狠狠撸

1. JAVA

2. 听8 旎るǜ鞀れ花韰愳笭臧滊皽霝�

3. 听

4. 听

5. 听

6. 听

7. 听

8. 听

9. 听頇╆赴順�

10. 1.

11. 听JAVA8鞚�

12. 听欤检殧

13. 听旮半姤

14. 听 2.

15. 听Lambda

16. 听Expression 3.

17. 听Lambda

18. 听Syntax 4.

19. 听Stream

20. 听API

21. 听

22. 鉁� 雮犾 氚� 鞁滉皠 API 鞚� 靸� API毳� 靷毄頃橃棳臧滊皽鞛愲姅雿� 鞛愳棸鞀る熃瓿�, 臧勱舶頃橁碃, 鞚错暣頃橁赴靿毚氚╈嫕鞙茧 雮犾 氚� 鞁滉皠鞚� 觳橂Μ頃� 靾� 鞛堧嫟. 鉁� Nashorn Javascript 鞐旍 靸堧鞖� 瓴诫焿鞚� 瓿犾劚電� JavaScript 鞐旍鞚� 甑槃霅橃柎 JDK鞐� 韱淀暕霅橃棃鞙茧┌ 旮办〈 API毳� 韱淀暣 JAVA 鞚戩毄頂勲攴鸽灗鞐愳劀鞚� 鞐旍鞚� 靷毄頃� 靾� 鞛堧嫟. 鉁� 頄レ儊霅� 氤挫晥順胳稖鞛愳棎鞚橃〈頃橂姅氅旍唽霌滊ゼ靾橂彊鞙茧 鞙犾 甏€毽晿電� 旮办〈氇╇鞚� 鞚措煬頃� 氅旍唽霌滊ゼ鞝曧檿頃橁矊鞁濍硠頃橁碃順胳稖鞛愲ゼ鞎堨爼鞝侅溂搿� 瓴€靸夗晿電� 氚╈嫕鞙茧 氚旉炯雼�. 鉁� Lambda 響滍槃鞁� 氚� 臧€靸� 頇曥灔氅旍唽霌� JAVA8鞐愳劀雸堨棎霛勲姅旮半姤鞚€ Java 頂勲攴鸽灅氚� 鞏胳柎氚� 頂岆灚韽检棎甑槃霅� 霝岆嫟響滍槃鞁� 氚� 歆€鞗� 旮半姤鞚措嫟. JAVA8 鞚� 欤检殧旮半姤

27. Java8鞚€ Lambda 響滍槃鞁濎潉氚涭晞霌れ澊氅挫劀 Functional Programming 韸轨鞚� 臧栰稊瓴� 霅橃柎 OOP + FP 鞚� 氅€韹� 韺煬雼れ瀯鞏胳柎(Multi paradigm language)臧€ 霅愲嫟. Functional Programming(頃垬順� 頂勲攴鸽灅氚�)鞚措瀫? 頃垬順� 頂勲攴鸽灅氚嶌潃鞛愲 觳橂Μ毳� 靾橅暀鞝� 頃垬鞚� 瓿勳偘鞙茧 旆笁頃橁碃靸來儨鞕€ 臧€氤€ 雿办澊韯半ゼ氅€毽晿電� 頂勲攴鸽灅氚� 韺煬雼れ瀯鞚� 頃橂倶鞚措嫟. 氇呺牴順� 頂勲攴鸽灅氚嶌棎靹滊姅靸來儨毳� 氚旉靖電� 瓴冹潉臧曥“頃橂姅瓴冴臣電� 雼Μ, 頃垬順� 頂勲攴鸽灅氚嶌潃頃垬鞚� 鞚戩毄鞚� 臧曥“頃滊嫟. 靾橅暀鞝� 頃垬鞕€ 氇呺牴順� 頂勲攴鸽灅氚嶌棎靹� 靷毄霅橂姅頃垬電� 彀澊臧€ 鞛堧姅雿�, 氇呺牴順曥潣頃垬電� 頂勲攴鸽灗鞚� 靸來儨鞚� 臧� 鞚� 氚旉縺靾� 鞛堧姅攵€鞛戩毄鞚� 靸濌父靾� 鞛堧嫟. 鞚� 霑岆鞐� 氇呺牴順� 頃垬電� 彀胳“ 韴獏靹膘澊鞐嗞碃, 臧欖潃旖旊摐霛茧弰鞁ろ枆霅橂姅頂勲攴鸽灗鞚� 靸來儨鞐� 霐半澕雼るジ瓴瓣臣臧掛潉雮� 靾� 鞛堧嫟. 氚橂寑搿� 頃垬順� 旖旊摐鞐愳劀電� 頃垬鞚� 於滊牓臧掛潃攴� 頃垬鞐� 鞛呺牓霅� 鞚胳垬鞐愲 鞚橃〈頃橂瘈搿� 鞚胳垬 x鞐� 臧欖潃臧掛潉雱ｊ碃頃垬 f毳� 順胳稖頃橂┐ 頃儊 f(x)霛茧姅瓴瓣臣臧€ 雮橃槰雼�. 攵€鞛戩毄鞚� 鞝� 瓯绊晿氅� 頂勲攴鸽灗鞚� 霃欖瀾鞚� 鞚错暣頃橁碃鞓堨浮頃橁赴臧€ 頉敩靿疥矊霅滊嫟. 鞚搓矁鞚� 頃垬順� 頂勲攴鸽灅氚嶌溂搿� 臧滊皽頃橂牑電� 頃� 鞁� 霃欔赴欷� 頃橂倶鞚措嫟.

28. 鉁� 氇呺牴順� 鞏胳柎 : a霛茧姅氤€靾橃棎 1鞚� 雼挫晞霛�. (雽€鞛�) 鉁� 頃垬順� 鞏胳柎 : a毳� 1搿� 鞝曥潣頃滊嫟. a = 1

29. Lambda Expression 霝岆嫟鞁濎潃氅旍劀霌滌檧鞙犾偓順曥嫕毵り皽氤€靾橃潣氇╇瓿� 鞚� 毵り皽氤€靾橂 響滍槃霅� 氤鸽(鞁濎澊雮� 旖旊摐敫旊)鞚� 鞝滉车 A lambda expression is like a method : it provides a list of formal parameters and a body - an expression or block - expressed in terms of those parameters. - jsr335, /spec/B.html

30. Lambda Syntax (鞚胳瀽氇╇ ) - { 甑 } ( int x, int y ) - { return x + y; } (int x, int y ) - x + y ( ) - 鈥淗ello, World! 鈥� ( x, y ) - x + y x - x + 1

31. public void adder ( int x, int y ) { return x + y; } ( int x, int y ) - { return x + y; } ( x, y ) - x + y;

32. // Java8 鞚挫爠 Collections.sort(strings, new ComparatorString() { @Override public int compare(String s1, String s2) { return s1.compareTo(s2); } }); // Java8 Collections.sort(strings, (s1, s2) - s1.compareTo(s2));

33. 鈬� Functional Interface 鈥� 雼� 頃橂倶鞚� 於旍儊氅旍唽霌滊ゼ臧栯姅雼�. 鈥� 霝岆嫟響滍槃鞙茧 靷毄頃橁赴鞙勴暣 @FunctionalInterface 欤检劃(annotation)鞚� 攵欖澕靾� 鞛堧嫟. (鞚� 氚╈嫕鞚� 臧曤牓於旍矞霅�!) ? adder = ( int x, int y ) - x + y Lambda鞚� 韮€鞛呾潃?

34. @FunctionalInterface public interface IAddableT { // To add two objects public T add(T t1, T t2); } IAddableString stringAdder = (String s1, String s2) - s1 + s2; IAddableInteger intAdder = (i1, i2) - i1 + i2; public void addStrings(String s1, String s2) { System.out.println(stringAdder.add(s1, s2)); } public void addIntegers(Integer i1, Integer i2) { System.out.println(intAdder.add(i1, i2)); } 鉁� 鞚疙劙韼橃澊鞀� 鞝曥潣鉁� 霝岆嫟響滍槃鞁濎潉鞚挫毄頃橃棳 Functional Interface 甑槃 IAddable鞚� generic type 鞚疙劙韼橃澊鞀れ澊旮� 霑岆鞐� 靹滊 雼るジ韮€鞛呾溂搿� 甑槃鞚� 臧€電ロ晿雼�. 鉁� 鞝曥潣霅� 瓴冹潉靷毄

35. Java鞐愳劀 Lambda 響滍槃鞁濎潉靷毄頃橂姅氇╈爜氤€靾橂ゼ歆侅爲鞝勲嫭頃橃棳攴� 臧掛潉氤€瓴巾暔鞙茧鞃� 頋愲鞚� 觳橂Μ頃橃 鞎婈碃, 頄夓渼鞛愳泊 (Behavior Parameter)毳� 鞝勲嫭頃溂搿滌崹頃垬順� 頂勲攴鸽灗鞚� 歆€頄ロ晿電� 氚旊ゼ鞏魂赴鞙� 頃�. 旮办〈鞐� 鞚措 鞚惦獏韥措灅鞀�(Anonymous Class)毳� 韱淀暣頃搓舶頃� 靾橂弰鞛堨棃雿� 氍胳牅歆€ 毵�, Lambda鞁濎潉靷毄頃溂搿滌崹旖旊摐毳� 膦€ 雿� 旯旊仈頃橁碃臧€霃呾劚鞚� 雴掛澕靾� 鞛堧嫟. 歃�, 鈥淛ava鞐愳劀 Lambda 響滍槃鞁濎潃於旍儊氅旍唽霌滉皜頃橂倶毵� 鞛堧姅鞚疙劙韼橃澊鞀るゼ鞚惦獏韥措灅鞀� 雽€鞁� 甑槃頃� 靾� 鞛堦矊頃挫＜電� 氚╇矔鈥濎澊霛缄碃頃� 靾� 鞛堧嫟.

36. Stream API Java鞐愳劀臧€鞛� 毵庫澊靷毄霅橂姅 Collection鞚� 韺岇澊頂勲澕鞚措嫕順曧儨搿� 雼る０靾� 鞛堦矊頃挫＜電� Java8鞚� 靸堧鞖� API. Stream鞚� 韸轨 鉁� No Storage - 雿办澊韯� 氤搓磤鞚� 鞙勴暣氤勲弰鞚� 瓿店皠鞚� 毵堧牗頃橃 鞎婈碃鉁� Immutable - 旮半掣鞝侅溂搿滊姅鞗愲掣鞚� 臁办瀾頃橃 鞎婌溂氅� 鉁� Laziness - 斓滌鞝侅澑瓴瓣臣毳� 鞏混潉霑� 頃勳殧頃� 霃欖瀾毵岇潉靾橅枆頃橁碃鉁� Possibly unbounded - 臧掛潉氍错暅頌� 臧€歆� 靾橂弰鞛堨溂氅� 鉁� Consumable - 1須岇劚鞚措嫟. 歃�, 鞀ろ姼毽检潃臧� 鞗愳唽霌れ潉雼� 頃滊矆毵� 氚╇頃滊嫟.

37. 霌彪霅� 靸來拡欷戩棎順勳灛韺愲Г 欷戩澊瓿�, 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�?

38. public class Product { private int id; private boolean usable; private String category; private int price; getter / setter .. } 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�?

39. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void setProduct() { Product p1 = new Product(1, true, fashion, 50000); Product p2 = new Product(2, true, fashion, 38000); Product p3 = new Product(3, true, it, 250000); Product p4 = new Product(4, true, it, 85000); Product p5 = new Product(5, true, it, 99000); Product p6 = new Product(6, true, it, 75000); Product p7 = new Product(7, true, furniture, 350000); Product p8 = new Product(8, false, furniture, 210000); Product p9 = new Product(9, false, furniture, 58000); Product p10 = new Product(10, false, it, 120000); products.add(p1); products.add(p2); : }

40. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterBeforeJava8() { int count = 0; for(Product pd : products) { if(pd.isUsable() pd.getPrice() = 100000) { count++; } } System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡氇╇鞐愳劀臧滊硠靸來拡鞚� 甑暣靹�

41. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterBeforeJava8() { int count = 0; for(Product pd : products) { if(pd.isUsable() pd.getPrice() = 100000) { count++; } } System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡氇╇鞐愳劀臧滊硠靸來拡鞚� 甑暣靹� 順勳灛韺愲Г 欷戩澊瓿�

42. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterBeforeJava8() { int count = 0; for(Product pd : products) { if(pd.isUsable() pd.getPrice() = 100000) { count++; } } System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡氇╇鞐愳劀臧滊硠靸來拡鞚� 甑暣靹� 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿霛茧┐

43. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterBeforeJava8() { int count = 0; for(Product pd : products) { if(pd.isUsable() pd.getPrice() = 100000) { count++; } } System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡氇╇鞐愳劀臧滊硠靸來拡鞚� 甑暣靹� 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿霛茧┐ 臧滌垬毳� 1歃濌皜

44. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterJava8() { long count = products.stream() .filter(p - p.isUsable()) .filter(p - p.getPrice() = 100000) .count(); System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡欷戩棎靹�

45. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterJava8() { long count = products.stream() .filter(p - p.isUsable()) .filter(p - p.getPrice() = 100000) .count(); System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡欷戩棎靹� 韺愲Г 欷戩澊瓿�

46. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterJava8() { long count = products.stream() .filter(p - p.isUsable()) .filter(p - p.getPrice() = 100000) .count(); System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡欷戩棎靹� 韺愲Г 欷戩澊瓿� 鞁鞗� 鞚挫儊鞚� 靸來拡鞚�

47. 順勳灛韺愲Г 欷戩澊瓿� 鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬電�? public void filterJava8() { long count = products.stream() .filter(p - p.isUsable()) .filter(p - p.getPrice() = 100000) .count(); System.out.println(順勳灛韺愲Г 欷戩澊瓿� 臧€瓴╈澊鞁鞗� 鞚错晿鞚� 靸來拡鞚� 臧滌垬 : + count + 臧� ); } 靸來拡欷戩棎靹� 韺愲Г 欷戩澊瓿� 鞁鞗� 鞚挫儊鞚� 靸來拡鞚� 臧滌垬毳� 甑暔

48. Stream API : 3雼硠甑劚 products.stream().filter(p - p.isUsable()).count(); 鞀ろ姼毽� 靸濎劚欷戧皽鞐办偘鞀ろ姼毽� 氤€頇� 膦呺嫧鞐办偘鞀ろ姼毽� 靷毄

49. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void filter(ListInteger numbers) { numbers.stream() .filter(value - value % 3 == 0) .forEach(System.out::println); } 3鞚� 氚办垬毳� 於滊牓

50. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void filter(ListInteger numbers) { numbers.stream() .filter(value - value % 3 == 0) .forEach(System.out::println); } 3鞚� 氚办垬毳� 於滊牓欷戧皽鞐办偘 : Stream T filter ( T - boolean ) - 臧� 鞖旍唽毳� 頇曥澑頃挫劀臁瓣贝鞚� 韱店臣頃� 鞖旍唽毵岇溂搿� 靸� 鞀ろ姼毽� 靸濎劚 - 彀� / 瓯办鞚� 氚橅櫂頃橂姅臁瓣贝鞁濎潉鞚胳垬搿� 鞝勲嫭

51. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void filter(ListInteger numbers) { numbers.stream() .filter(value - value % 3 == 0) .forEach(System.out::println); } 3鞚� 氚办垬毳� 於滊牓斓滌 鞐办偘 : void forEach ( T - void ) - 臧� 鞖旍唽毳� 鞚胳垬搿� 鞝勲嫭霅� 頃垬鞐� 鞝勲嫭頃� 觳橂Μ - 斓滌鞐办偘鞚搓赴霑岆鞐� 鞚错泟鞀ろ姼毽检潉靷毄頃� 靾� 鞐嗢潓

52. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void filter(ListInteger numbers) { numbers.stream() .filter(value - value % 3 == 0) .forEach(System.out::println); } 3鞚� 氚办垬毳� 於滊牓氅旍唽霌� 彀胳“ : 霝岆嫟響滍槃鞁濎潣雼るジ順曧儨 class :: method 搿� 靷毄

53. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void map(ListInteger numbers) { int sum = numbers.stream() .mapToInt(value - value * 2) .sum(); System.out.println(Sum : + sum); } 毽姢韸胳潣氇摖臧掛潉 2氚� 頃� 頉� 頃╆硠甑晿旮�

54. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void map(ListInteger numbers) { int sum = numbers.stream() .mapToInt(value - value * 2) .sum(); System.out.println(Sum : + sum); } 毽姢韸胳潣氇摖臧掛潉 2氚� 頃� 頉� 頃╆硠甑晿旮� 欷戧皽鞐办偘 : Stream R map ( T - R ) - T 韮€鞛呾潣鞖旍唽毳� 1:1搿� R 韮€鞛呾潣鞖旍唽搿� 氤€頇� 頉� 鞀ろ姼毽� 靸濎劚 - 氤€頇橃潉觳橂Μ頃橂姅頃垬毳� 鞚胳垬搿� 鞝勲嫭

55. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void map(ListInteger numbers) { int sum = numbers.stream() .mapToInt(value - value * 2) .sum(); System.out.println(Sum : + sum); } 毽姢韸胳潣氇摖臧掛潉 2氚� 頃� 頉� 頃╆硠甑晿旮� 斓滌 鞐办偘 : sum(), average(), min(), max() - 頃╆硠 : [ int, long, double ] sum() - 韽夑窢 : OptionalDouble average() - 斓滌唽臧� : Optional[ Int, Long, Double ] min() - 斓滊寑臧� : Optional[ Int, Long, Double ] max()

56. ListInteger numbers = Arrays.asList(1,2,3,4,5,6,7,8,9,10); public static void statistics(ListInteger numbers) { IntSummaryStatistics stats = numbers.stream() .mapToInt(value - value * 2) .summaryStatistics(); System.out.println(Sum : + stats.getSum()); System.out.println(Average : + stats.getAverage()); System.out.println(Max Value : + stats.getMax()); System.out.println(Min Value : + stats.getMin()); } 毽姢韸胳潣氇摖臧掛潉 2氚� 頃� 頉� 頃╆硠, 韽夑窢, 斓滊寑 / 斓滌唽臧� 甑晿旮� 斓滌 鞐办偘 : summaryStatistics() - [ Int, Long, Double ] SummaryStatistics summaryStatstics() - 頃╆硠, 韽夑窢, 斓滌唽臧�, 斓滊寑臧�, 臧滌垬鞐� 雽€頃� 鞖旍暯韱店硠

57. // 鞓奠厴韮€鞛呺硠靷毄欷� 鞓奠厴氚橅櫂 : JAVA8 鞚挫爠鈥� private ListOption getUsableOptionsByType(OptionType type) {鈥� return select(this.options, having(on(Option.class).isUsable(), equalTo(true)).and( having(on(Option.class).getOptionType(), equalTo(type)))); } // 鞓奠厴韮€鞛呺硠靷毄欷� 鞓奠厴氚橅櫂 : JAVA8鈥� private ListOption getUsableOptionsByType(OptionType type) {鈥� return options.stream() .filter(o - o.isUsable()) .filter(o - type == o.getOptionType()) .collect(Collectors.toList()); } LambdaJ

58. LambdaJ /** * 斓滌唽鞓奠厴臧€ 臁绊殞 * LambdaJ - Lambda * @return 斓滌唽鞓奠厴臧€ */ public long getLowestOptionPrice() { // Java8 鞚挫爠 : LambdaJ 靷毄 ListOptionCombination activeOptionCombinations = select(getOptionCombinations(), having(on(OptionCombination.class).isUsable(), equalTo(true))); return min(activeOptionCombinations, on(OptionCombination.class).getPrice()); }

59. Lambda /** * 斓滌唽鞓奠厴臧€ 臁绊殞 * LambdaJ - Lambda * @return 斓滌唽鞓奠厴臧€ */ public long getLowestOptionPrice() { // Java8 return getOptionCombinations().stream() .filter(s - s.isUsable()) .mapToLong(OptionCombination::getPrice) .min() .getAsLong(); }

60. Lambda 響滍槃鞁濎潣鞛レ爯鉃� OOP 鞏胳柎鞚� Java鞐愳劀頃垬順� 旖旊摐毳� 鞛戩劚頃� 靾� 鞛堦矊頃挫雼�. 鉃� 霝岆嫟響滍槃鞁濎潉鞚挫毄頃溂搿滌崹臧勱舶頃橁碃氇呿檿頃� 旖旊摐搿� 攴� 鞚橂弰毳� 響滍槃頃� 靾� 鞛堧嫟. 鉃� Collection filtering, Iteration, Extraction 霌膘棎靹� 雴€霛检毚旖旊摐靸濎偘靹膘潉氤挫澑雼�.

61. One more thing鈥�

62. Lambda鞕€ Closure鞚� 彀澊 - Closure : 鞛愳嫚鞚� 鞝曥潣霅� 鞓侅棴鞚� 氤€靾橂ゼ鞐愳泴鞁戈碃(close over) 鞛堧姅瓴�. 霕愲姅, 鞛愳嫚鞚� 鞝曥潣霅� 鞓侅棴鞚� 氤€靾橃棎鞝戧芳頃� 靾� 鞛堧姅瓴�. Closure毳� 靷毄頃橁赴鞙勴暣靹� Lambda臧€ 靷毄霅滊嫟. - Lambda : 鞚惦獏頃垬 * Lambda電� 霝岆嫟響滍槃鞁� 霕愲姅霝岆嫟頃垬, 攴鸽Μ瓿� 鞚措鞐嗠姅頃垬(anonymous function)霛缄碃攵堧Μ鞖半┌ 攴� 靹膘鞚€ 鈥滍暔靾� 臧濎泊鞕€ 霃欖澕頃橂嫟鈥濌碃頃� 靾� 鞛堧嫟.

63. 臧愳偓顷╇媹雼�.

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