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
Fuzzy finder as a Go library
Search
ktr
May 18, 2019
Programming
3
5.6k
Fuzzy finder as a Go library
Go Conference 2019 Spring
ktr
May 18, 2019
Tweet
Share
More Decks by ktr
See All by ktr
Monorepo における Go テストの差分実行 / Running Differential Go Tests in a Monorepo
ktr_0731
0
39
Designing libraries in Go way
ktr_0731
6
1.5k
Go Modules and Proxy Walkthrough
ktr_0731
8
26k
ソフトウェアの複雑さに立ち向かう技術 / Tackling software complexity
ktr_0731
0
170
つよくてニューゲーム / NewGame++
ktr_0731
0
930
やはり俺の Go アプリケーション設計はまちがっている。 / My Go Application Design Is Wrong, As I Expected
ktr_0731
13
3.5k
GopherCon2018
ktr_0731
2
1.7k
Evans: more expressive gRPC client
ktr_0731
2
440
自作 CLI ツールのワークフローとそれを支える技術 / the workflow of my CLI tool and technologies which supports it
ktr_0731
0
1.7k
Other Decks in Programming
See All in Programming
Regular Expressions, REXML, Automata Learning
makenowjust
0
220
Amazon BedrockでサーバレスなAIお料理ボットを作成する!!
tosuri13
0
230
私のEbitengineの第一歩
qt_luigi
0
450
Scala におけるコンパイラエラーとの付き合い方
chencmd
2
430
What you can do with Ruby on WebAssembly
kateinoigakukun
0
170
API Platform for Laravel
dunglas
1
800
rails_girls_is_my_gate_to_join_the_ruby_commuinty
maimux2x
0
200
Swiftコードバトル必勝法
toshi0383
0
170
Modernisation Progressive d’Applications PHP
hhamon
0
120
宿泊予約サイトにおける検索と料金計算の両立
skaji
0
100
Ruby Parser progress report 2024
yui_knk
2
230
Android開発以外のAndroid開発経験の活かしどころ
konifar
2
1.1k
Featured
See All Featured
Why Our Code Smells
bkeepers
PRO
334
56k
Optimizing for Happiness
mojombo
375
69k
Thoughts on Productivity
jonyablonski
66
4.2k
Art, The Web, and Tiny UX
lynnandtonic
294
20k
Into the Great Unknown - MozCon
thekraken
29
1.4k
The Straight Up "How To Draw Better" Workshop
denniskardys
230
130k
5 minutes of I Can Smell Your CMS
philhawksworth
202
19k
Bootstrapping a Software Product
garrettdimon
PRO
304
110k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
36
1.7k
From Idea to $5000 a Month in 5 Months
shpigford
379
46k
Designing the Hi-DPI Web
ddemaree
278
34k
Building Better People: How to give real-time feedback that sticks.
wjessup
359
19k
Transcript
BU(P$POGFSFODF4QSJOH Fuzzy finder as a Go library
XIPBNJ w LUS Ωλϩʔɺ!LUS@ w ৽ଔ w (Pͱ$-*πʔϧ͕͖͢
None
'V[[ZpOEFSJTԿ
wೖྗʹର͠ɺ͍͋·͍ݕࡧ ʹΑͬͯΠϯλϥΫςΟϒʹ ಛఆͷߦΛબͰ͖Δ wίϚϯυϥΠϯGV[[ZpOEFS G[G G[Z FUD 'V[[ZpOEFS
$ cd `ghq root`/`ghq list | fzf` HIRԼͷϦϙδτϦʹҠಈ
$ git branch | egrep -v '^\*' | fzf |
xargs git checkout ΠϯλϥΫςΟϒʹνΣοΫΞτઌ ϒϥϯνΛબ
ίϚϯυϥΠϯGV[[ZpOEFSΛ ѻ͏ࡍʹൃੜ͢Δ
w ߦࢦͰ͋ΔͨΊɺؚΊΒΕΔใྔʹ੍ݶ͕͋Δ w πʔϧʹΈࠐΉࡍͷෳࡶ͞ ίϚϯυϥΠϯGV[[ZpOEFS Λѻ͏ࡍʹൃੜ͢Δ
w ߦࢦͰ͋ΔͨΊɺؚΊΒΕΔใྔʹ੍ݶ͕͋Δ w πʔϧʹΈࠐΉࡍͷෳࡶ͞ ίϚϯυϥΠϯGV[[ZpOEFS Λѻ͏ࡍʹൃੜ͢Δ
None
None
None
w શ͘ಉ͡༰Λද͍ࣔͯ͠Δߦ͕ෳ͋Δͱ͖ɺ ϓϩάϥϜతɺϢʔβతʹͦΕΒΛ۠ผͰ͖ͳ͍ w ใྔΛ૿͢͜ͱͰϢχʔΫʹͰ͖Δ͕ʜ w ͱʹ͔͘ݟͮΒ͍ w ิॿతͳใݕࡧରʹͳΓɺݕࡧਫ਼͕Լ͢Δ ߦࢦͷݶք
w ߦࢦͰ͋ΔͨΊɺؚΊΒΕΔใྔʹ੍ݶ͕͋Δ w πʔϧʹΈࠐΉࡍͷෳࡶ͞ ίϚϯυϥΠϯGV[[ZpOEFS Λѻ͏ࡍʹൃੜ͢Δ
w DEίϚϯυͷ֦ு w ύεͷཤྺΛΠϯλϥΫςΟϒʹબͯ͠Ҡಈ CCSFOIBODE
w J5VOFTΛίϚϯυϥΠϯ͔Βૢ࡞Ͱ͖Δ w J5VOFTͷۂΛΠϯλϥΫςΟϒʹબɺ࠶ੜ LUSJUVOFTDMJ
w ίϚϯυϥΠϯGV[[ZpOEFSͷΠϯετʔϧ w πʔϧʹೝࣝͤ͞ΔͨΊͷઃఆ w ڥมͳͲ πʔϧʹΈࠐΉࡍͷෳࡶ͞
'V[[ZpOEFSΛϥΠϒϥϦ ͱͯ͠ఏڙ͢Δ
w ߦࢦͰ͋ΔͨΊɺؚΊΒΕΔใྔʹ੍ݶ͕͋Δ ‣ ෦తʹঢ়ଶΛ࣋ͭ͜ͱ͕Ͱ͖ɺϓϩάϥϜଆͰॏෳߦ Λ۠ผͰ͖Δ w πʔϧʹΈࠐΉࡍͷෳࡶ͞ ‣ (PʹͷΈґଘ͢ΔͨΊɺͦͦπʔϧͷઃఆ͕ෆཁ 'V[[ZpOEFSBTBMJCSBSZ
LUSHPGV[[ZpOEFS
func Find( slice interface{}, itemFunc func(i int) string, opts ...Option,
) (idx int, err error) LUSHPGV[[ZpOEFS
EFNP
EFNP ίϚϯυϥΠϯGV[[ZpOEFS
func main() { var slice []string s := bufio.NewScanner(os.Stdin) for
s.Scan() { slice = append(slice, s.Text()) } idx, err := fuzzyfinder.Find(slice, func(i int) string { return slice[i] }) if err != nil { fmt.Fprintf(os.Stderr, "failed to find: %s\n", err) os.Exit(1) } fmt.Println(slice[idx]) }
$ (cd $GOPATH/src/github.com/golang/go; git ls-files) | ./cli
EFNP ಉҰ༰ͷߦͷදࣔ
w ϓϩάϥϜࣗॏෳߦͷผ͕Ͱ͖Δ͕ɺ ϢʔβવผͰ͖ͳ͍ w ิॿతͳใΛϓϨϏϡʔΠϯυͰදࣔ ಉҰ༰ͷߦͷදࣔ
func main() { idx, err := fuzzyfinder.FindMulti(songs, func(i int) string
{ return songs[i].Title }, fuzzyfinder.WithPreviewWindow(func(i, w, h int) string { if i == -1 { return "" } return fmt.Sprintf( "Title: %s\nArtist: %s\nAlbum: %s\n", songs[i].Title, songs[i].ArtistName, songs[i].AlbumName) })) if err != nil { fmt.Fprintf(os.Stderr, "failed to find: %s\n", err) os.Exit(1) } for _, i := range idx { fmt.Println(fmt.Sprintf( "%s / %s / %s", songs[i].Title, songs[i].ArtistName, songs[i].AlbumName)) } }
$ ./orange
HPGV[[ZpOEFSͷ࣮
w ೖྗͱީิߦͷϚονϯά w Ϛονͨ͠ߦͷείΞϦϯά 'V[[ZpOEFSΛߏ͢Δཁૉ
w ೖྗlHSQDzΛؚΉߦΛ୳͢ w ۪ʹೋॏϧʔϓճ͚ͩ͢ Ϛονϯά
w ظ͍ͯ͠ΔߦΛ༏ઌతʹදࣔ͢ΔͨΊʹඞཁ w ֤ߦΛιʔτ͢ΔͨΊͷείΞΛࢉग़͢Δ είΞϦϯά
w ϨʔϕϯγϡλΠϯڑ w /FFEMFNBO8VOTDI w 4NJUI8BUFSNBO ৭ʑͳείΞϦϯάΞϧΰϦζϜ
w ϨʔϕϯγϡλΠϯڑεϖϧνΣοΧʔ w /FFEMFNBO8VOTDIG[Z w 4NJUI8BUFSNBOG[G ৭ʑͳείΞϦϯάΞϧΰϦζϜ
w ϨʔϕϯγϡλΠϯڑ w /FFEMFNBO8VOTDI w 4NJUI8BUFSNBO ৭ʑͳείΞϦϯάΞϧΰϦζϜ
w άϩʔόϧ ΞϥΠϯϝϯτΞϧΰϦζϜͷҰͭ w ͋ΔͭͷจࣈྻΛྻͤ͞ΔͨΊʹ ඞཁͳίετΛಈతܭը๏ΛͬͯٻΊΔ /FFEMFNBO8VOTDIΞϧΰϦζϜ
/FFEMFNBO8VOTDIΞϧΰϦζϜ | A T A C ------------------------- | A| C|
w ҎԼͷ͍ͣΕ͔ͷૢ࡞ͷ͏ͪɺ࠷είΞ͕ߴ͍ͷΛબ w ۭന Ϊϟοϓ ΛࠨͷจࣈྻʹҰͭૠೖ w ۭന Ϊϟοϓ Λ্ͷจࣈྻʹҰͭૠೖ
w จࣈͱจࣈͷରԠ͚ ϚονPSϛεϚον /FFEMFNBO8VOTDIΞϧΰϦζϜ
w ҎԼͷ͍ͣΕ͔ͷૢ࡞ͷ͏ͪɺ࠷είΞ͕ߴ͍ͷΛબ w ۭന Ϊϟοϓ ΛࠨͷจࣈྻʹҰͭૠೖ w ۭന Ϊϟοϓ Λ্ͷจࣈྻʹҰͭૠೖ
w จࣈͱจࣈͷରԠ͚ ϚονPSϛεϚον PS /FFEMFNBO8VOTDIΞϧΰϦζϜ
/FFEMFNBO8VOTDIΞϧΰϦζϜ ยํ͕ۭจࣈͷͱ͖ͷ είΞ࠷ॳʹٻ·Δ | A T A C ------------------------- |
0 -2 -4 -6 -8 A| -2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ e.g. “ATAC” ʹରͯ͠ “” ΛΞϥ Πϯϝϯτ͢Δʹ 4 ͭ
ΪϟοϓΛૠೖ͢Εྑ͍ | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ “” ͱ “” ʹͦΕͧΕ จࣈΛରԠ͚Δ߹ɺ Ϛον͍ͯ͠ΔͷͰ +2 (0 +
2 = 2) | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ “A” ͱ “” ͕͋Γɺ ޙऀʹΪϟοϓΛૠೖ ͢ΔͷͰ -2 (-2 -
2 = -4) | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ “” ͱ “A” ͕͋Γɺ લऀʹΪϟοϓΛૠೖ ͢ΔͷͰ -2 (-2 -
2 = -4) | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ match = 2 left gap = -4 top gap
= -4 Ͳ͔͜ΒٻΊ͔ͨΛه | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ mismatch = -3 left gap = 0 top gap
= -6 | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 2 0 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ match = -2 left gap = -2 top gap
= -8 | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 2 0 -2 C| -4
/FFEMFNBO8VOTDIΞϧΰϦζϜ mismatch = -7 left gap = -4 top gap
= -10 | A T A C ------------------------- | 0 -2 -4 -6 -8 A| -2 2 0 -2 -4 C| -4
| A T A C ------------------------- | 0 -2 -4
-6 -8 A| -2 2 0 -2 -4 C| -4 0 1 -1 0 /FFEMFNBO8VOTDIΞϧΰϦζϜ ࠷ऴతͳঢ়ଶ
| A T A C ------------------------- | 0 -2 -4
-6 -8 A| -2 2 0 -2 -4 C| -4 0 1 -1 0 /FFEMFNBO8VOTDIΞϧΰϦζϜ ඌͷείΞ͕ ͜ͷจࣈྻؒͷείΞ είΞ = 0
| A T A C ------------------------- | 0 -2 -4
-6 -8 A| -2 2 0 -2 -4 C| -4 0 1 -1 0 /FFEMFNBO8VOTDIΞϧΰϦζϜ A T A C | | A - - C ඌ͔ΒҹͷॱʹḷΔ
w ϨʔϕϯγϡλΠϯڑ w /FFEMFNBO8VOTDI w 4NJUI8BUFSNBO ৭ʑͳείΞϦϯάΞϧΰϦζϜ
w ϩʔΧϧΞϥΠϯϝϯτΞϧΰϦζϜͷҰͭ w શମతʹࣅ͍ͯͳ͍ͭͷจࣈྻͷ ہॴతͳΞϥΠϯϝϯτΛٻΊΔΞϧΰϦζϜ w /FFEMFNBO8VTDIͱඇৗʹࣅ͍ͯΔ͕ɺ είΞ͕ϚΠφεʹͳΒͳ͍ 4NJUI8BUFSNBOΞϧΰϦζϜ
4NJUI8BUFSNBOΞϧΰϦζϜ w ҎԼͷ͍ͣΕ͔ͷૢ࡞ͷ͏ͪɺ࠷είΞ͕ߴ͍ͷΛબ w ۭന Ϊϟοϓ ΛࠨͷจࣈྻʹҰͭૠೖ w ۭന Ϊϟοϓ
Λ্ͷจࣈྻʹҰͭૠೖ w จࣈͱจࣈͷରԠ͚ ϚονPSϛεϚον w θϩ
| A T A C ------------------------- | 0 0 0
0 0 A| 0 2 0 2 0 C| 0 0 1 0 4 4NJUI8BUFSNBOΞϧΰϦζϜ ඌ͔Βઌ಄Ͱͳ͘ɺ ෦తͳΞϥΠϯϝϯτ (ඌ͔Β 0 ·Ͱ)
| A T A C ------------------------- | 0 0 0
0 0 A| 0 2 0 2 0 C| 0 0 1 0 4 4NJUI8BUFSNBOΞϧΰϦζϜ είΞ = 4
| A T A C ------------------------- | 0 0 0
0 0 A| 0 2 0 2 0 C| 0 0 1 0 4 4NJUI8BUFSNBOΞϧΰϦζϜ A T A C | | - - A C
w ΪϟοϓΛ࡞Δ͜ͱࣗମͷϖφϧςΟ w ઌ಄ҰகϘʔφε w FUD ϘʔφεͱϖφϧςΟ
w ઃܭͦΕͧΕͷ࣮ʹΑΔ w G[ZKIBXUIPSOG[Z"-(03*5).NE w G[GKVOFHVOOG[GTSDBMHPBMHPHP ϘʔφεͱϖφϧςΟ
·ͱΊ
ೖྗʹϚον͢ΔߦΛߜΓࠐΉ 4NJUI8BUFSNBOͰ֤ߦΛείΞϦϯά είΞ͕ߴ͍ͷ͔Βॱʹදࣔ HPGV[[ZpOEFSͷ࣮
w ॏෳߦͷ۠ผ w ϓϨϏϡʔΠϯυͰͷิॿతͳใͷ༩ w πʔϧ͔ΒGV[[ZpOEFSΛͭ͘Δࡍʹɺ ίϚϯυϥΠϯGV[[ZpOEFSͷґଘΛղফͰ ͖Δ HPGV[[ZpOEFSͷղܾ͢Δ͜ͱ
5IBOLTGPSMJTUFOJOH