Introduction of Lambda

Introduction of lambda for beginners.

Transcript

1. ϥϜμࣜೖ໳
2. ϥϜμࣜ ࢖ͬͯ·͔͢ʁ
3. ͜Μͳ΍ͭ OBNF
   
   OBNF
   
   l
   IFMMPz
4. ͜Μͳ΍ͭ Y
   Z
   
   NPWF Y
   Z 
5. ͜Μͳ΍ͭ UISPXBCMF
   
   \
   
   
   
   TFU-PBEJOH7JTJCJMJUZ 7JFX(0/& 
   
   
   
   JG
   DBMMCBDL
   
   OVMM
   \
   
   
   
   
   
   DBMMCBDLTIPX&SSPS 3TUSJOHDPOUSJCVUPST@MPBE@GBJMFE 
   
   
   
   ^
   
   
   
   5JNCFSUBH 5"( F UISPXBCMF
   'BJMFE
   UP
   TIPX
   DPOUSJCVUPSTz 
   ^  https://github.com/DroidKaigi/conference-app-2017/commit/ 6c8f48d7f2de803a0db06c66b639f782681c96a4
6. ʁ
7. ϥϜμࣜೖ໳ ʢJavaʣ
8. ϥϜμࣜ ͱ͸ʁ
9. ಗ໊ϝιουΛ ࣜͱͯ͠ѻ͏ͨΊͷߏจ※ ※ ݫີʹ͸ɼϓϩάϥϛϯάݴޠ͝ͱʹ ɹఆ͕ٛҟͳΔ ͬ͘͟Γݴ͏ͱ……
10. ͨͱ͑͹ɼ਺஋ JOU
    WBMVF
    
    
11. ͨͱ͑͹ɼಗ໊Ϋϥε 3VOOBCMF
    SVOOFS
    
    
    
    
    
    
    OFX
    3VOOBCMF
    \
    
    
    
    
    
    
    
    
    QVCMJD
    WPJE
    SVO
    \
    
    
    
    
    
    
    
    
    
    
    
    
    
    %P
    8PSL
    
    
    
    
    
    
    
    
    ^
    
    
    
    
    ^
12. ͨͱ͑͹ɼಗ໊ϝιου 3VOOBCMF
    SVOOFS
    
    
    
    
    
    
    
    \
    
    %P
    8PSL
    
    ^
13. ϥϜμࣜ Λ୅ೖͰ͖Δͷ͸ ؔ਺ܕΠϯλϑΣʔεͷΈ
14. ؔ਺ܕΠϯλϑΣʔεʁ ࣮૷͕ඞཁͳந৅ϝιουΛ 1͚ͭͩ࣋ͭΠϯλʔϑΣʔε
15. QVCMJD
    JOUFSGBDF
    3VOOBCMF
    \
    
    
    
    
    WPJE
    SVO 
    ^
16. QVCMJD
    JOUFSGBDF
    0O$MJDL-JTUFOFS
    \
    
    
    
    
    WPJE
    PO$MJDL 7JFX
    W 
    ^
17. ؔ਺ܕΠϯλʔϑΣʔεม਺ = ϥϜμࣜ
18. 0O$MJDL-JTUFOFS
    MJTUFOFS
    
    
    
    
    
    W
    
    \
    
    %P
    8PSL
    
    ^
19. ϥϜμࣜ ͰԿ͕Ͱ͖Δͷʁ
20. WJFXTFU0O$MJDL-JTUFOFS
    
    
    OFX
    0O$MJDL-JTUFOFS
    \
    
    
    
    
    !0WFSSJEF
    
    
    
    
    QVCMJD
    WPJE
    PO$MJDL 7JFX
    W
    \
    
    
    
    
    
    
    
    %P
    8PSL
    
    
    
    
    ^
    ^  Α͋͘ΔΊΜͲ͍͘͞΍ͭ
21. WJFXTFU0O$MJDL-JTUFOFS
    
    
    OFX
    0O$MJDL-JTUFOFS
    \
    
    
    
    
    !0WFSSJEF
    
    
    
    
    QVCMJD
    WPJE
    PO$MJDL 7JFX
    W
    \
    
    
    
    
    
    
    
    %P
    8PSL
    
    
    
    
    ^
    ^  Α͋͘ΔΊΜͲ͍͘͞΍ͭ
22. WJFXTFU0O$MJDL-JTUFOFS W
    
    \
    
    
    
    
    
    %P
    8PSL
    
    ^  Ҿ਺ͱॲཧʹूதͰ͖Δʂ
23. Stream API RxʢReactive Extensionʣ
24. ·ͨࠓ౓ ঺հ͠·͢
25. ϥϜμࣜ ͷಡΈํ
26. QVCMJD
    JOUFSGBDF
    3VOOBCMF
    \
    
    
    
    
    WPJE
    SVO 
    ^ Ҿ਺ɼ໭Γ஋ͳ͠
27. 
    
    \
    
    %P
    8PSL
    
    ^ Ҿ਺ɼ໭Γ஋ͳ͠
28. QVCMJD
    JOUFSGBDF
    0O$MJDL-JTUFOFS
    \
    
    
    
    
    WPJE
    PO$MJDL 7JFX
    W 
    ^ Ҿ਺̍ͭɼ໭Γ஋ͳ͠
29. 7JFX
    W
    
    \
    
    %P
    8PSL
    
    ^ Ҿ਺̍ͭɼ໭Γ஋ͳ͠
30. W
    
    \
    
    %P
    8PSL
    
    ^ Ҿ਺̍ͭɼ໭Γ஋ͳ͠
31. W
    
    \
    
    %P
    8PSL
    
    ^ Ҿ਺̍ͭɼ໭Γ஋ͳ͠
32. W
    
    \
    WTFU7JTJCMF 7JFX(0/& 
    ^ Ҿ਺̍ͭɼ໭Γ஋ͳ͠
33. W
    
    WTFU7JTJCMF 7JFX(0/&  Ҿ਺̍ͭɼ໭Γ஋ͳ͠
34. QVCMJD
    JOUFSGBDF
    0O%SBH-JTUFOFS
    \
    
    
    
    
    WPJE
    PO%SBH 7JFX
    W
    %SBH&WFOU
    FWFOU 
    ^ Ҿ਺̎ͭɼ໭Γ஋ͳ͠
35. 7JFX
    W
    %SBH&WFOU
    FWFOU
    
    \
    
    %P
    8PSL
    
    ^ Ҿ਺̎ͭɼ໭Γ஋ͳ͠
36. W
    FWFOU
    
    \
    
    %P
    8PSL
    
    ^ Ҿ਺̎ͭɼ໭Γ஋ͳ͠
37. QVCMJD
    JOUFSGBDF
    'PP#BS
    \
    
    
    
    
    4USJOH
    IPHF'VHB 
    ^ Ҿ਺ͳ͠ɼ໭Γ஋͋Γ
38. 
    
    \
    SFUVSO
    lBCDz
    ^ Ҿ਺ͳ͠ɼ໭Γ஋͋Γ
39. 
    
    lBCDz Ҿ਺ͳ͠ɼ໭Γ஋͋Γ
40. QVCMJD
    JOUFSGBDF
    )PHF'VHB
    \
    
    
    
    
    JOU
    GPP#BS JOU
    O 
    ^ Ҿ਺͋Γɼ໭Γ஋͋Γ
41. JOU
    O
    
    \
    SFUVSO
    O
    
    O
    ^ Ҿ਺͋Γɼ໭Γ஋͋Γ
42. O
    
    \
    SFUVSO
    O
    
    O
    ^ Ҿ਺͋Γɼ໭Γ஋͋Γ
43. Ҿ਺͋Γɼ໭Γ஋͋Γ O
    
    \
    SFUVSO
    O
    
    O
    ^
44. Ҿ਺͋Γɼ໭Γ஋͋Γ O
    
    O
    
    O
45. ࠷ॳͷ΍ͭ ಡΊ·͔͢ʁ
46. OBNF
    
    OBNF
    
    l
    IFMMPz
47. Y
    Z
    
    NPWF Y
    Z 
48. UISPXBCMF
    
    \
    
    
    
    TFU-PBEJOH7JTJCJMJUZ 7JFX(0/& 
    
    
    
    JG
    DBMMCBDL
    
    OVMM
    \
    
    
    
    
    
    DBMMCBDLTIPX&SSPS 3TUSJOHDPOUSJCVUPST@MPBE@GBJMFE 
    
    
    
    ^
    
    
    
    5JNCFSUBH 5"( F UISPXBCMF
    'BJMFE
    UP
    TIPX
    DPOUSJCVUPSTz 
    ^  https://github.com/DroidKaigi/conference-app-2017/commit/ 6c8f48d7f2de803a0db06c66b639f782681c96a4
49. ϥϜμࣜ ࢖ͬͯΈ·ͤΜ͔ʁ
50. Retrolambda https://github.com/orfjackal/retrolambda