[B! debug] ymm1xã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

ymm1x id:ymm1x

debugã«é–¢ã™ã‚‹ymm1xã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (47)

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Kernel.#trace_var (Ruby 3.3 ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«)
trace_var(varname, hook) -> nil[permalink][rdoc][edit] trace_var(varname) {|new_val| .... } -> nil trace_var(varname, hook) -> [String|Proc] ã‚°ãƒãƒ¼ãƒãƒ«å¤‰æ•° varname ã¸ã®ä»£å…¥ã®ãƒ•ãƒƒã‚¯ã‚’ç™»éŒ²ã—ã¾ã™ã€‚ ã“ã“ã§ã®ã€Œã‚°ãƒãƒ¼ãƒãƒ«å¤‰æ•°ã€ã¯ã€ç‰¹æ®Šå¤‰æ•° (å¤‰æ•°ã¨å®šæ•°/çµ„ã¿è¾¼ã¿å¤‰æ•° ã‚’å‚ç…§)ã‚‚å«ã‚ãŸ `$' ã§å§‹ã¾ã‚‹å¤‰æ•°ã®ã“ã¨ã§ã™ã€‚ ã“ã®å‘¼ã³å‡ºã—ä»¥é™ã€varname ã§æŒ‡å®šã—ãŸã‚°ãƒãƒ¼ãƒãƒ«å¤‰æ•°ã«å€¤ãŒä»£å…¥ã•ã‚Œã‚‹ãŸã³ã« hook ã‹ãƒ–ãƒãƒƒã‚¯ãŒè©•ä¾¡ã•ã‚Œã¾ã™ã€‚hook ãŒ Proc ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®å ´åˆä»£å…¥ã•ã‚ŒãŸå€¤ãŒãƒ–ãƒãƒƒã‚¯å¼•æ•°ã«æ¸¡ã•ã‚Œã¾ã™ã€‚æ–‡å—åˆ—ã®å ´åˆã¯Rubyã‚³ãƒ¼ãƒ‰ã¨ã—ã¦è©•ä¾¡ã•ã‚Œã¾ã™ã€‚ trace_var ãŒãƒ•ãƒƒã‚¯ã™ã‚‹ã®ã¯æ˜Žç¤ºçš„ãªä»£å…¥ã ã‘ã§ã™ã€‚ãƒ•ãƒƒã‚¯ã¯è¤‡æ•°ç™»éŒ²ã§ãã¾ã™ã€‚
ymm1x 2021/06/20
ruby

debug
ãƒªãƒ³ã‚¯
Kernel.#caller (Ruby 3.3 ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«)
caller(start = 1) -> [String] | nil[permalink][rdoc][edit] caller(start, length) -> [String] | nil caller(range) -> [String] | nil start æ®µä¸Šã®å‘¼ã³å‡ºã—å…ƒã®æƒ…å ±ã‚’ $@ ã®å½¢å¼ã®ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹(æ–‡å—åˆ—ã®é…åˆ—)ã¨ã—ã¦è¿”ã—ã¾ã™ã€‚ ãƒˆãƒƒãƒ—ãƒ¬ãƒ™ãƒ«ã§ã¯ç©ºã®é…åˆ—ã‚’è¿”ã—ã¾ã™ã€‚caller ã®æˆ»ã‚Šå€¤ã‚’ $@ ã«ä»£å…¥ã™ã‚‹ã“ã¨ã§ä¾‹å¤–ã®ç™ºç”Ÿä½ç½®ã‚’è¨å®šã§ãã¾ã™ã€‚ å¼•æ•°ã§æŒ‡å®šã—ãŸå€¤ãŒç¯„å›²å¤–ã®å ´åˆã¯ nil ã‚’è¿”ã—ã¾ã™ã€‚ [PARAM] start: long ã®ç¯„å›²ã‚’è¶…ãˆãªã„æ£ã®æ•´æ•°ã§ã‚¹ã‚¿ãƒƒã‚¯ãƒ¬ãƒ™ãƒ«ã‚’æŒ‡å®šã—ã¾ã™ã€‚ [PARAM] length: å–å¾—ã™ã‚‹ã‚¹ã‚¿ãƒƒã‚¯ã®å€‹æ•°ã‚’æŒ‡å®šã—ã¾ã™ã€‚ [PARAM] range: å–å¾—ã—ãŸã„ã‚¹ã‚¿ãƒƒã‚¯ã®ç¯„å›²ã‚’ç¤ºã™ Range ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’æŒ‡å®šã—ã¾ã™ã€‚
ymm1x 2021/06/20
ruby

debug
ãƒªãƒ³ã‚¯
Rubyã§GETãƒªã‚¯ã‚¨ã‚¹ãƒˆã‚„POSTãƒªã‚¯ã‚¨ã‚¹ãƒˆã—ãŸæ™‚ã®ãƒ¡ãƒ¢ - Qiita
var http = require('http'); var server = http.createServer(function (req,res) { // confirm request console.log(`headers: ${JSON.stringify(req.headers)}`); console.log(`httpVersion: ${req.httpVersion}`); console.log(`method: ${req.method}`); console.log(`url: ${req.url}`); // response res.writeHeader(200, {'Content-Type': 'application/json'}); res.end(JSON.stringify({ 'foo': 'bar'})); }); server.li
ymm1x 2021/06/19
Node.js ã§ç¢ºèªç”¨ã‚µãƒ¼ãƒãƒ¼ã‚’ç«‹ã¦ã¦å®Ÿéš›ã«é€ä¿¡ã•ã‚Œã‚‹ãƒ˜ãƒƒãƒ€ãªã©ã‚’ç¢ºèª

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ruby

node.js

debug
ãƒªãƒ³ã‚¯
JavaScript ã§ print ãƒ‡ãƒãƒƒã‚°æ™‚ã«å¤‰æ•°åã‚’å‡ºåŠ›ã™ã‚‹ - mizdra's blog
æ•°åˆ—ã®å’Œã‚’æ±‚ã‚ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ä½œæˆã™ã‚‹ã“ã¨ã«ãªã‚Šã€æ„æ°—æšã€…ã¨ä»¥ä¸‹ã®ã‚ˆã†ãªãƒ—ãƒã‚°ãƒ©ãƒ ã‚’æ›¸ã„ãŸã¨ã„ã†çŠ¶æ³ã‚’æƒ³åƒã—ã¦ä¸‹ã•ã„ã€‚ function sum(nums, acc = 0) { if (nums.length === 0) return 0; if (nums.length === 1) return nums[0]; return sum(nums.slice(1), acc + nums[0]); } const nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; console.log(sum(nums)); // expected: 55 ä¸€è¦‹ã™ã‚‹ã¨ä½•ã‚‚å•é¡Œãªã•ãã†ã«è¦‹ãˆã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã§ã™ãŒã€å®Ÿã¯ãƒã‚°ãŒã‚ã‚Šã¾ã™ (çš†ã•ã‚“åˆ†ã‹ã‚Šã¾ã™ã‹?) *1ã€‚å®Ÿéš›ã«ä¸Šè¨˜ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’å®Ÿè¡Œã™ã‚‹ã¨ 55 ã§ã¯ãªã 10 ãŒå‡ºåŠ›ã•ã‚Œã¾ã™ã€‚ ã“ã†ã—ãŸå ´é¢ã«éé‡ã™ã‚‹ã¨ã€è‡ªç„¶ã¨ sum
ymm1x 2021/05/03
javascript

debug

chrome
ãƒªãƒ³ã‚¯
Chrome Devtoolã®monitorã‚’ä½¿ã†ã¨é–¢æ•°ã®å‘¼ã³å‡ºã—ã‚’è¦³å¯Ÿã§ãã¦ä¾¿åˆ© - ã±ã™ãŸã‘æ—¥è¨˜
ã‚’èªã‚“ã§æ€ã„å‡ºã—ãŸã®ã§ã”ç´¹ä»‹ã§ã™ã€‚ å…ƒã®è¨˜äº‹ã¨åŒæ§˜ã«ä»¥ä¸‹ã®é–¢æ•° sum ã«ã¤ã„ã¦ã€ function sum(nums, acc = 0) { console.log({ nums, acc }); if (nums.length === 0) return 0; if (nums.length === 1) return nums[0]; return sum(nums.slice(1), acc + nums[0]); } ã“ã®é–¢æ•°sumã®å¼•æ•° (nums ã¨ acc) ã®å‘¼ã³å‡ºã—ã”ã¨ã®å¤‰åŒ–ã‚’è¦‹ãŸã„å ´åˆã¯ã€æ‰€è¬‚ãƒ—ãƒªãƒ³ãƒˆãƒ‡ãƒãƒƒã‚°ã‚„ debugger ã‚’ä½¿ã†ã®ã¯ä¸€èˆ¬çš„ãªãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã¨ã—ã¦ã‚ˆãçŸ¥ã‚‰ã‚Œã¦ã„ã¾ã™ãŒã€ã“ã®ã‚ˆã†ãªé–¢æ•°å‘¼ã³å‡ºã—æ™‚ã®å¼•æ•°ã‚’çŸ¥ã‚ŠãŸã„å ´åˆã¯monitor(function)ã¨ã„ã†é–¢æ•°ã‚’ä½¿ã†ã“ã¨ã§åŒæ§˜ã®åŠ¹æžœã‚’å¾—ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚ ã“ã®å ´åˆã¯ monitor(sum)ã¨ã—ãŸå¾Œã«ã€é–¢
ymm1x 2021/05/03
javascript

debug

chrome
ãƒªãƒ³ã‚¯
chrome devtools ã® tips Né€£ç™º - mizdra
mizdra.icon ãŒç¤¾å†…å‘ã‘ã«ç™ºè¡¨ã—ãŸè³‡æ–™ãªã®ã§ã™ãŒã€æŠ˜è§’ãªã®ã§ä¸€èˆ¬å‘ã‘ã«æ›¸ãç›´ã—ã¦å…¬é–‹ã—ã¾ã™ã€‚
ymm1x 2021/04/03
###

chrome

debug

tips
ãƒªãƒ³ã‚¯
Object#tap (Ruby 3.3 ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«)
tap {|x| ... } -> self[permalink][rdoc][edit] self ã‚’å¼•æ•°ã¨ã—ã¦ãƒ–ãƒãƒƒã‚¯ã‚’è©•ä¾¡ã—ã€self ã‚’è¿”ã—ã¾ã™ã€‚ ãƒ¡ã‚½ãƒƒãƒ‰ãƒã‚§ã‚¤ãƒ³ã®é€”ä¸ã§ç›´ã¡ã«æ“ä½œçµæžœã‚’è¡¨ç¤ºã™ã‚‹ãŸã‚ã«ãƒ¡ã‚½ãƒƒãƒ‰ãƒã‚§ã‚¤ãƒ³ã« "å…¥ã‚Šè¾¼ã‚€" ã“ã¨ãŒã€ã“ã®ãƒ¡ã‚½ãƒƒãƒ‰ã®ä¸»ç›®çš„ã§ã™ã€‚ (1..10) .tap {|x| puts "original: #{x}" } .to_a .tap {|x| puts "array: #{x}" } .select {|x| x.even? } .tap {|x| puts "evens: #{x}" } .map {|x| x*x } .tap {|x| puts "squares: #{x}" } [SEE_ALSO] Object#yield_self
ymm1x 2021/03/24
ruby

debug
ãƒªãƒ³ã‚¯
Rubyã§ãƒ¡ã‚½ãƒƒãƒ‰ã®å®šç¾©å ´æ‰€ã‚’è¦‹ã¤ã‘ã‚‹æ–¹æ³• - Qiita
Rubyã¯Moduleã§çµ„ã¿è¾¼ã¾ã‚ŒãŸãƒ¡ã‚½ãƒƒãƒ‰ã‚„ã€method_missingã‚’åˆ©ç”¨ã—ãŸã€Œã‚´ãƒ¼ã‚¹ãƒˆãƒ¡ã‚½ãƒƒãƒ‰ã€ãªã©ã€è‡ªåˆ†ã®è¦‹ã¦ã„ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ãŒãã®ã‚¯ãƒ©ã‚¹ä»¥å¤–ã®ã©ã“ã§å®šç¾©ã•ã‚Œã¦ã„ã‚‹ã®ã‹ã€åˆ†ã‹ã‚Šã«ãã„ã‚±ãƒ¼ã‚¹ãŒã‚ˆãã‚ã‚Šã¾ã™ã€‚ ç‰¹ã«Javaã‚„C#ã‹ã‚‰ç§»ã£ã¦ããŸåƒ•ã®ã‚ˆã†ãªãƒ—ãƒã‚°ãƒ©ãƒžã¯ã€ã€Œãƒ¡ã‚½ãƒƒãƒ‰ = ã©ã“ã‹ã®ã‚¯ãƒ©ã‚¹ã§å®šç¾©ã•ã‚Œã¦ã„ã‚‹ã‚‚ã®ã€ã¨ã„ã†å°è±¡ãŒå¼·ã„ã®ã§ã€ã€ŒæŒã¡ä¸»ãŒã‚ˆãåˆ†ã‹ã‚‰ãªã„ãƒ¡ã‚½ãƒƒãƒ‰ã€ã®å˜åœ¨ã¯ãƒ‡ãƒãƒƒã‚°ç‰ã§è‹¦åŠ´ã•ã›ã‚‰ã‚Œã¾ã™ã€‚ ã“ã†ã„ã£ãŸã‚±ãƒ¼ã‚¹ã§ã¯ã€Kernel#methodã¨Method#source_locationã‚’çµ„ã¿åˆã‚ã›ã‚‹ã“ã¨ã§ã€ãƒ¡ã‚½ãƒƒãƒ‰ã®å®šç¾©å ´æ‰€ã‚’è¦‹ã¤ã‘ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ ãŸã¨ãˆã°ã€rails consoleã§blank?ãƒ¡ã‚½ãƒƒãƒ‰ã®å®šç¾©å ´æ‰€ã‚’è¦‹ã¤ã‘ãŸã„å ´åˆã¯ã€ã“ã‚“ãªæ„Ÿã˜ã§ã™ã€‚
ymm1x 2021/03/04
ruby

debug

tips
ãƒªãƒ³ã‚¯
Ruby_ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ãƒªãƒ¼ãƒ‡ã‚£ãƒ³ã‚°ã®æ¦å™¨
ymm1x 2021/03/04
ruby

debug

tips
ãƒªãƒ³ã‚¯
Rubyã§classã‚„constã®å®šç¾©ä½ç½®ã‚’èª¿ã¹ã‚‹æ–¹æ³• - Qiita
> Some = 1 # class (irb):1: warning: already initialized constant Some ./some.rb:123: warning: previous definition of Some was here > Some::VALUE = 1 # const (irb):2: warning: already initialized constant Some ./some.rb:125: warning: previous definition of Some was here èƒŒæ™¯ Rubyã§ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚³ãƒ¼ãƒ‰ã‚’èªã‚“ã§ã„ã‚‹ã¨ã€ã€Œãˆã€ã“ã®class or const(å¤§æ–‡å—è‹±å—ã§å§‹ã¾ã‚‹ã„ã‚ã‚†ã‚‹å®šæ•°)ã®å®šç¾©ä½ç½®ã¯ã©ã“ã ï¼Ÿã€ã¨ã„ã†ç–‘å•ãŒæ¹§ã„ã¦ãã‚‹ã“ã¨ãŒã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚ ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚³ãƒ¼ãƒ‰ã®å ´åˆã€æ²¢å±±ã®gemã‚’èªã¿è¾¼ã‚“ã§ã„ã‚‹ãŸã‚ã€
ymm1x 2021/03/04
ruby

debug

tips
ãƒªãƒ³ã‚¯
Goã§SQLã«ãƒˆãƒ¬ãƒ¼ã‚·ãƒ³ã‚°ã‚³ãƒ¡ãƒ³ãƒˆã‚’åŸ‹ã‚è¾¼ã‚“ã§å®Ÿè¡Œã™ã‚‹ | ãŠãã‚‰ãã¯ãã‚Œã•ãˆã‚‚å¹³å‡¡ãªæ—¥ã€…
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ymm1x 2021/02/03
sql

debug
ãƒªãƒ³ã‚¯
ãƒ‡ãƒãƒƒã‚°æ™‚ã¯printã§ã¯ãªãã€Icecreamã‚’ä½¿ã†ã¨ä¾¿åˆ© - Qiita
ã¨ãªã‚Šã¾ã™ã€‚ã•ã¦ã€ä¸Šã®å‡ºåŠ›ã‚’è¦‹ã¦30ã¨40ãŒnum1ã¨num2ã®ã©ã¡ã‚‰ã«å¯¾å¿œã—ã¦ã„ã‚‹ã‹ã™ãã«åˆ¤åˆ¥ãŒã¤ãã§ã—ã‚‡ã†ã‹ï¼Ÿ å‡ºåŠ›å¤‰æ•°ãŒå°‘ãªã„ã†ã¡ã¯ã“ã‚Œã§ã‚‚å•é¡Œã¯ãªã•ãã†ã§ã™ãŒ5å€‹ã¨ã‹ã«ãªã‚‹ã¨å°‘ã—é¢å€’ãã•ããªã‚Šã¾ã™ãã€‚ ã¨ã‚Šã‚ãˆãšã®è§£æ±ºç–ã¨ã—ã¦æ¬¡ã®ã‚ˆã†ã«ã™ã‚Œã°è‰¯ã„ã§ã—ã‚‡ã†ã€‚
ymm1x 2021/01/18
python

debug
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ymm1x 2019/08/08
game

debug
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ymm1x 2019/07/14
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docker

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ymm1x 2019/05/24
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javascript

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ymm1x 2019/04/03
debug

javascript
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ymm1x 2018/09/20
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ymm1x 2018/09/18
javascript

debug
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ymm1x 2018/09/18
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javascript

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ymm1x 2018/04/27
node.js

debug
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