[B! list][functional] ishideoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

ishideo id:ishideo

listã¨functionalã«é–¢ã™ã‚‹ishideoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (3)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

Pythonã‚’ä½¿ã£ã¦é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° Part.2
2019å¹´9æœˆ16ã€17æ—¥ã€æ—¥æœ¬æœ€å¤§ã®Pythonã®ç¥å…¸ã§ã‚ã‚‹ã€ŒPyCon JP 2019ã€ãŒé–‹å‚¬ã•ã‚Œã¾ã—ãŸã€‚ã€ŒPython New Eraã€ã‚’ã‚ãƒ£ãƒƒãƒã‚³ãƒ”ãƒ¼ã«ã€æ—¥æœ¬ã ã‘ã§ãªãä¸–ç•Œå„åœ°ã‹ã‚‰Python ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãŸã¡ãŒä¸€å ‚ã«ä¼šã—ã€ã•ã¾ã–ã¾ãªçŸ¥è¦‹ã‚’å…±æœ‰ã—ã¾ã™ã€‚ãƒ—ãƒ¬ã‚¼ãƒ³ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³ã€ŒPythonã¦ã‚™å§‹ã‚ã¦ã¿ã‚ˆã†é–¢æ•°åž‹ãƒ•ã‚šãƒã‚¯ã‚™ãƒ©ãƒŸãƒ³ã‚¯ã‚™ã€ã«ç™»å£‡ã—ãŸã®ã¯ã€æ ªå¼ä¼šç¤¾SQUEEZEã®å¯ºå¶‹å“²æ°ã€‚è¬›æ¼”è³‡æ–™ã¯ã“ã¡ã‚‰ ä¸å¤‰ï¼æ°¸ç¶šãƒ‡ãƒ¼ã‚¿æ§‹é€ ã‚’æä¾›ã™ã‚‹ãƒ‘ãƒƒã‚±ãƒ¼ã‚¸ å¯ºå¶‹å“²æ°ï¼šç¶šã„ã¦ã€ä¸å¤‰ï¼æ°¸ç¶šãƒ‡ãƒ¼ã‚¿æ§‹é€ ã«ã¤ã„ã¦ã§ã™ã€‚ listã‚’æ“ä½œã™ã‚‹é–¢æ•°ã®å•é¡Œç‚¹ã«ã¤ã„ã¦ã€ä¾‹é¡Œã§è¦‹ã¦ã„ãã¾ã—ã‚‡ã†ã€‚add_mangoã¯æžœç‰©åã®æ–‡å—åˆ—ã®listã‚’ã¨ã£ã¦ã€mangoã‚’ãã®listã«è¶³ã—ã¦è¿”ã—ã¾ã™ã€‚change_from_apple_to_bananaã¯ã€åŒã˜ã‚ˆã†ã«listã‚’ã¨ã£ã¦appleã‚’æŽ¢ã—ã¦ã€bananaã«å…¥ã‚Œæ›¿ãˆã¦è¿”ã—ã¾ã™ã€‚ ãã®
ishideo 2020/03/05
python

functional

list

pyrsistent

dict

pampy

match

monad

maybe
ãƒªãƒ³ã‚¯
Pythonã§Cleanã‚„Haskellã®ãƒªã‚¹ãƒˆç›¸å½“ã‚’æº–å‚™
Cleanã‚„Haskellã¨ã„ã£ãŸç´”ç²‹é–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã¯ç”Ÿç”£æ€§ãŒé«˜ã„ã¨ã‚ã¡ã“ã¡ã«æ›¸ã„ã¦ã‚ã£ãŸã®ã§ã€ã„ã‚ã„ã‚ã¨å‹‰å¼·ã—ã¦ã„ã‚‹ã¨ã“ã‚ã ã€‚ å‹‰å¼·ã—ã¦ã„ã‚‹ã¨ã€Pythonãªã©ã®æœ€è¿‘ã®å‘½ä»¤åž‹(imperative)ã‚ã‚‹ã„ã¯æ‰‹ç¶šãåž‹(procedural)ã¨ã„ã‚ã‚Œã‚‹è¨€èªžã§ã‚‚ã‹ãªã‚Šä¼¼ãŸã‚ˆã†ãªè¨˜è¿°ãŒã§ããã†ãªæ°—ãŒã—ãŸ(ã•ã™ãŒã«Javaã‚„Cã¨ã‹ã ã¨ç„¡ç†ãã†ã ãŒ)ã€‚ãã“ã§ã€Pythonã‚’ä½¿ã£ã¦é–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®é†é†å‘³ã‚’ã©ã“ã¾ã§å‘³ã‚ãˆã‚‹ã‹ãƒãƒ£ãƒ¬ãƒ³ã‚¸ã—ã¦ã¿ã‚‹ã“ã¨ã«ã—ãŸã€‚ã‚ã¾ã‚Šé–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«é¦´æŸ“ã¿ã®ãªã„äººã«ã‚‚ç†è§£ã—ã‚„ã™ãèª¬æ˜Žã§ãã‚‹ã‚ˆã†ã«å¿ƒãŒã‘ã‚‹ã¤ã‚‚ã‚Šã (ã¨ã„ã†ã‹ç§ã‚‚ã‚ã¾ã‚Šé¦´æŸ“ã¿ãŒãªã„)ã€‚ ç´”ç²‹é–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã§ã¯ã€é…å»¶è©•ä¾¡ã‚’è¡Œãˆã‚‹ã“ã¨ãŒç‰¹å¾´ã¨ãªã£ã¦ã„ã‚‹ã€‚é…å»¶è©•ä¾¡ã¨ã¯ã€ã™ã”ãç°¡å˜ã«è¨€ã£ã¦ã—ã¾ã†ã¨ã€å¿…è¦ã«ãªã‚‹ã¾ã§å¼ã®è©•ä¾¡ã‚„æ–‡ã®å®Ÿè¡Œã‚’ã—ãªã„ã“ã¨ã ã€‚ãŸã¨ãˆã°ã€ç„¡é™ã«ç¶šãæ•°åˆ—(æ•°å€¤ã®ãƒªã‚¹ãƒˆ)ã‚’ç”Ÿæˆã™ã‚‹é–¢æ•°ã‚’
ishideo 2008/09/26
python

cons

lisp

haskell

functional

list
ãƒªãƒ³ã‚¯
é…å»¶è©•ä¾¡ã®ãƒªã‚¹ãƒˆã‚’ä½œã‚‹ - è¥¿å°¾æ³°å’Œã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼
ãƒ‡ãƒ¼ã‚¿æ§‹ç¯‰åã¯ãŸã ã®é–¢æ•°ã˜ã‚ƒãªã„ã®ã‹ï¼Ÿ Haskell ã®ãƒªã‚¹ãƒˆãŒåˆ†ã‹ã‚‰ãªã„ã€‚é…å»¶è©•ä¾¡ã‚‚åˆ†ã‹ã‚‰ãªã„ã€‚ - ITæˆ¦è¨˜ http://d.hatena.ne.jp/amachang/20080201/1201881246 ã„ã‚„ã€é–¢æ•°ãªã®ã¯åˆ¥ã«æ§‹ã‚ãªã„ã®ã ã‘ã©ã€ãƒªã‚¹ãƒˆã‚’è¿”ã™é–¢æ•°ã«ã—ã¦ã—ã¾ã£ã¦ã¯ã„ã‘ãªã„ã¨æ€ã†ã€‚ãã‚Œã˜ã‚ƒã€Œ(å‘¼ã¶å‰ã®)æœªè©•ä¾¡ã®çŠ¶æ…‹ã€ã¨ã€Œ(èªã‚“ã å¾Œã®)ãƒªã‚¹ãƒˆå…¨éƒ¨ãŒã§ãã‚ãŒã£ã¦ã„ã‚‹çŠ¶æ…‹ã€ã®2ã¤ã®çŠ¶æ…‹ã—ã‹å–ã‚Œãªã„ã€‚å®Ÿéš›ã«ã¯ã€Œé 1å€‹ã ã‘è©•ä¾¡æ¸ˆã¿ã€ã€Œé 2å€‹ã ã‘è©•ä¾¡æ¸ˆã¿ã€â€¦ã¨ç„¡æ•°ã®çŠ¶æ…‹ãŒã‚ã‚‹ã®ã§ã€ã“ã‚ŒãŒå…¨éƒ¨é–¢æ•°ã«åˆ†ã‹ã‚Œã¦ã„ã‚‹å¿…è¦ãŒã‚ã‚‹ã€‚ ã¨ã„ã†ã‚ã‘ã§ã¾ãšã€Œè©•ä¾¡å‰ã®çŠ¶æ…‹(Thunk)ã€ã¨ã€Œè©•ä¾¡å¾Œã®å€¤ã€ã‚’è¡¨ç¾ã™ã‚‹ã‚¯ãƒ©ã‚¹ã‚’ä½œã£ã¦ã¿ãŸã€‚Thunkã®forceã‚’å‘¼ã¶ã¨çµæžœãŒValueã«ãªã‚‹ã¾ã§è©•ä¾¡ã‚’ç¹°ã‚Šè¿”ã™ã€‚ >>> class Value(object): def __init__(self, valu
ishideo 2008/08/29
lazy

python

list

function

functional
ãƒªãƒ³ã‚¯
1

ãŠçŸ¥ã‚‰ã›

ã‚‚ã£ã¨èªã‚€

å…¬å¼Twitter

@hatebu
æœ€æ–°ã®äººæ°—ã‚¨ãƒ³ãƒˆãƒªãƒ¼ã®é…ä¿¡

ã‚ãƒ¼ãƒœãƒ¼ãƒ‰ã‚·ãƒ§ãƒ¼ãƒˆã‚«ãƒƒãƒˆä¸€è¦§

jæ¬¡ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

kå‰ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

lã‚ã¨ã§èªã‚€

eã‚³ãƒ¡ãƒ³ãƒˆä¸€è¦§ã‚’é–‹ã

oãƒšãƒ¼ã‚¸ã‚’é–‹ã

è¨å®šã‚’å¤‰æ›´ã—ã¾ã—ãŸx

ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

ã‚¿ã‚°

é–¢é€£ã‚¿ã‚°ã§çµžã‚Šè¾¼ã‚€ (12)

listã¨functionalã«é–¢ã™ã‚‹ishideoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (3)

ãŠçŸ¥ã‚‰ã›

ä»Šé€±ã®ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚ãƒ³ã‚°ï¼ˆ2024å¹´12æœˆç¬¬1é€±ï¼‰

æœˆé–“ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚ãƒ³ã‚°ï¼ˆ2024å¹´11æœˆï¼‰

ä»Šé€±ã®ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚ãƒ³ã‚°ï¼ˆ2024å¹´11æœˆç¬¬5é€±ï¼‰

å…¬å¼Twitter

ã‚ãƒ¼ãƒœãƒ¼ãƒ‰ã‚·ãƒ§ãƒ¼ãƒˆã‚«ãƒƒãƒˆä¸€è¦§

ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

å…¬å¼Twitter

ã¯ã¦ãªã®ã‚µãƒ¼ãƒ“ã‚¹

ã‚¿ã‚°

é–¢é€£ã‚¿ã‚°ã§çµžã‚Šè¾¼ã‚€ (12)

listã¨functionalã«é–¢ã™ã‚‹ishideoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (3)

Pythonã‚’ä½¿ã£ã¦é–¢æ•°åž‹ãƒ—ãƒ­ã‚°ãƒ©ãƒŸãƒ³ã‚° Part.2

Pythonã§Cleanã‚„Haskellã®ãƒªã‚¹ãƒˆç›¸å½“ã‚’æº–å‚™

é…å»¶è©•ä¾¡ã®ãƒªã‚¹ãƒˆã‚’ä½œã‚‹ - è¥¿å°¾æ³°å’Œã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼

ãŠçŸ¥ã‚‰ã›

ä»Šé€±ã®ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚­ãƒ³ã‚°ï¼ˆ2024å¹´12æœˆç¬¬1é€±ï¼‰

æœˆé–“ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚­ãƒ³ã‚°ï¼ˆ2024å¹´11æœˆï¼‰

ä»Šé€±ã®ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚­ãƒ³ã‚°ï¼ˆ2024å¹´11æœˆç¬¬5é€±ï¼‰

å…¬å¼Twitter

ã‚­ãƒ¼ãƒœãƒ¼ãƒ‰ã‚·ãƒ§ãƒ¼ãƒˆã‚«ãƒƒãƒˆä¸€è¦§

ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

å…¬å¼Twitter

ã¯ã¦ãªã®ã‚µãƒ¼ãƒ“ã‚¹

é–¢é€£ã‚¿ã‚°ã§çµžã‚Šè¾¼ã‚€ (12)

listã¨functionalã«é–¢ã™ã‚‹ishideoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (3)

Pythonã‚’ä½¿ã£ã¦é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° Part.2

Pythonã§Cleanã‚„Haskellã®ãƒªã‚¹ãƒˆç›¸å½“ã‚’æº–å‚™

é…å»¶è©•ä¾¡ã®ãƒªã‚¹ãƒˆã‚’ä½œã‚‹ - è¥¿å°¾æ³°å’Œã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼

ãŠçŸ¥ã‚‰ã›

ä»Šé€±ã®ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚ãƒ³ã‚°ï¼ˆ2024å¹´12æœˆç¬¬1é€±ï¼‰

æœˆé–“ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚ãƒ³ã‚°ï¼ˆ2024å¹´11æœˆï¼‰

ä»Šé€±ã®ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯æ•°ãƒ©ãƒ³ã‚ãƒ³ã‚°ï¼ˆ2024å¹´11æœˆç¬¬5é€±ï¼‰

å…¬å¼Twitter

ã‚ãƒ¼ãƒœãƒ¼ãƒ‰ã‚·ãƒ§ãƒ¼ãƒˆã‚«ãƒƒãƒˆä¸€è¦§

ã¯ã¦ãªãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

å…¬å¼Twitter

ã¯ã¦ãªã®ã‚µãƒ¼ãƒ“ã‚¹