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ishideo id:ishideo

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document.querySelectorAllã§mapã‚„filterã‚’ä½¿ã†æ–¹æ³• - Qiita
document.querySelectorAll(selectors) ã‚’ Array.prototype.slice.call() ([].slice.call()) ã®ä¸ã«å…¥ã‚Œã‚‹ã¨ã€é…åˆ—ã§ä½¿ãˆã‚‹ map ã‚„ filter ã¨ã„ã£ãŸãƒ¡ã‚½ãƒƒãƒ‰ãŒä½¿ãˆã‚‹ã‚ˆã†ã«ãªã‚‹ã‚ˆã†ã§ã™ã€‚ ã‚µãƒ³ãƒ—ãƒ« ä¾‹ã¨ã—ã¦ã€Qiitaã®äººæ°—ã®æŠ•ç¨¿Beta ã«ã‚ã‚‹è¨˜äº‹ã®ã‚¿ã‚¤ãƒˆãƒ«ã‚’ã‚³ãƒ³ãƒžåŒºåˆ‡ã‚Šã§ã‚¢ãƒ©ãƒ¼ãƒˆè¡¨ç¤ºã™ã‚‹ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ãƒ¬ãƒƒãƒˆã‚’ä½œã£ã¦ã¿ã¾ã—ãŸã€‚ ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ã‚’Qiitaã®äººæ°—ã®æŠ•ç¨¿Betaã‚’é–‹ã„ã¦ã„ã‚‹çŠ¶æ…‹ã§ãƒ–ãƒ©ã‚¦ã‚¶ä¸Šã®ã‚¢ãƒ‰ãƒ¬ã‚¹ãƒãƒ¼ã«è²¼ã‚Šä»˜ã‘(è²¼ã‚Šä»˜ã‘æ™‚ã«å…ˆé ã® javascript: ãŒæ¶ˆãˆã‚‹å ´åˆã¯ javascript: ã‚’è¿½è¨˜ã—ã¦ãã ã•ã„)ã—ã¦ã‹ã‚‰Enterã‚ãƒ¼ã‚’æŠ¼ã™ã¨å®Ÿè¡Œã§ãã¾ã™ã€‚ ES2015ã®è¨˜æ³•(ã‚¢ãƒãƒ¼é–¢æ•°ç‰)ã¯ç”¨ã„ã¦ã„ãªã„ã®ã§ã€Internet Explorer 11ã§ã‚‚å‹•ä½œã—ã¾ã™ã€‚ [].slice.cal
ishideo 2019/04/26
querySelectorAll

map

javascript

bookmarklet

array

filter

qiita
ãƒªãƒ³ã‚¯
querySelectorAllã—ã¦mapã—ãŸã„ã¨ã[...ã™ã‚‹ã¨çŸã„ - hitode909ã®æ—¥è¨˜
è¡¨ç¤ºä¸ã®HTMLã‹ã‚‰æƒ…å ±ã‚’é›‘ã«æŠœãå‡ºã—ã¦åˆ©ç”¨ã™ã‚‹ãŸã‚ï¼Œãƒ–ãƒ©ã‚¦ã‚¶ã®ãƒ‡ãƒ™ãƒãƒƒãƒ‘ãƒ„ãƒ¼ãƒ«ãªã©ã§querySelectorAllã—ã¦mapã—ãŸã„ï¼Žã—ã‹ã—ï¼ŒquerySelectorAllã¯NodeListã‚’è¿”ã™ã®ã§ï¼Œmapã™ã‚‹ã«ã¯Arrayã«å¤‰æ›ã™ã‚‹å¿…è¦ãŒã‚ã‚‹ï¼Ž NodeListã‚’Arrayã«å¤‰æ›ã™ã‚‹ã¨ãã«çŸãæ›¸ãæ–¹æ³•ãªã„ã§ã™ã‹ã£ã¦åŒåƒšã«èžã„ãŸã‚‰ã„ã‚ã„ã‚æ•™ãˆã¦ã‚‚ã‚‰ãˆãŸã®ã§ãƒ¡ãƒ¢ï¼Ž Array.prototype.slice.callã™ã‚‹ ã‚ªãƒ¼ã‚½ãƒ‰ãƒƒã‚¯ã‚¹ãªæ‰‹æ³•ï¼Žæ˜”ã‹ã‚‰ã“ã‚Œã‚’æ›¸ã„ã¦ã„ã¦ï¼Œé•·ãã¦å›°ã£ã¦ã„ãŸï¼Žæœ€è¿‘ã¯ã‚¢ãƒãƒ¼é–¢æ•°ã‚’ä½¿ãˆã‚‹ã®ã§ã¡ã‚‡ã£ã¨çŸããªã£ãŸã‘ã©é•·ã„ï¼Ž Array.prototype.slice.call(document.querySelectorAll('a')).map(a => a.href) [].slice.callã™ã‚‹ Array.prototypeã®ã‹ã‚ã‚Šã«[]ã§æ›¸ãï¼Žã¡ã‚‡ã£ã¨çŸã„
ishideo 2019/04/26
querySelectorAll

map

javascript

bookmarklet

array

filter
ãƒªãƒ³ã‚¯
Array#product ã‚’ä½¿ã£ã¦é…åˆ—ã®æ“ä½œã‚’æ¥½ã«ã™ã‚‹ - ãŸãã£ã¦ã¤ã¥ã‚‹
é…åˆ—ãŒæ¬¡ã®ã‚ˆã†ã«ä¸Žãˆã‚‰ã‚Œã¦ã„ã‚‹ã¨ãã«ï¼Œ a = %w(a b c d e f g h i j) b = %w(1 2 3 4 5 6 7 8 9 0) å„è¦ç´ ã®ç·å½“ã‚Šã§ã“ã®ã‚ˆã†ãªé…åˆ—ã‚’ä½œã‚ŠãŸã„å ´åˆï¼Œ ["a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8", "a9", "a0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", "b8", "b9", "b0", "c1", "c2", "c3", "c4", "c5", "c6", "c7", "c8", "c9", "c0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d8", "d9", "d0", "e1", "e2", "e3", "e4", "e5", "e6", "e7", "e8", "e9", "e0",
ishideo 2017/07/26
ruby

array

product

map
ãƒªãƒ³ã‚¯
Rubyã§ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®é…åˆ—ã‚’ç‰¹å®šã®å±žæ€§ã®é…åˆ—ã«å¤‰æ›ã™ã‚‹ - Qiita
ä¸»ã«Cï¼ƒã‚’ã‚„ã£ã¦ã„ã‚‹ç§ã¯C#ã¨Rubyã§è‹¥å¹²æ„Ÿè¦šãŒé•ã„ã¾ã—ãŸã€‚ çµè«–ã‹ã‚‰è¨€ã†ã¨mapã‚’ä½¿ã„ã¾ã™ã€‚ C#ã®æ„Ÿè¦šã ã¨selectã‚’ä½¿ã„ãã†ãªã®ã§ã™ãŒã€selectã ã¨ã†ã¾ãã„ãã¾ã›ã‚“ã€‚ map select class Person attr_accessor :name, :sex def initialize(name, sex) @name = name @sex = sex end end people = [Person.new("John", "M"), Person.new("Kid", "F")] p people # => [#<Person:0x007f8cf58aacd0 @name="John", @sex="M">, #<Person:0x007f8cf58aac58 @name="Kid", @sex="F">] p people.map { |person| pe
ishideo 2017/07/24
ruby

map

select

array

struct
ãƒªãƒ³ã‚¯
Rubyã§ã‚‚ãƒªã‚¹ãƒˆå†…åŒ…è¡¨è¨˜ã—ãŸã„ï¼Ÿ - hp12c
Pythonã‚„Haskellã‚„Erlangã«ã¯ãƒªã‚¹ãƒˆå†…åŒ…è¡¨è¨˜ã¨å‘¼ã°ã‚Œã‚‹ ãƒªã‚¹ãƒˆã®ä¸ã§æ–°ãŸãªãƒªã‚¹ãƒˆã‚’ç”Ÿæˆã™ã‚‹æ§‹æ–‡ãŒã‚ã‚‹ã‚ˆ ä¾‹ãˆã°Rubyã§ãƒªã‚¹ãƒˆã®è¦ç´ ã®å€¤ã‚’å€ã«ã—ãŸã„å ´åˆã¯ Array#mapã‚’ä½¿ã†ã‚ˆã l = [*1..10] l.map { |i| i*2 } # => [2, 4, 6, 8, 10, 12, 14, 16, 18, 20] ã“ã‚Œã‚’Erlangã®ãƒªã‚¹ãƒˆå†…åŒ…è¡¨è¨˜ã§ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«æ›¸ã‘ã‚‹ã‚“ã L = lists:seq(1,10). [X*2 || X <- L]. % => [2,4,6,8,10,12,14,16,18,20] ãƒªã‚¹ãƒˆLã‹ã‚‰Xã‚’é¸ã³å‡ºã—ãã‚Œã«2ã‚’æŽ›ã‘ãŸã‚‚ã®ã‚’è¿”ã™ ã¤ã¾ã‚Š || ã®å·¦è¾ºã«ã¯å‡ºåŠ›ã¨ãªã‚‹å¼ã‚’ å³è¾ºã«ã¯é™å®šåã‚’æ›¸ã X <- Lã¯Erlangã§ã¯Generatorã¨å‘¼ã¶ã‚‰ã—ã„ã‚ˆ æ¬¡ã«ãƒªã‚¹ãƒˆã‹ã‚‰å¶æ•°ã ã‘ã‚’é¸ã‚“ã§ ãã‚Œã‚‰ã‚’å€ã«ã—ãŸã„å ´åˆã‚’è€ƒãˆã‚‹ã‚ˆ Ru
ishideo 2016/05/26
ruby

array

map

list

select

compact

erlang

comprehension

haskell

rbridge
ãƒªãƒ³ã‚¯
JavaScriptã§ãƒ‡ã‚«ãƒ«ãƒˆç© - guccyonikki
JavaScriptã§ãƒªã‚¹ãƒˆå†…åŒ…è¡¨è¨˜ã®ã‚ˆã†ãªäº‹ã‚’ã‚„ã£ã¦ã¿ãŸã„ã€‚ ãã®ç‚ºã«ã¾ãšãƒ‡ã‚«ãƒ«ãƒˆç©ã‚’ã¨ã‚‹ç‚ºã®å‡¦ç†ã‚’ä½œæˆã—ã¦ã¿ã‚‹ã€‚ ãƒ‡ã‚«ãƒ«ãƒˆç©ã£ã¦ï¼Ÿ ãƒ‡ã‚«ãƒ«ãƒˆç©ã¨ã¯ç›´ç©ã¨ã‚‚å‘¼ã°ã‚Œè‹±èªžã§ã¯product Cartesian product ã¨ã„ã†ã‚ˆã†ã ã€‚ ä¾‹ãˆã°[1,2,3]ã¨ã„ã†é›†åˆã¨ [4,5,6] ã¨ã„ã†é›†åˆãŒã‚ã‚‹ã¨ã€ ã“ã‚Œã‚‰ã®ãƒ‡ã‚«ãƒ«ãƒˆç©ã¯ [1,4],[1,5],[1,6],[2,4],[2,5],[2,6],[3,4],[3,5],[3,6] ã¨ãªã‚‹ã€‚è¦ã™ã‚‹ã«å…¨ã¦ã®çµ„ã¿åˆã‚ã›ã¨ã„ã†äº‹ã€‚ ãƒ‘ãƒƒã¨è¦‹ãŸæ„Ÿã˜å˜ç´”ã«ï¼’æ¬¡å…ƒé…åˆ—ã«ã—ã¦ã€ãƒ«ãƒ¼ãƒ—ã‚’ãƒã‚¹ãƒˆã«ã™ã‚‹ã ã‘ã§è‰¯ã•ãã†ã ãŒã€ã›ã£ã‹ããªã®ã§é–¢æ•°æŒ‡å‘çš„ã«æ›¸ã„ã¦ã¿ãŸã„ã€‚ ã¾ãšï¼’æ¬¡å…ƒç›®ã®é…åˆ— [4,5,6] ã«ä½•ã‚‰ã‹ã®å‡¦ç†ã‚’é©ç”¨ã™ã‚‹äº‹ã§ã€ [4,5,6] -> [ [1,4],[1,5],[1,6] ] ã¨å¤‰åŒ–ã™ã‚‹å‡¦ç†ãŒå¿…è¦ã€‚ ä½•ã‚‰ã‹ã®å‡¦ç†ã¨ã¯å›ºå®šã•ã‚ŒãŸ1ã¨ãã‚Œãž
ishideo 2008/09/24
javascript

array

flatten

map
ãƒªãƒ³ã‚¯
Mastering Javascript Arrays
Filed: Sun, Mar 25 2007 under Programming|| Tags: reference arrays javascript stacks queues ajax Mastering Javascript Arrays Believe it or not, the very first version of Javascript shipped without Arrays. Subsequent versions made up for the oversight and modern Javascript Arrays are powerful structures indeed, even emulating many common data structures such as stacks and queues. This reference
ishideo 2008/08/22
javascript

array

prototype

filter

map

forEach

some

every

higer-order

lisp
ãƒªãƒ³ã‚¯
ã¯ã¦ãªãƒ–ãƒã‚° | ç„¡æ–™ãƒ–ãƒã‚°ã‚’ä½œæˆã—ã‚ˆã†
é¡”ã«è¦‹ãˆã‚‹ï¼Ÿæœ€è¿‘ã€Œé€æ°´å£ã€ãŒæ°—ã«ãªã‚‹ã¨ã„ã†è©± ã€Œé€æ°´å£ã€ãŒæ°—ã«ãªã‚‹ä»Šæ—¥ã“ã®é ƒ æœ€è¿‘è¡—ä¸ã§æ°—ã«ãªã‚‹å˜åœ¨ã€ãã‚ŒãŒã“ã®ã€Œé€æ°´å£ã€ã§ã™ã€‚åœ°ä¸Šã®ãƒ•ãƒã‚¢ãŒ7éšŽä»¥ä¸Šã‚ã‚‹ãƒ“ãƒ«ãªã©ã€ä¸€å®šã®æ¡ä»¶ã‚’æº€ãŸã—ãŸå»ºç¯‰ç‰©ã«ã¯è¨ç½®ãŒç¾©å‹™ä»˜ã‘ã‚‰ã‚Œã¦ã„ã‚‹ã‚‚ã®ã§ã€ç«äº‹ãŒç™ºç”Ÿã—ãŸãƒ•ãƒã‚¢ã«ãŸã ã¡ã«æ°´ã‚’é€ã‚‹ãŸã‚ã«ä½¿ã‚ã‚Œã‚‹ã‚‚ã®ã§ã™ã€‚ãƒãƒ³ãƒ—è»Šâ€¦
ishideo 2008/08/20
javascript

Array

forEach

map

filter

functional
ãƒªãƒ³ã‚¯
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