PHPのimmutable arrayとは

Quite Night 〜PHP〜 (2023/01/25) 発表資料

Transcript

1. What are immutable arrays in PHP
   1)1ͷJNNVUBCMF
   BSSBZͱ͸
   2VJUF/JHIUʙ1)1ʙ
   
   ൃදࢿྉ
   
   !IOX
   

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2. ࣗݾ঺հ
   ❖ !IOX
   ❖ ॴଐɿ,-BCגࣜձࣾ
   ❖ 8FBSFIJSJOH
   ❖ 1)1ຊମͷ$ιʔείʔυΛಡΉͷ͕झຯ
   ❖ 1)1ຊମͷόάΛ໿݅ใࠂ
   

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3. ࣗݾ঺հ
   1)1FS,BJHJ
   1)1ΧϯϑΝϨϯεؔ੢
   

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4. ຊϓϨθϯͷΰʔϧ
   *NNVUBCMFBSSBZͷ࿩୊Λ௨ͯ͡
   Έͳ͞Μ͕1)1ͷ಺෦࣮૷ʹڵຯΛ࣋ͭ
   

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5. *NNVUBCMFʢϓϩάϥϛϯά༻ޠʣ
   ͬͯ͝ଘ஌Ͱ͠ΐ͏͔
   

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6. *NNVUBCMFͱ͸
   ❖ ʮ஋ͷมߋ͕Ͱ͖ͳ͍ʯͷҙຯ
   ❖ ྫɿ1ZUIPOͷUVQMF
   ❖ JNNVUBCMFͳσʔλߏ଄
   ❖ ೚ҙݸͷఆ਺ͷ૊Λදݱ͢Δ
   ❖ ཁૉͷॻ͖׵͑ɾ௥Ճɾ࡟আ͸Ͱ͖ͳ͍
   

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7. 1)1ͷJNNVUBCMFBSSBZͱ͸
   ❖ 1)1ͷݴޠ࢓্༷ͷ֓೦Ͱ͸ͳ͍
   ❖ ެࣜϚχϡΞϧ౳ʹ͸ొ৔͠ͳ͍
   ❖ શΩʔɾશཁૉ͕ϦςϥϧͰ͋Δ഑ྻͷ಺෦࣮૷্ͷ໊લ
   ❖ 1)1ͷߴ଎ԽϓϩδΣΫτͰJNNVUBCMFBSSBZʹಛԽ
   ͨ͠࠷దԽ͕࣮૷͞Εͨ
   

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8. 1)1ͷ஌ΒΕ͟Δੑೳվળ
   ❖ ϨίʔυɺΧϥϜͷ࣍ݩ഑ྻΛฦ͢ྫ
   function foo() {
   return [
   "x1"=>["foo"=>1,"bar"=>2/* (ུ) */,"thud"=>13],
   "x2"=>["foo"=>1,"bar"=>2/* (ུ) */,"thud"=>13],
   /* ໿30000ߦলུ */
   "x30000"=>["foo"=>1,"bar"=>2/* (ུ) */,"thud"=>13],
   ];
   }
   foo();
   

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9. 1)1ͷ஌ΒΕ͟Δੑೳվળ
   ❖ 1)1ͱൺ΂ͯ1)1͸ஈҧ͍ʹ଎͍
   

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10. 1)1ͷ஌ΒΕ͟Δੑೳվળ
    ❖ 01DBDIF֦ுͳͩ͠ͱࠩ͸ഒఔ౓
    

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11. ͜Ε΄Ͳͷ଎౓͕ࠩ
    ͳͥੜ·ΕΔͷ͔ʁ
    

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12. 1)1͸Ͳ͏࣮ߦ͞Ε͍ͯΔ͔ʁ
    
    ❖ 1)1εΫϦϓτ͸ͦͷ··Ͱ͸࣮ߦͰ͖ͳ͍
    ❖ PQDPEFྻʹίϯύΠϧͯ͠;FOE7.্Ͱ࣮ߦ͢Δ
    ίϯύΠϧॲཧ
    7.࣮ߦ
    PQDPEF
    1)1
    

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13. ;FOE7.ͱ͸
    ❖ PQDPEFʢ7.໋ྩʣΛ࣮ߦ͢ΔԾ૝$16࣮૷
    ❖ ೋஈߏ͑ͷ࣮૷
    ❖ εΫϦϓτݴޠ͔ΒPQDPEF΁ͷม׵ث
    ❖ PQDPEFͷ࣮ߦث
    

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14. 1)1͸Ͳ͏࣮ߦ͞Ε͍ͯΔ͔ʁ
    
    ❖ 01DBDIF͸PQDPEFΛΩϟογϡ͢Δ
    ❖ ճ໨Ҏ߱ͷ࣮ߦ࣌ʹίϯύΠϧॲཧΛεΩοϓͰ͖Δ
    ίϯύΠϧॲཧ
    7.࣮ߦ
    ࠷దԽ
    PQDPEF
    PQDPEF
    Ωϟογϡ
    PQDPEF
    1)1
    

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15. ௨ৗͷ഑ྻߏங
    ❖ ௨ৗɺ഑ྻߏங͸PQDPEFྻʹίϯύΠϧ͞ΕΔ
    ❖ ʮ഑ྻʹཁૉΛ௥Ճ͢Δʯ͕ݸͷPQDPEF
    ❖ ສཁૉͷ഑ྻͳΒ7.໋ྩΛສճ࣮ߦ
    1)1ϓϩηε ڞ༗ϝϞϦ
    ʢ01DBDIF؅ཧʣ
    ഑ྻߏஙͷPQDPEF
    ʜ
    ഑ྻͷ࣮ମ
    ഑ྻߏங
    

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16. 1)1ͷJNNVUBCMFBSSBZ
    ❖ 1)1Ͱ͸JNNVUBCMFBSSBZͷ࣮ମ͕Ωϟογϡର৅
    ❖ 7.໋ྩΛ࣮ߦͤͣʹߏஙࡁΈ഑ྻʹΞΫηεͰ͖Δ
    ڞ༗ϝϞϦ
    ʢ01DBDIF؅ཧʣ
    ഑ྻͷ࣮ମ
    1)1ϓϩηε
    ෆม഑ྻ΁ͷΞΫηε
    

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17. 1)1ͷJNNVUBCMFBSSBZ
    ❖ 1)1Ͱ͸JNNVUBCMFBSSBZͷ࣮ମ͕Ωϟογϡର৅
    ❖ ϓϩηεؒͰ࣮ମΛڞ༗Ͱ͖ΔͷͰলϝϞϦ
    ڞ༗ϝϞϦ
    ʢ01DBDIF؅ཧʣ
    ഑ྻͷ࣮ମ
    1)1ϓϩηε 1)1ϓϩηε
    1)1ϓϩηε
    

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18. ·ͱΊ
    ❖ ࠷ۙͷ1)1ͩͱJNNVUBCMFBSSBZ͸ߴ଎ɾলϝϞϦ
    ❖ શΩʔɾશཁૉ͕Ϧςϥϧͷ഑ྻʹಛԽͨ͠࠷దԽ
    ❖ ഑ྻͷ࣮ମ͕01DBDIFͷΩϟογϡର৅
    ❖ શ1)1ϓϩηεͰಉ࣮͡ମΛڞ༗
    ❖ 1)1ͷ಺෦࣮૷ʹڵຯΛ࣋ͬͯ΋Β͑ͨΒخ͍͠Ͱ͢
    ❖ 4MBDLάϧʔϓQIQVTFSTKBͰօ͞ΜϚχΞοΫͳ࿩Λ
    ͯͨ͠Γ͠·͢ɺ͓קΊͰ͢ʢṖͷએ఻ʣ
    

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19. ͝੩ௌ
    ͋Γ͕ͱ͏
    ͍͟͝·ͨ͠
    

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20. ೦ͷͨΊ஫ҙ
    ❖ ͜ͷखͷੑೳൺֱΛਅʹड͚͗͢ͳ͍ͰԼ͍͞😉
    ❖ ϘτϧωοΫҎ֎Λ଎ͯ͘͠΋શମ΁ͷӨڹ͸ܰඍ
    ❖ େ఍ͷݱ৔Ͱ͸ੑೳΑΓอकੑ͕େࣄ
    

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21. ิ଍ςετ؀ڥͷৄࡉ
    ❖ .BDNJOJ
    
    ❖ 04NBD04.PKBWF
    ❖ $16()[*OUFM$PSFJ
    ❖ NFNPSZ(#
    ❖ OHJOYQIQGQN
    

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22. 201DBDIF༗ޮͰ΋ॳճΞΫηε࣌͸ॏ͍ΑͶʁ
    ❖ :FT
    ❖ ॳճΞΫηεͩͱίϯύΠϧॲཧ͔Β૸ΔͷͰɺ഑ྻߏ
    ங͢Δͷʹཁૉ਺෼ͷPQDPEF࣮ߦ͕ඞཁͰ͢
    ❖ ॳճΞΫηε࣌ʹߏஙͨ͠഑ྻͷ࣮ମ͕Ωϟογϡ͞Ε
    ͯճ໨Ҏ߱͸࢖͍·Θ͞Ε·͢
    

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23. 21)1ͷ഑ྻ͸શ෦Ωϟογϡର৅ʁ
    ❖ Ωʔ͔஋ʹͭͰ΋ม਺͕ೖ͍ͬͯͨΒPQDPEFྻʹί
    ϯύΠϧ͞Εͯෆม഑ྻͷԸܙ͸ड͚ΒΕ·ͤΜ
    ❖ ڊେ഑ྻͳΜ͚ͩͲෆม͡Όͳ͍৔߹ɺෆม෦෼͚ͩ
    ผ഑ྻʹ੾Γग़͢ͱੑೳվળʹͳΔՄೳੑ͕͋Γ·͢
    

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24. 2ෆม഑ྻΛॻ͖׵͑ͨΒͲ͏ͳΔʁ
    ❖ ίϐʔΦϯϥΠτʹΑΓίϐʔ͞Εͯॻ͖׵ΘΓ·͢
    ❖ ෆมʹڞ༗ϝϞϦ্ͷΩϟογϡͷѻ͍
    ❖ ϓϩάϥϚ໨ઢͰͷ࢖͍উख͸Կ΋มΘΒͳ͍
    

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