1 ࠓ೔ͷ”Ͳ͏ॻ͘”໰୊ͷ ΞϧΰϦζϜྫ 2019/02/13 #nagoyaphp /39 

๻ʹ͍ͭͯ 2/39 

͖ͨͭͪʢ໊͋ͩʣ 3 • (ג)ΧϧςοτίϛϡχέʔγϣϯζCTO • WebΤϯδχΞྺ7೥ɺPHPྺ7೥ • #nagoyaphpʊ • #symfony_meetup /39 

͖ͨͭͪʢ໊͋ͩʣ 4 • ͓ख఻͍ͨ͠ຊʢ2015/12ʣ • Schooߨࢣʢ2018/04ʣ ʮGitHubΛ࢖ͬͨσϓϩΠࣗಈԽ࣮ફʯ ʮجຊ͔Β͔ͬ͠ΓֶͿ Symfony2ೖ໳ʯ /39 

ͨ ͭ ͖ ͪ twitter.com/ttskch ͋͞ɺ͋ͳͨ΋ࠓ͙͢ϑΥϩʔ͠Α͏!!! ׬શແྉ ·͞ʹ໊ݴ੡଄ػ ਓੜͰେ੾ͳ͜ͱ͸ɺ͢΂ͯ ͖͔ͨͭͪΒڭΘͬͨ ͖ͨͭͪΛϑΥϩʔͨ͠Β
 ࠊ௧͕࣏Γ·ͨ͠ 100% φϯτʂ ϑΥϩϫʔ͔Βͷࢧ࣋཰ 100% ͍ͯ͠Δ ͍ͯ͠ͳ͍ ϑΥϩϫʔ͞Μ100ਓʹฉ͖·ͨ͠ ͖ͨͭͪΛϑΥϩʔ͍ͯ͠Δʁ 5/39 

ձࣾʹ͍ͭͯ 6/39 

(ג)Χϧςοτίϛϡχέʔγϣϯζ 7 https://quartet-communications.com /39 

(ג)Χϧςοτίϛϡχέʔγϣϯζ 8 https://www.google.co.jp/search?q=Χʔςϯ /39 

(ג)Χϧςοτίϛϡχέʔγϣϯζ 9 https://lisket.jp /39 

We are hiring!ʢϚδͰʣ 10 • PHPer/JSer ઈࢍେืूதʂʢϦϞʔτ΍όΠτ΋Մʣ • Symfony+Angular ͰɺWeb޿ࠂۀքΛ
 ϗϫΠτʹ͢Δ࢓૊ΈΛ࡞ͬͯ·͢ • ܦӦϏδϣϯ͸ʮੈքҰޮ཰తͳ୅ཧళʯ /39 

We are hiring!ʢϚδͰʣ 11 • ࣗࣾαʔϏεʮLisketʯͰࣗࣾͷۀ຿΋ޮ཰Խ • શࣾһͷฏۉ࢒ۀ͕࣌ؒ5h/݄͙Β͍Ͱ͢ ಛผ৆ड৆ /39 

We are hiring!ʢϚδͰʣ 12 ΤϯδχΞͷಇ͖΍͢͞௒େࣄʹͯ͠·͢✨ /39 

We are hiring!ʢϚδͰʣ 13 ·ͣ͸͓࿩͚ͩͰ΋ʂؾܰʹ੠͔͚͍ͯͩ͘͞ /39 

14 ࠓ೔ͷ”Ͳ͏ॻ͘”໰୊ͷ ΞϧΰϦζϜྫ 2019/02/13 #nagoyaphp /39 

໰୊ͷ಺༰ 15 http://nabetani.sakura.ne.jp/hena/orde17palin/ /39 

$count = 0; for ($i = $min; $i < $max; $i++) { $number = base_convert(strval($i), 10, $base); if ($number === strrev($number)) { $count++; } } return $count; 16 ࠷ॳʹॻ͍ͨίʔυ ۪௚ʹ૯౰ͨΓͰ൑ఆ͍ͯ͘͠΍ͭ /39 

public function dataProvider() { return [ ['12,34,5', 5], ['10,11,10', 0], ['1,100,3', 18], : : ['66160071,153732445,5', 5605], ['18799557,189007582,14', 33741], ['78547566,225312226,20', 18346], ['143084571,506549072,18', 62323], ['2099642384,2789567569,6', 14787], ]; } 17 ςετέʔε /39 

݁Ռ 18 ܭࢉྔ͕େ͖͗ͯ͢λΠϜΞ΢τ… /39 

ͪΐͬͱ ಄Λ࢖ͬͯΈΔ 19/39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 123 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 123 131 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 123 131 141 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 123 131 141 151 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 123 131 141 151 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

ਓؒ͸Ͳ͏΍ͬͯղ͍͍ͯΔ͔ 20 • 1ͣͭ૿΍͠ͳ͕Βʮ͜Ε͸ճจ਺͔ʁʯ ͳΜͯ΍ͬͯͳ͍ • ճจ਺͕ࠨӈରশͳ͜ͱΛར༻͍ͯ͠Δ • ࠨ൒෼Λ1ͣͭ૿΍͠ͳ͕ΒڸจࣈྻΛ ࡞ͬͯΔ 123 131 141 151 ྫʣ10ਐ਺ͷ123ʙ150Ͱճจ਺Λ୳͢৔߹ /39 

͍͔ͭ͘ύλʔϯ͕͋Δͳʁ 21 • ܻ਺͕ۮ਺͔ح਺͔ʢ123ͱ1234ʣ • ࠨ൒෼Λͦͷ··൓స͢Δ͔ɺ1૿΍͔ͯ͠Β ൓స͢Δ͔ʢ120→121ͱ123→131ʣ • ࠨ൒෼Λ1૿΍ͨ͠ͱ͖ʹܻ਺͕૿͑Δ͔૿͑ ͳ͍͔ʢ99→101ͱ88→99ʣ /39 

/39 ͍͔ͭ͘ύλʔϯ͕͋Δͳʁ 22 • ܻ਺͕ۮ਺͔ح਺͔ʢ123ͱ1234ʣ • ࠨ൒෼Λͦͷ··൓స͢Δ͔ɺ1૿΍͔ͯ͠Β ൓స͢Δ͔ʢ120→121ͱ123→131ʣ • ࠨ൒෼Λ1૿΍ͨ͠ͱ͖ʹܻ਺͕૿͑Δ͔૿͑ ͳ͍͔ʢ99→101ͱ88→99ʣ 

1. ܻ਺͕ۮ਺͔ح਺͔ 23 ࠨ൒෼ ӈ൒෼ ճจ਺ͷܻ਺  12 23 3  12 34 4  123 345 5  123 456 6 ح਺ܻͷ৔߹͸ɺਅΜதͷܻΛࠨӈ྆ํʹؚΊΔ /39 

/39 ͍͔ͭ͘ύλʔϯ͕͋Δͳʁ 24 • ܻ਺͕ۮ਺͔ح਺͔ʢ123ͱ1234ʣ • ࠨ൒෼Λͦͷ··൓స͢Δ͔ɺ1૿΍͔ͯ͠Β ൓స͢Δ͔ʢ120→121ͱ123→131ʣ • ࠨ൒෼Λ1૿΍ͨ͠ͱ͖ʹܻ਺͕૿͑Δ͔૿͑ ͳ͍͔ʢ99→101ͱ88→99ʣ 

2. ࠨ൒෼Λ1૿΍͔͢Ͳ͏͔ 25 ࠨ൒෼ ӈ൒෼ ࠨ൒෼ͷ൓స ࣍ͷճจ਺  10 00 01 101  12 20 21 121  12 21 21 131  12 23 21 131 ӈ൒෼ >= ࠨ൒෼ͷ൓స ͷͱ͖͸ࠨ൒෼Λ1૿΍͢ < < >= >= /39 

͍͔ͭ͘ύλʔϯ͕͋Δͳʁ 26 • ܻ਺͕ۮ਺͔ح਺͔ʢ123ͱ1234ʣ • ࠨ൒෼Λͦͷ··൓స͢Δ͔ɺ1૿΍͔ͯ͠Β ൓స͢Δ͔ʢ120→121ͱ123→131ʣ • ࠨ൒෼Λ1૿΍ͨ͠ͱ͖ʹܻ਺͕૿͑Δ͔૿͑ ͳ͍͔ʢ99→101ͱ88→99ʣ /39 

3. ࠨ൒෼Λ1૿΍ܻͯ͠਺͕૿͑Δ͔ 27 1૿΍ͨ͠ͱ͖ʹࠨ൒෼ͷܻ਺͕૿͑Δ৔߹͸
 ճจ਺ͷܻ਺΋ݩͷ਺ࣈΑΓ૿͑Δ ࠨ൒෼ 1૿΍͢ͱ ࣍ͷճจ਺ ճจ਺ͷܻ਺  8 9 99 2  9 10 101 3  19 20 202 3 /39 

ίʔυʹͯ͠ΈΔ 28/39 

$ tree src src ├── Dokaku14.php └── Palindrome ├── Finder.php ├── Generator.php └── Operator.php 29 ΍Δ͜ͱ͕ෳࡶͳͷͰΫϥε෼͚ ࣍ͷճจ਺Λݟ͚ͭΔ αʔϏε ʮࠨ൒෼ʯΛݩʹ ճจ਺Λ࡞ΔαʔϏε จࣈྻʹର͢ΔܭࢉΛ αϙʔτ͢ΔαʔϏε /39 

30 ݺͼग़͠ݩ͸͜Μͳײ͡ $count = 0; $current = base_convert(strval($min - 1), 10, $base); while (base_convert($current, $base, 10) < $max) { $current = $this->finder->findNextPalindrome($current, $base); $count++; } $count--; return $count; ࣍ͷճจ਺·Ͱ௚઀ਐΊΔͷͰܭࢉྔେ෯Χοτ /39 

public function findNextPalindrome(string $number, int $base): string { list($leftHalf, $rightHalf) = $this->operator->cutIntoHalf($number); $palindromeLength = strlen($number); if ($this->operator->compare($rightHalf, strrev($leftHalf), $base) >= 0) { $halfLength = strlen($leftHalf); $leftHalf = $this->operator->increment($leftHalf, $base); if (strlen($leftHalf) > $halfLength) { $palindromeLength++; } } return $this->generator->generate($leftHalf, $palindromeLength); } 31 Finderͷ࣮૷͸͜Μͳײ͡ /39 

ෳࡶʹݟ͑Δ͚Ͳ 32 ͜ΕΒͷॲཧΛ͍ͯ͠Δ͚ͩͰ͢ /39 

GeneratorͱOperator͸ 33 • ಺༰୯७ͳͷͰ͜͜Ͱ͸ׂѪ͠·͢
 ʢGitHubʹ্͕ͬͯΔͷͰݟͯΈ͍ͯͩ͘͞ʣ /39 

ಈ͔ͯ͠ΈΔ 34/39 

35 υϠΝʂ /39 

·ͱΊ 36/39 

ΊͬͪΌ಄࢖ͬͯർΕ·ͨ͠ 37 • ͳΜ͔ͩΜͩ׬੒·Ͱ਺͔͔࣌ؒΓ·ͨ͠ • ࢴͷ্Ͱ࣮ݧ͠ͳ͕Βߟ͑Δͷେࣄˣ /39 

ιʔε͸GitHubʹ্͛ͯ·͢✋ 38 https://github.com/ ttskch/nagoyaphp14 /39 

39 @ttskch ʘThanks!ʗ /39