the two sequences
are DNA strand mutation source code changes
iex> List.myers_difference([1, 4, 2, 3], [1, 2, 3, 4]) [eq:
[1], del: [4], eq: [2, 3], ins: [4]]
Now colorize
No modifications to the paper this time
String Matching with Metric Trees Using an Approximate Distance Ilaria
Bartolini, Paolo Ciaccia, Marco Patella
PROPERTY-BASED TESTING
Shape of input Properties of output + + Randomness =
Property-based testing
check all list <- list_of(term()) do sorted = sort(list) assert
is_list(sorted) assert length(list) == length(sorted) end
String.starts_with?(s1 <> s2, s1) String.ends_with?(s1 <> s2, s2) For any
strings s1 and s2:
Only Erlang tools (with different license)
QuickCheck: A Lightweight Tool for Random Testing of Haskell Programs
Koen Classen John Hughes
all the base ideas are there but it relies too
heavily on types
data Colour = Red | Blue | Green instance Arbitrary
Colour where arbitrary = oneof [return Red, return Blue, return Green]
(prop/for-all [v (gen/vector gen/int)] (= (sort v) (sort (sort v))))
Clojure's test.check
StreamData check all s1 <- string(), s2 <- string() do
assert String.starts_with?(s1 <> s2, s1) assert String.ends_with?(s1 <> s2, s2) end
Generators functions that take some random state and return a
lazy tree
Lazy tree a value plus a "recipe" for shrinking it
StreamData.integer() 3 0 2 0 1 0
StreamData.integer() 3 0 2 0 1 0
map(StreamData.integer(), fn x -> x * 2 end) 3 *
2 0 * 2 2 * 2 0 * 2 1 * 2 0 * 2
map(StreamData.integer(), fn x -> x * 2 end) 6 0
4 0 2 0
HONORABLE MENTIONS
How to make ad-hoc polymorphism less ad hoc Philip Wadler
Stephen Blott
Recursive functions of symbolic expressions and their computation by machine
John McCarthy
Advances in record linkage methodology as applied to the 1985
census of Tampa Florida Matthew A. Jaro
Iteratee: Teaching an Old Fold New Tricks John W. Lato
CONCLUSIONS
Existing research is AWESOME
Research tends to solve problems in a general/simple/flexible/elegant way
HDD Hughes-driven development
@whatyouhide