[B! é…åˆ—] iwwã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

iww id:iww

é…åˆ—ã«é–¢ã™ã‚‹iwwã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (156)

${{author_name}}$

{{{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}}

ã‚µã‚¤ã‚ºãŒ0ã®æ§‹é€ ä½“ã¯ä½œã‚Œãªã„ï¼Ÿ - Qiita
å‰æ›¸ã ã“ã®è¨˜äº‹ã¯ã€2023ã®Unityã‚¢ãƒ‰ã‚«ãƒ¬ã®12/23ã®è¨˜äº‹ã§ã™ã€‚ ä»Šå¹´ã¯ã€å®Œèµ°è³žã«æŒ‘æˆ¦ã—ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚Qiitaå›ã¬ã„æ¬²ã—ã„ï¼ ã¯ã˜ã‚ã« C#ã¯ã€Œãƒžãƒãƒ¼ã‚¸ãƒ‰ã€ã¨ã„ã†ã ã‘ã‚ã£ã¦ã€æ™®æ®µã¯ãƒ¡ãƒ¢ãƒªä¸Šã§ã®ãµã‚‹ã¾ã„ãªã©ã¯ã‚ã¾ã‚Šæ„è˜ã—ãªãã¦æ¸ˆã‚€ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ã—ã‹ã—ã€ã‚‚ã†ä¸€ã¤ã®é¡”ãŒã‚ã‚Šã€unsafeã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚„ã€Marshalã€Unsafeã‚¯ãƒ©ã‚¹ãªã©ã€ãƒãƒ¼ãƒ¬ãƒ™ãƒ«ã¾ã§ãƒ—ãƒã‚°ãƒ©ãƒžãŒåˆ¶å¾¡ã§ãã‚‹ä»•çµ„ã¿ã‚‚å‚™ã‚ã£ã¦ãŠã‚Šã¾ã™ã€‚ StructLayoutã§æ§‹é€ ä½“ã‚µã‚¤ã‚ºã‚’æŒ‡å®š æ§‹é€ ä½“ãŒãƒ¡ãƒ¢ãƒªä¸Šã§ã©ã®ã‚ˆã†ãªãƒ¬ã‚¤ã‚¢ã‚¦ãƒˆã‚’ã¨ã‚‹ã‹ã«ã¤ã„ã¦ã¯ã€æ™®æ®µã¯æ„è˜ã›ãšã¨ã‚‚ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã‚„ãƒ©ãƒ³ã‚¿ã‚¤ãƒ ï¼ˆJITï¼‰ãŒè‰¯ã—ãªã«ã—ã¦ãã‚Œã¾ã™ã€‚ã—ã‹ã—ã€[StructLayout]å±žæ€§ã‚’ä½¿ã†ã“ã¨ã§ã“ã‚Œã‚’æŒ‡å®šã™ã‚‹ã“ã¨ã‚‚ã§ãã¾ã™ã€‚ ä¾‹ãˆã°ã“ã®ã‚ˆã†ã«ã™ã‚‹ã¨ã€ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã¯byteãŒ1ã¤ã ã‘ã€è³žå‘³1byteã—ã‹ãªã„ã§ã™ãŒã€512byteã¨ã—ã¦ã‚ã¤ã‹ã†
iww 2024/10/07
ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«æ§‹é€ ä½“

C

gcc

é…åˆ—
ãƒªãƒ³ã‚¯
DCL38-C. ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«é…åˆ—ãƒ¡ãƒ³ãƒã«ã¯æ£ã—ã„æ§‹æ–‡ã‚’ä½¿ç”¨ã™ã‚‹
DCL38-C. ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«é…åˆ—ãƒ¡ãƒ³ãƒã«ã¯æ£ã—ã„æ§‹æ–‡ã‚’ä½¿ç”¨ã™ã‚‹ ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«é…åˆ—ãƒ¡ãƒ³ãƒ(flexible array member)ã¨ã¯ã€2 ã¤ä»¥ä¸Šã®åå‰ä»˜ããƒ¡ãƒ³ãƒã‚’ã‚‚ã¤æ§‹é€ ä½“ã®æœ€å¾Œã®ãƒ¡ãƒ³ãƒãŒä¸å®Œå…¨é…åˆ—åž‹ã€ã¤ã¾ã‚Šã€æ§‹é€ ä½“ã®ä¸ã§é…åˆ—ã®ã‚µã‚¤ã‚ºãŒæ˜Žç¢ºã«æŒ‡å®šã•ã‚Œã¦ã„ãªã„ã€ç‰¹æ®Šãªåž‹ã«ãªã£ã¦ã„ã‚‹é…åˆ—ã‚’æŒ‡ã™ã€‚struct hack ã¨å‘¼ã°ã‚Œã‚‹ã“ã®æ‰‹æ³•ã¯åºƒãä½¿ã‚ã‚Œã¦ãŠã‚Šã€ã•ã¾ã–ã¾ãªã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ãŒå¯¾å¿œã—ã¦ã„ã‚‹ã€‚ãã‚Œã‚†ãˆã€ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«é…åˆ—ãƒ¡ãƒ³ãƒã®å®£è¨€ã«ã¯ã•ã¾ã–ã¾ãªæ§‹æ–‡ãŒä½¿ç”¨ã•ã‚Œã¦ããŸã€‚C æ¨™æº–ã«é©åˆã—ãŸå®Ÿè£…ã§ã¯ã€C æ¨™æº–ã«ã‚ˆã£ã¦æœ‰åŠ¹ã§ã‚ã‚‹ã¨ä¿è¨¼ã•ã‚Œã¦ã„ã‚‹æ§‹æ–‡ã‚’ä½¿ç”¨ã™ã‚‹ã“ã¨ã€‚ ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«é…åˆ—ãƒ¡ãƒ³ãƒã¯ã€C æ¨™æº–ã®ã‚»ã‚¯ã‚·ãƒ§ãƒ³ 6.7.2.1 ãƒ‘ãƒ©ã‚°ãƒ©ãƒ• 18 ã«ãŠã„ã¦æ¬¡ã®ã‚ˆã†ã«å®šç¾©ã•ã‚Œã¦ã„ã‚‹[ISO/IEC 9899:2011]ã€‚ ç‰¹åˆ¥ãªå ´åˆã¨ã—ã¦ã€2 ã¤ä»¥ä¸Šã®åå‰ä»˜ããƒ¡ãƒ³ãƒã‚’ã‚‚ã¤æ§‹é€ ä½“ã®æœ€å¾Œã®ãƒ¡ãƒ³ãƒã¯ã€ä¸å®Œå…¨é…
iww 2024/10/07
ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«æ§‹é€ ä½“

C

gcc

é…åˆ—
ãƒªãƒ³ã‚¯
zero length array, flexible array - Shohei Yoshida's Diary
github.com ãŸã¾ãŸã¾ç›®ã«å…¥ã£ãŸã“ã®ã‚³ãƒ¼ãƒ‰ã‚’è¦‹ã¦ã„ã¦, zero length arrayã£ã¦æœ«å°¾ã®ãƒ¡ãƒ³ãƒä»¥å¤–ã§ã‚‚ä½¿ãˆãŸã‚“ã ã£ã¦æ€ã£ã¦æ°—ã«ãªã‚‹ã¨ã“ã‚ã‚’èª¿ã¹ã¦ã¿ãŸ. Flexible array en.wikipedia.org C99ã‹ã‚‰å…¥ã£ãŸæ©Ÿèƒ½. é…åˆ—ã®é•·ã•ã‚’å®£è¨€ã—ãªã„ã“ã¨ã§åˆ©ç”¨ã§ãã‚‹. sizeofã¯ã§ããªã„. æ§‹é€ ä½“ãªã©ã®æœ«å°¾ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã«ç½®ãã“ã¨ãŒã§ãã‚‹. å…¸åž‹çš„ãªä½¿ã„æ–¹ã¯ä»¥ä¸‹ã®ã‚ˆã†ãªæ„Ÿã˜. struct Data { // some fields SomeData s[]; }; struct Data *d = malloc(sizeof(Data) + some_arbitrary_size); ãƒã‚¤ãƒ³ã‚¿ã‚’ä½¿ã£ã¦ã—ã¾ã†ã¨æ§‹é€ ä½“ã¨ã“ã®æœ«å°¾ã®ãƒ‡ãƒ¼ã‚¿ãŒã‚ã‚‹å ´æ‰€ã¯åˆ¥ã®é ˜åŸŸã«ãªã£ã¦ã—ã¾ã†ã‚ã‘ã ãŒ, ã“ã®ã‚ˆã†ã«ã™ã‚‹ã“ã¨ã§é€£ç¶šã™ã‚‹ãƒ¡ãƒ¢ãƒªã«ã™ã¹ã¦å‰²ã‚Šå½“ã¦ã‚‹ã“ã¨ãŒã§ãã‚‹. æ§‹é€ ä½“ã®æœ«å°¾
iww 2024/10/07
ãƒ•ãƒ¬ã‚ã‚·ãƒ–ãƒ«æ§‹é€ ä½“

C

gcc

é…åˆ—
ãƒªãƒ³ã‚¯
PHP: æ–°æ©Ÿèƒ½ - Manual
ã‚¹ã‚«ãƒ©ãƒ¼åž‹å®£è¨€ ã‚¹ã‚«ãƒ©ãƒ¼ åž‹å®£è¨€ ã«ã¯äºŒã¤ã®æ–¹å¼ãŒã‚ã‚Šã¾ã™ã€‚ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã®è‡ªå‹•å¤‰æ›(coercive) ãƒ¢ãƒ¼ãƒ‰ã¨ã€ åŽ³å¯†ã«åˆ¤æ–ã™ã‚‹ strict ãƒ¢ãƒ¼ãƒ‰ã§ã™ã€‚ ãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿ã¨ã—ã¦ã€ æ–‡å—åˆ— (string)ã€æ•´æ•° (int)ã€æµ®å‹•å°æ•°ç‚¹æ•° (float)ã€boolean (bool) ã¨ã„ã£ãŸåž‹ã‚’ã„ãšã‚Œã‹ã®æ–¹å¼ã§å¼·åˆ¶ã§ãã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ ã“ã‚Œã‚‰ã¯ã€PHP 5 ã§å°Žå…¥ã•ã‚ŒãŸåž‹å®£è¨€ (ã‚¯ãƒ©ã‚¹åã‚„ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ã‚¤ã‚¹ã€é…åˆ—ãã—ã¦ callable) ã‚’å¼·åŒ–ã™ã‚‹ã‚‚ã®ã§ã™ã€‚ <?php // ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã®ãƒ¢ãƒ¼ãƒ‰ function sumOfInts(int ...$ints) { return array_sum($ints); } var_dump(sumOfInts(2, '3', 4.1));
iww 2024/08/17
Nullåˆä½“æ¼”ç®—å ã¯ nullã«ã®ã¿å¯¾å¿œã—ã¦ã„ã‚‹ã®ã§ 0ã¨ã‹falseã¨ã‹ã¯å€¤

php

é…åˆ—
ãƒªãƒ³ã‚¯
jQuery.map() | jQuery API Documentation
iww 2024/01/30
JavaScript

jQuery

é…åˆ—

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹

ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«
ãƒªãƒ³ã‚¯
ã€jQueryã€‘è¤‡æ•°ã®è¦ç´ ãƒ»é…åˆ—ã«å¯¾ã—ã¦å‡¦ç†ã‚’ã™ã‚‹mapã®ä½¿ã„æ–¹ - TASK NOTES
ä»¥å‰ jQuery ã®ç¹°ã‚Šè¿”ã—å‡¦ç†ã«ã¤ã„ã¦æ›¸ãã¾ã—ãŸãŒï¼ˆã€jQueryã€‘è¤‡æ•°ã®è¦ç´ ã«å¯¾ã—ã¦ç¹°ã‚Šè¿”ã—å‡¦ç†ã‚’ã™ã‚‹ï¼ˆeachãƒ»forï¼‰ - TASK NOTESï¼‰ã€ã‚‚ã†ã²ã¨ã¤ map ã¨ã„ã†ãƒ¡ã‚½ãƒƒãƒ‰ãŒã‚ã‚Šã¾ã™ã€‚ã“ã‚Œã¯å˜ç´”ãªç¹°ã‚Šè¿”ã—å‡¦ç†ç”¨ã§ã¯ãªã„ã®ã§å‰å›žã®ã‚¨ãƒ³ãƒˆãƒªã‹ã‚‰ã¯å¤–ã—ã¾ã—ãŸãŒã€ä½¿ã„æ…£ã‚Œã‚‹ã¨éžå¸¸ã«ä¾¿åˆ©ãªã®ã§ã¾ã¨ã‚ã¦ãŠããŸã„ã¨æ€ã„ã¾ã™ã€‚ ä»Šå›žä½¿ã†ã‚µãƒ³ãƒ—ãƒ«ã®HTMLã¯ã“ã‚“ãªæ„Ÿã˜ã§ã™ã€‚ <div class="hoge">ã»ã’1</div> <div class="hoge">ã»ã’2</div> <div class="hoge">ã»ã’3</div> ... jQueryã®mapã¨ã¯ map ã¨ã¯ãƒžãƒƒãƒã—ãŸè¦ç´ æ•°åˆ†ã‚’ç¹°ã‚Šè¿”ã—ã¦æŒ‡å®šã—ãŸé–¢æ•°ã‚’å®Ÿè¡Œã—ã€ãã®çµæžœã‚’ã¾ã¨ã‚ãŸæ–°ã—ã„jQueryã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’è¿”ã—ã¦ãã‚Œã¾ã™ã€‚ç°¡å˜ã«è¨€ã†ã¨é…åˆ—ã‹ã‚‰åˆ¥ã®é…åˆ—ã‚’ä½œã‚‹ã¨ã„ã†äº‹ã§ã™ã€‚ .map( )ãƒ¡ã‚½ãƒƒãƒ‰ var arr
iww 2024/01/30
jQuery

é…åˆ—

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
Array.prototype.forEach() - JavaScript | MDN
æ¨™æº–çµ„ã¿è¾¼ã¿ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆArrayã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ãƒ¼Array() ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ãƒ¼é™çš„ãƒ¡ã‚½ãƒƒãƒ‰Array.from()Array.fromAsync()Array.isArray()Array.of()é™çš„ãƒ—ãƒãƒ‘ãƒ†ã‚£Array[Symbol.species]ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ãƒ¡ã‚½ãƒƒãƒ‰Array.prototype.at()Array.prototype.concat()Array.prototype.copyWithin()Array.prototype.entries()Array.prototype.every()Array.prototype.fill()Array.prototype.filter()Array.prototype.find()Array.prototype.findIndex()Array.prototype.findLast()Array.prototype.find
iww 2024/01/29
ã€Žä¾‹å¤–ã‚’ç™ºç”Ÿã™ã‚‹ä»¥å¤–ã®æ–¹æ³•ã§ã€ forEach() ãƒ«ãƒ¼ãƒ—ã‚’æ¢ã‚ãŸã‚Šè„±å‡ºã—ãŸã‚Šã™ã‚‹æ–¹æ³•ã¯ã‚ã‚Šã¾ã›ã‚“ã€‚ãã®ã‚ˆã†ãªå‹•ä½œã‚’è¡Œã†å ´åˆã€ forEach() ãƒ¡ã‚½ãƒƒãƒ‰ã¯é©åˆ‡ãªæ–¹æ³•ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã€ é…åˆ—ã‚’èµ°æŸ»ã—ã¦è¦‹ã¤ã‘ãŸã‚‰è¿”ã‚‹ã€ã¨ã‹ã«ã¯ä¸å‘ã

é…åˆ—

JavaScript
ãƒªãƒ³ã‚¯
libgit2ã®å†…éƒ¨ãƒ‡ãƒ¼ã‚¿æ§‹é€ : strmap - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
iww 2023/10/17
C

ãƒ©ã‚¤ãƒ–ãƒ©ãƒª

ãƒ—ãƒã‚°ãƒ©ãƒ

é…åˆ—
ãƒªãƒ³ã‚¯
ã€PHPã€‘é…åˆ—ã®ä»£å…¥ã¯ã‚¯ãƒãƒ¼ãƒ³ã‚³ãƒ”ãƒ¼ã«ãªã‚‹
iww 2023/02/27
php

é…åˆ—

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
PHPã§é…åˆ—ã§packã‚’è¡Œã†æ–¹æ³•ã€€å¼•æ•°ã®ã‚¢ãƒ³ãƒ‘ãƒƒã‚ãƒ³ã‚°
PHPã§ã¯é…åˆ—ã‚’å—ã‘å–ã‚‰ãšã€ä¸èº«ã‚’å±•é–‹ã—ãŸçŠ¶æ…‹ã—ã‹å—ã‘å–ã‚‰ãªã„é–¢æ•°ãŒå˜åœ¨ã—ã¾ã™ã€‚packé–¢æ•°ã¯ãƒã‚¤ãƒŠãƒªã‚’å¼„ã‚‹ã¨ãã«ä½¿ç”¨ã™ã‚‹é–¢æ•°ã§ã™ãŒã€ä¾‹ãˆã°1ãƒã‚¤ãƒˆã®å€¤ãŒ1024å€‹å…¥ã£ãŸé…åˆ—ã‚’ãƒã‚¤ãƒŠãƒªã«ã—ãŸã„ã¨ãã€ pack("C*", $array); ã¨æ›¸ã„ã¦ã‚‚æ£ã—ãå‹•ä½œã—ã¾ã›ã‚“ã€‚ æ£ã—ãã¯ pack("C*", ...$array); ã“ã®ã‚ˆã†ã«æ›¸ãã€å¼•æ•°ã®é…åˆ—ã‚’ã‚¢ãƒ³ãƒ‘ãƒƒã‚ãƒ³ã‚°ã—ã¾ã™ã€‚ ã“ã®æ›¸ãæ–¹ã‚’è¡Œã†ã¨ã€ $array=[0,1,2,3,ç¶šã]; ã®ã¨ã pack("C*", 0, 1, 2, 3, ç¶šã); ã‚’å®Ÿè¡Œã—ãŸã¨ãã¨åŒã˜æŒ™å‹•ã¨ãªã‚Šã¾ã™ã€‚ ã“ã®ã‚ˆã†ã«é…åˆ—ã‚’å±•é–‹ã—ãŸã„ã¨ã„ã†å ´åˆã¯æ„å¤–ã¨å¤šã„ã®ã§ã€ãœã²è¦šãˆã¦ãŠãã¾ã—ã‚‡ã†ã€‚ ã”è¦§ã„ãŸã ãã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã—ãŸã€‚
iww 2023/02/27
php

ç½

é…åˆ—
ãƒªãƒ³ã‚¯
ã‚ªãƒ•ã‚£ã‚¹æ©Ÿå™¨ã¨ã—ã¦ã®QWERTYé…åˆ—
iww 2023/01/24
ã€Žå™‚ã¨ã—ã¦ã¯é¢ç™½ã„ãŒã€å…¨ãã®ã‚¬ã‚»ãƒã‚¿ã ã€‚1872 å¹´æ™‚ç‚¹ã® ã‚ãƒ¼é…åˆ— (å›³ 5) ã¯ã€Œqwertyuiopã€ã§ã¯ãªã„ã€

ã‚ãƒ¼ãƒœãƒ¼ãƒ‰

é…åˆ—

æ´å²

å˜˜

PDF
ãƒªãƒ³ã‚¯
ä¸å¤®å€¤ã®ä¸å¤®å€¤ - Wikipedia
ä¸å¤®å€¤ã®ä¸å¤®å€¤ï¼ˆã¡ã‚…ã†ãŠã†ã¡ã®ã¡ã‚…ã†ãŠã†ã¡ã€è‹±: median of mediansï¼‰ã¨ã¯ã€ã‚¯ã‚¤ãƒƒã‚¯ã‚»ãƒ¬ã‚¯ãƒˆã«åŸºã¥ãé¸æŠžã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã®ã“ã¨ã§ã‚ã‚‹ã€‚kç•ªç›®ã«å¤§ãã„è¦ç´ ã‚’é¸æŠžã™ã‚‹ãŸã‚ã®æœ€æ‚ªè¨ˆç®—æ™‚é–“ãŒç·šå½¢ã«ãªã‚‹ã“ã¨ãŒç‰¹å¾´ã§ã‚ã‚‹ã€‚ ã“ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã§ã¯ã€æœ€åˆã«ãŠãŠã‚ˆãã®ä¸å¤®å€¤ã‚’ç·šå½¢æ™‚é–“ã§æŽ¢ç´¢ã—ã€ãã®å€¤ã‚’ã‚¯ã‚¤ãƒƒã‚¯ã‚»ãƒ¬ã‚¯ãƒˆã§ã®ãƒ”ãƒœãƒƒãƒˆå€¤ã¨ã™ã‚‹ã€‚ã¤ã¾ã‚Šã€ï¼ˆæ¼¸è¿‘çš„ãªï¼‰ãŠãŠã‚ˆãã®ä¸å¤®å€¤é¸æŠžã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã‚’ä½¿ã£ã¦ã€ï¼ˆæ¼¸è¿‘çš„ãªï¼‰ä¸€èˆ¬å€¤é¸æŠžã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã‚’æ§‹ç¯‰ã—ãŸã‚‚ã®ã§ã‚ã‚‹ã€‚ ã“ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã¯ã€ãƒžãƒŒã‚¨ãƒ«ãƒ»ãƒ–ãƒ©ãƒ ã‚‰[1]ã«ã‚ˆã£ã¦é–‹ç™ºã•ã‚ŒãŸã‚‚ã®ã§ã€è‘—è€…ã®åå—ã®é æ–‡å—ã‚’å–ã£ã¦BFPRTã¨ã‚‚å‘¼ã°ã‚Œã‚‹ã€‚ã“ã®åŽŸè‘—ã§ã¯ä¸å¤®å€¤ã®ä¸å¤®å€¤ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã‚’PICKã¨å‘¼ã³ã€ã‚¯ã‚¤ãƒƒã‚¯ã‚»ãƒ¬ã‚¯ãƒˆã‚’FINDã¨å‘¼ã‚“ã§ã„ãŸã€‚ ã‚¯ã‚¤ãƒƒã‚¯ã‚»ãƒ¬ã‚¯ãƒˆã¯åˆ†å‰²çµ±æ²»æ³•ã§ã‚ã‚Šã€è¨ˆç®—ã®å„æ®µéšŽã§ã€æ®‹ã£ã¦ã„ã‚‹æŽ¢ç´¢å¯¾è±¡ã®è¦ç´ ãŒå€‹ã®å ´åˆã«ã®è¨ˆç®—æ™‚é–“ã‚’å¿…è¦ã¨ã™ã‚‹ã€‚ãã®ãŸã‚ã‚¯ã‚¤ãƒƒã‚¯
iww 2023/01/10
ã‚ã¨ã§å®Ÿè£…ã™ã‚‹

ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ

é…åˆ—

ã‚½ãƒ¼ãƒˆ

ãƒ—ãƒã‚°ãƒ©ãƒ

æ•°å¦
ãƒªãƒ³ã‚¯
Array.isArray() - JavaScript | MDN
// ä»¥ä¸‹ã®å‘¼ã³å‡ºã—ã¯ã™ã¹ã¦ true ã‚’è¿”ã—ã¾ã™ Array.isArray([]); Array.isArray([1]); Array.isArray(new Array()); Array.isArray(new Array("a", "b", "c", "d")); Array.isArray(new Array(3)); // ã‚ã¾ã‚ŠçŸ¥ã‚‰ã‚Œã¦ã„ãªã„ã‚‚ã®ã® Array.prototype ã¯é…åˆ—ã§ã™ Array.isArray(Array.prototype); // ä»¥ä¸‹ã®å‘¼ã³å‡ºã—ã¯ã™ã¹ã¦ false ã‚’è¿”ã—ã¾ã™ Array.isArray(); Array.isArray({}); Array.isArray(null); Array.isArray(undefined); Array.isArray(17); Array.isArray("Array"); Array.is
iww 2022/10/03
ã€Žã‚ã¾ã‚ŠçŸ¥ã‚‰ã‚Œã¦ã„ãªã„ã‚‚ã®ã® Array.prototype ã¯é…åˆ—ã§ã™ã€

JavaScript

é…åˆ—
ãƒªãƒ³ã‚¯
JavaScript ã§ forEach ã‚’ä½¿ã†ã®ã¯æœ€çµ‚æ‰‹æ®µ - Qiita
ã“ã®è¨˜äº‹ã¯ JavaScript2 Advent Calendar 2018 ã®1æ—¥ç›®ã®è¨˜äº‹ã§ã™ã€‚ ã“ã‚“ã°ã‚“ã¯ã€‚@diescake ã§ã™ã€‚ ä»Šå¹´ã¯ã€JavaScript çµŒé¨“ã®æµ…ã„æ–°äººã•ã‚“ã‚„å¤–æ³¨ã•ã‚“ã‚’ãƒªãƒ¼ãƒ‰ã™ã‚‹ç«‹å ´ã¨ã—ã¦ã€ ã¨ã«ã‹ãå¹…åºƒã„ãƒ¡ãƒ³ãƒãƒ¼ã®ã‚³ãƒ¼ãƒ‰ãƒ¬ãƒ“ãƒ¥ãƒ¼ã‚’ã™ã‚‹æ©Ÿä¼šã«æµã¾ã‚ŒãŸã®ã§ã™ãŒã€ äº‹ã‚ã‚‹æ¯Žã« Array.prototype.forEach ã‚’åˆ©ç”¨ã™ã‚‹äººãŒå¤šã‹ã£ãŸãŸã‚ã€åˆå¿ƒè€…å‘ã‘ã«è¦ç‚¹ã‚’æ•´ç†ã—ã¦ã¿ã¾ã—ãŸã€‚ ä»¥ä¸‹ ES2015 ä»¥é™ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’ã‚µãƒãƒ¼ãƒˆã™ã‚‹ãƒ–ãƒ©ã‚¦ã‚¶ã€ã‚ã‚‹ã„ã¯ polyfill ã‚’åˆ©ç”¨ã—ã¦ã„ã‚‹ã“ã¨ã‚’å‰æã¨ã—ã¦ã„ã¾ã™ã€‚ çµè«– é…åˆ—ã«å¯¾ã—ã¦ä½•ã‚‰ã‹ã®æ“ä½œã‚’è¡Œã†éš›ã¯ã€ filter, find, map, reduce ãªã©ã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’åˆ©ç”¨ã§ããªã„ã‹æ¤œè¨Žã—ã€ ã„ãšã‚Œã®ãƒ¡ã‚½ãƒƒãƒ‰ã§ã‚‚å®Ÿç¾ãŒã§ããªã„å ´åˆã®æœ€çµ‚æ‰‹æ®µã¨ã—ã¦ forEach ã‚’é¸æŠžã—ã¾ã—ã‚‡ã†ã€‚ ä¸‹è¨˜ã«ã€ã„ãã¤ã‹ã®ã‚µãƒ³ãƒ—
iww 2022/08/16
JavaScript

é…åˆ—

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
JavaScriptã«ãŠã‘ã‚‹é€£æƒ³é…åˆ—ã®forãƒ«ãƒ¼ãƒ—æ“ä½œ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
iww 2022/05/29
jQueryã®æ–¹ãŒä¾¿åˆ©ã ãª

JavaScript

é…åˆ—
ãƒªãƒ³ã‚¯
PHP: array_map - Manual
Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Su
iww 2022/05/28
é…åˆ—ã«é©ç”¨ã—ã¦æˆ»ã‚Šå€¤ã§å…¥ã‚Œæ›¿ãˆã‚‹ã‚„ã¤ã€‚ trimã¨ã‹ç”¨

php

é…åˆ—
ãƒªãƒ³ã‚¯
Array: length - JavaScript | MDN
æ¨™æº–çµ„ã¿è¾¼ã¿ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆArrayã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ãƒ¼Array() ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ãƒ¼é™çš„ãƒ¡ã‚½ãƒƒãƒ‰Array.from()Array.fromAsync()Array.isArray()Array.of()é™çš„ãƒ—ãƒãƒ‘ãƒ†ã‚£Array[Symbol.species]ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ãƒ¡ã‚½ãƒƒãƒ‰Array.prototype.at()Array.prototype.concat()Array.prototype.copyWithin()Array.prototype.entries()Array.prototype.every()Array.prototype.fill()Array.prototype.filter()Array.prototype.find()Array.prototype.findIndex()Array.prototype.findLast()Array.prototype.find
iww 2022/02/20
JavaScript

é…åˆ—
ãƒªãƒ³ã‚¯
é…åˆ—ã®é•·ã•ã‚’åˆ‡ã‚Šè©°ã‚ã‚‹ (length, splice) | ã¾ãã¾ãJavaScriptãƒŽãƒ¼ãƒˆ
é…åˆ—ã®é•·ã•ã‚’åˆ‡ã‚Šè©°ã‚ã‚‹ (length) é…åˆ—ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã® length ãƒ—ãƒãƒ‘ãƒ†ã‚£ã¯ã€é€šå¸¸é…åˆ—ã®é•·ã•ã‚’èª¿ã¹ã‚‹ãŸã‚ã«å‚ç…§ã—ã¾ã™ãŒã€æ•°å€¤ã‚’ä»£å…¥ã™ã‚‹ã“ã¨ã§é…åˆ—ã®ã‚µã‚¤ã‚ºã‚’å¤‰æ›´ã™ã‚‹ã®ã«ã‚‚ä½¿ç”¨ã§ãã¾ã™ã€‚ length ãƒ—ãƒãƒ‘ãƒ†ã‚£ã«ã€ç¾åœ¨ã®é…åˆ—ã‚µã‚¤ã‚ºã‚ˆã‚Šã‚‚å°ã•ã„å€¤ã‚’ä»£å…¥ã™ã‚‹ã¨ã€é…åˆ—ã®ã‚µã‚¤ã‚ºãŒåˆ‡ã‚Šè©°ã‚ã‚‰ã‚Œã¾ã™ã€‚ var a = [1, 2, 3, 4, 5]; a.length = 3; console.log(a.length); //=> 3 console.log(a); //=> [ 1, 2, 3 ]
iww 2021/09/21
JavaScript

é…åˆ—
ãƒªãƒ³ã‚¯
Array.prototype.unshift() - JavaScript | MDN
æ¨™æº–çµ„ã¿è¾¼ã¿ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆArrayã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ãƒ¼Array() ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ãƒ¼é™çš„ãƒ¡ã‚½ãƒƒãƒ‰Array.from()Array.fromAsync()Array.isArray()Array.of()é™çš„ãƒ—ãƒãƒ‘ãƒ†ã‚£Array[Symbol.species]ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ãƒ¡ã‚½ãƒƒãƒ‰Array.prototype.at()Array.prototype.concat()Array.prototype.copyWithin()Array.prototype.entries()Array.prototype.every()Array.prototype.fill()Array.prototype.filter()Array.prototype.find()Array.prototype.findIndex()Array.prototype.findLast()Array.prototype.find
iww 2021/05/24
é…åˆ—

JavaScript
ãƒªãƒ³ã‚¯
[JavaScript] Mapã¨é€£æƒ³é…åˆ—ã®ç›¸äº’å¤‰æ› - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
iww 2021/03/18
JavaScript

é…åˆ—
ãƒªãƒ³ã‚¯
1 2 3 4 5 6 7 8 æ¬¡ã®ãƒšãƒ¼ã‚¸