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1 | https://ja.wikipedia.org/wiki/%E3%82%A2%E3%82%AF%E3%82%BB%E3%82%B5 | ã¢ã¯ã»ãµ | ã¡ãœãã
(
method
) ãããã¯
ã¡ã³ããŒé¢æ°
(-ãããã,
member function
) ãšã¯
ãªããžã§ã¯ãæåããã°ã©ãã³ã°
èšèª
ã«ãããŠããã
ã¯ã©ã¹
ãŸãã¯
ãªããžã§ã¯ã
ã«æå±ãã
ãµãã«ãŒãã³
ãæãã
æŠèŠ
[
ç·šé
]
ãªããžã§ã¯ãæåããã°ã©ãã³ã°ã«ãããã¡ãœãããšããçšèªã¯å
ã
Smalltalk
ã«ãã£ãŠ
Simula
ã®
ã¡ã³ããŒããã·ãŒãžã£ãŒ
(
member procedure
) ã
ã¡ãã»ãŒãž
ãš
ã¡ãœãã
ã«åããããã«å°å
¥ãããã
C++
ã§ã¯
ã¡ã³ããŒé¢æ°
ãšåŒã°ããããããã¯Simulaã®ã¡ã³ããŒããã·ãŒãžã£ãŒã
Cèšèª
ã«æµçšããããšã«ç±æ¥ããŠããã
Java
ã®ãããªèšèªã
ãã€ã¯ããœãã
[
1
]
ãªã©ã®äŒæ¥ãã¡ãœãããšããçšèªã䜿ã£ãŠããã®ã¯ã
å
ã
C++ãããSmalltalkã®åœ±é¿ãåããŠããããã§ãã
[
èŠåºå
ž
]
ã
è¿å¹Ž
[
ãã€?
]
ã§ã¯èšèªèšèšãOSéçºçã§çŽæ¥Smalltalkã®åœ±é¿ãåããŠããªãå Žåã§ããJavaããã€ã¯ããœããçã®åœ±é¿ã«ããã¡ã³ããŒããã·ãŒãžã£ãŒãã¡ã³ããŒé¢æ°ã«åœãããã®ãã¡ãœãããšåŒã¶ããšãäžè¬åããŠããã
SmalltalkãSmalltalkã®ç¹è²ãè²æ¿ãåãç¶ãã
Objective-C
ã§ã¯ãã¡ãã»ãŒãžãšã¡ãœãããæç¢ºã«äœ¿ãåããŠããã
[
2
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ã¡ãã»ãŒãžãšã¡ãœãããåãããŠããèšèªã§ã¯1åã®ã¡ãœããã«å¯Ÿãã»ã¬ã¯ã¿ãŒãç°ãªãè€æ°ã®ã¡ãã»ãŒãžãéãããšãã§ããããã®ããã¡ã³ããŒé¢æ°åã®èšèªãšéãã¡ãã»ãŒãžãšã¡ãœããã®åé¢ã匷ãæèããŠããå¿
èŠãããã
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§ãããåŒã³åºãããããããšãã§ããªãããã®æ©èœã¯éåžž
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ã«è²¢ç®ããããŸãåŒã³åºãæã«æäœã®å¯Ÿè±¡ãšãªãã€ã³ã¹ã¿ã³ã¹ (ã¬ã·ãŒã) ã
this
ã
self
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äºçŽèª
ïŒããããã¯ã¡ãœããã«æž¡ããã
åŒæ°
ã«ãã£ãŠåç
§ããããšãã§ããã
C++
ã§ã¯ã¯ã©ã¹ã«å±ããªã颿°ã§ãã
倧å颿°
ïŒã°ããŒãã«é¢æ°ãããã¯ããªãŒé¢æ°ïŒãšå¯Ÿæ¯ãããããšãããã
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ãããããšããããå®éã«çºçããåäœïŒæ¯ãèãïŒãã¬ã·ãŒãã«äŸåãããšããç¹åŸŽãæã€ãããã
倿
æ§
ïŒããªã¢ãŒãã£ãºã ïŒãšåŒã¶ã
çµ±äžã¢ããªã³ã°èšèª
(UML) ã§ã¯ã¡ãœããã®ããšã
æäœ
(operation) ãšåŒã¶ã
ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããšã¯ã©ã¹ã¡ãœãã
[
ç·šé
]
ã€ã³ã¹ã¿ã³ã¹ã¡ãœãã
(
instance method
) ãšã¯
ã€ã³ã¹ã¿ã³ã¹
ã«å±ããã¡ãœããã®ããšã§ãããã€ã³ã¹ã¿ã³ã¹ã«å¯Ÿãã¡ãã»ãŒãžãéä¿¡ããäºã§å®è¡ããããã€ã³ã¹ã¿ã³ã¹å€æ°ã®æäœã«äœ¿ãããã€ã³ã¹ã¿ã³ã¹ã¡ãœããã¯ãªããžã§ã¯ãæåããã°ã©ãã³ã°ã®äžæ žããªãããã£ãšããã䜿ãããã
äžæ¹ã
ã¯ã©ã¹ã¡ãœãã
(
class method
) ãšã¯
ã¯ã©ã¹
ã«å±ããã¡ãœããã®ããšã§ãããã¯ã©ã¹ã«å¯Ÿãã¡ãã»ãŒãžãéä¿¡ããäºã§å®è¡ããããã¯ã©ã¹å€æ°ã®æäœããªããžã§ã¯ãã®çæãªã©ã«äœ¿ããããå€ãã®ãªããžã§ã¯ãæåèšèªã¯
ã¡ã¿ã¯ã©ã¹
ããµããŒãããŠãããã¯ã©ã¹ãªããžã§ã¯ãã®æäœææ®µãšãªãã
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ã
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ãšãã£ããªããžã§ã¯ãæåèšèªã§ã¯
éçã¡ã³ããŒé¢æ°
ãããã¯
éçã¡ãœãã
(
static method
) ãšãã°ãããã®æ¯ãèãã¯ã¯ã©ã¹å€æ°ã®æäœãèš±å¯ãããç¹ãé€ãéãªããžã§ã¯ãæåèšèªã«ããã
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ãšå€ãããªãã
ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããšã¯ã©ã¹ã¡ãœããã®äŸ
[
ç·šé
]
Smalltalkã«ããäŸ
[
ç·šé
]
Smalltalk
ã«ããã€ã³ã¹ã¿ã³ã¹ã¡ãœãããšã¯ã©ã¹ã¡ãœããã®äŸã瀺ãã
Object
subclass:
#MethodSample
instanceVariableNames:
'name'
"ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã«æãããã€ã³ã¹ã¿ã³ã¹å€æ°"
classVariableNames:
''
"ã¯ã©ã¹ãªããžã§ã¯ããšã¯ã©ã¹ãªããžã§ã¯ãçŽå±ã®ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã®éã§å
±æããã¯ã©ã¹å€æ°"
poolDictionaries:
''
"ã¯ã©ã¹ãªããžã§ã¯ããšã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã®éã§å
±æããããŒã«å€æ°"
category:
'Example'
.
"ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã®ã€ã³ã¹ã¿ã³ã¹å€æ°ãæäœããã¡ãœãã(ã€ã³ã¹ã¿ã³ã¹ã¡ãœãã)"
MethodSample
methodsFor:
'accessing'
!
givenName
^
name
.
!
givenName:
aString
name
:=
aString
.
!!
"ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ããšã¯ã©ã¹ãªããžã§ã¯ããæäœããã¡ãœãã(ã€ã³ã¹ã¿ã³ã¹ã¡ãœãã)"
MethodSample
methodsFor:
'inter-accessing'
!
name
^
self
givenName,
' '
,
self
class
familyName
.
!!
MethodSample
class
instanceVariableNames:
'name'
.
"ã¯ã©ã¹ãªããžã§ã¯ãã«æãããã€ã³ã¹ã¿ã³ã¹å€æ°"
"ã¯ã©ã¹ãªããžã§ã¯ãã®ã€ã³ã¹ã¿ã³ã¹å€æ°ãæäœããã¡ãœãã(ã¯ã©ã¹ã¡ãœãã)"
MethodSample
class
methodsFor:
'accessing'
!
familyName
^
name
.
!
familyName:
aString
name
:=
aString
.
!!
MethodSample
class
methodsFor:
'instance creation'
!
withGivenName:
aString
^
self
new
givenName:
aString
;
yourself
.
!!
ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããå®è¡ããã«ã¯ããŸã
ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ã
ãçæããªããã°ãªããªã:
|
objectA objectB
|
objectA
:=
MethodSample
withGivenName:
'John'
.
objectB
:=
MethodSample
withGivenName:
'Joe'
.
äžã®äŸã§ã¯
#withGivenName:
ã«ããäºã€ã®ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ããçæã倿°
objectA
ãš
objectB
ã«ä»£å
¥ããŠããããã®æç¹ã§ã
objectA
ãš
objectB
ã®ã€ã³ã¹ã¿ã³ã¹å€æ°
name
ã«ã¯ãããã "John" ãš "Joe" ã代å
¥ãããŠããã
ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããå®è¡ããã«ã¯æ¬¡ã®ããã«èšè¿°ãã:
objectA
givenName
.
"'John' ãè¿ã"
objectB
givenName
.
"'Joe' ãè¿ã"
äžã®äŸã§ã¯
objectA
ãš
objectB
ããããã®ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã«å¯Ÿã
#givenName
ã¡ãã»ãŒãžãéãã€ã³ã¹ã¿ã³ã¹ã¡ãœãããå®è¡ããŠãããããããã®ã¡ãœããã®è¿ãå€ãç°ãªãããšãããåãã¯ã©ã¹ãªããžã§ã¯ãã«å±ããã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã§ãã€ã³ã¹ã¿ã³ã¹å€æ°ãæã€å€ã¯ãã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãæ¯ã«ç°ãªãããšããããã
äžæ¹ãã¯ã©ã¹ã¡ãœãããå®è¡ããã«ã¯ãã¯ã©ã¹ãªããžã§ã¯ãã«çŽæ¥å±ããŠãããããã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã®ä»£ããã«ã¯ã©ã¹ãªããžã§ã¯ãã«å¯ŸããŠã¡ãã»ãŒãžãéãã
ã¯ã©ã¹ã¡ãœãããå®è¡ããã«ã¯æ¬¡ã®ããã«èšè¿°ãã:
type
:=
MethodSample
type
familyName:
'Hillton'
.
type
familyName
.
"'Hillton' ãè¿ã"
.
äžã®äŸã§ã¯
type
ã«ã¯ã©ã¹ãªããžã§ã¯ã
MethodSample
ã代å
¥ããŠã
#familyName
ãš
#familyName:
ã¡ãã»ãŒãžãéãã¯ã©ã¹ã¡ãœãããå®è¡ããŠããã
ã¯ã©ã¹ãªããžã§ã¯ãã®ã€ã³ã¹ã¿ã³ã¹å€æ°
name
ã¯ãã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã®ã€ã³ã¹ã¿ã³ã¹å€æ°ãšç°ãªã
MethodSample
ã«å±ããå
šãŠã®ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã§å
±æãããã
ã¯ã©ã¹ãªããžã§ã¯ãã®ã€ã³ã¹ã¿ã³ã¹å€æ°ãå
±æãããäŸã瀺ã:
|
type objectA objectB
|
type
:=
MethodSample
objectA
:=
type
withGivenName:
'John'
.
objectB
:=
type
withGivenName:
'Joe'
.
"#nameã¯ã¯ã©ã¹ãªããžã§ã¯ãã«#familyNameãéã£ãŠãããããç°ãªãã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã§ã'Hillton'ãå
±æãããŠããã"
type
familyName:
'Hillton'
.
objectA
name
.
"'John Hillton'ãè¿ã"
objectB
name
.
"'Joe Hillton'ãè¿ã"
ã¯ã©ã¹ã¡ãœããã¯ã倿°ã«ä»£å
¥ããçŽæ¥ã¯ã©ã¹åãæå®ããŠåŒã³åºãããšãå€ããç¹ã«ã¯ã©ã¹ããªããžã§ã¯ãã§ã¯ãªãèšèªã«ãããŠã¯ãçŽæ¥ã¯ã©ã¹åãæå®ããæžãæ¹ããã§ããªãã
çŽæ¥ã¯ã©ã¹åãæå®ããã¯ã©ã¹ã¡ãœããã®åŒã³åºãã¯æ¬¡ã®ããã«èšè¿°ãã:
MethodSample
familyName:
'Hillton'
.
MethodSample
familyName
.
"'Hillton' ãè¿ã"
.
ãªãã
MethodSample
ã®ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãçæãããšãã«äœ¿çšãã
new
ãã¯ã©ã¹ã¡ãœããã§ããã
äžè¬çã«ã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ããçæããå Žåã«ã¯
new
ãšããç¹å¥ãªæŒç®åãçšããèšèªãå€ããããããSmalltalkã®åœ±é¿ã匷ãèšèªãRubyçããã€ãã®èšèªã§ã¯ã¯ã©ã¹ã¡ãœããã«ããã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ããçæãããã¯ã©ã¹ã¡ãœããã«ããã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ããçæããèšèªã®å Žåã
new
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new
ãå®è¡ãããšããå¥ã®ã¯ã©ã¹ãªããžã§ã¯ãã«å±ããã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ããè¿ãããã«ããããšãã§ãããC++ã®ããã«
new
ãæŒç®åã§ãããªãããã¯ã©ã¹ã¡ãœãã (éçã¡ã³ããŒé¢æ°) ãšããŠ
new
ãå®çŸ©ã§ããèšèªãããã
ã¯ã©ã¹ããªããžã§ã¯ãã«ãªã£ãŠããèšèªã®å Žåãã€ã³ã¹ã¿ã³ã¹ãã¯ã©ã¹ãåããªããžã§ã¯ããšããŠæ±ããããããã€ã³ã¹ã¿ã³ã¹ã¡ãœãããšã¯ã©ã¹ã¡ãœããã§ã¡ãã»ãŒãžã®éãæ¹ã«åºå¥ã¯ãªããã€ã³ã¹ã¿ã³ã¹ã¡ãœããã®ä»£ããã«ã¯ã©ã¹ã¡ãœãããåŒã³åºãããšããã¯ã©ã¹ã¡ãœããã®ä»£ããã«ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããåŒã³åºãããšãã§ãããã©ã¡ãã®ã¡ãœãããåŒã³åºããã¯ãã¡ãã»ãŒãžãéã£ã倿°ã«ã€ã³ã¹ã¿ã³ã¹ãšã¯ã©ã¹ã®ãã¡ãã©ã¡ãã®ãªããžã§ã¯ãã代å
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ã·ã°ããã£
(signature: ååãšåŒæ°) ãå®çŸ©ã§ãããSmalltalkãObjective-Cãªã©ã¡ãã»ãŒãžãååšããèšèªã§ã¯ã¡ãœããã®å€éå®çŸ©ãã§ããªãããäžèŠç¡çãªããã«èŠããããã¡ãœãããæå±ãããªããžã§ã¯ããã€ã³ã¹ã¿ã³ã¹ãšã¯ã©ã¹ã§ç°ãªããããåäžã®ã·ã°ããã£ã§ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããšã¯ã©ã¹ã¡ãœãããå®çŸ©ããããšãã§ããã
Javaã«ããäŸ
[
ç·šé
]
Java
ã§èšè¿°ããã€ã³ã¹ã¿ã³ã¹ã¡ãœãããšéçã¡ãœããïŒã¯ã©ã¹ã¡ãœããïŒã®äŸã瀺ããJava ã§ã¯
static
修食åãã€ããã¡ãœãããéçã¡ãœããã§ãããã€ããŠããªããã°ã€ã³ã¹ã¿ã³ã¹ã¡ãœããã§ããã
public
class
MethodSample
{
/** ã€ã³ã¹ã¿ã³ã¹ãã£ãŒã«ã */
private
String
name
;
/** ã¯ã©ã¹ãã£ãŒã«ã */
private
static
int
number
;
/** ã€ã³ã¹ã¿ã³ã¹ãçæããããã®ã³ã³ã¹ãã©ã¯ã¿ */
public
MethodSample
(
final
String
name
)
{
this
.
name
=
name
;
}
/** ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããgetter */
public
String
getName
()
{
return
this
.
name
;
}
/** éçã¡ãœãããgetter */
public
static
int
getNumber
()
{
return
MethodSample
.
number
;
}
/** éçã¡ãœãããsetter */
public
static
void
setNumber
(
final
int
number
)
{
MethodSample
.
number
=
number
;
}
}
Smalltalkåæ§ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããåŒã³åºãã«ã¯ããŸãã³ã³ã¹ãã©ã¯ã¿ãåŒã³åºããŠ
ã€ã³ã¹ã¿ã³ã¹
ãçæããªããã°ãªããªã:
MethodSample
objectA
=
new
MethodSample
(
"John"
);
MethodSample
objectB
=
new
MethodSample
(
"Joe"
);
äžèšã®äŸã¯ãSmalltalkã®äŸã«ãããã€ã³ã¹ã¿ã³ã¹ãªããžã§ã¯ãã®çæãšåæ§ã«åäœãããC++ã®è¡šèšãèžè¥²ããJavaã§ã¯ã
newæŒç®å
ã«ãã£ãŠã€ã³ã¹ã¿ã³ã¹ãçæããã
ã€ã³ã¹ã¿ã³ã¹ã¡ãœãããåŒã³åºãã«ã¯æ¬¡ã®ããã«èšè¿°ãã:
objectA
.
getName
();
// "John" ãè¿ã
objectB
.
getName
();
// "Joe" ãè¿ã
äžèšã®äŸã¯ãSmalltalkã®äŸã«ãããã€ã³ã¹ã¿ã³ã¹ã¡ãœããã®åŒã³åºããšåæ§ã«åäœããã
ã¯ã©ã¹ã¡ãœãããåŒã³åºãã«ã¯æ¬¡ã®ããã«èšè¿°ãã:
MethodSample
.
setNumber
(
100
);
MethodSample
.
getNumber
();
// 100 ãè¿ã
äžèšã®äŸã¯ãRubyã®äŸã«ãããçŽæ¥ã¯ã©ã¹åãæå®ããã¯ã©ã¹ã¡ãœããã®åŒã³åºããšåæ§ã«åäœããã
Javaã§ã¯
ã¡ã¿ã¯ã©ã¹
ãšããŠ
java.lang.Class
ã¯ã©ã¹ããµããŒãããã
java.lang.Object.getClass()
ã¡ãœããã«ãã
Class
åãªããžã§ã¯ããååŸã§ããããŸãã
ã¯ã©ã¹å.class
ãšããæ§æã§
Class
åãªããžã§ã¯ããååŸããããšãã§ãããããã«
ãªãã¬ã¯ã·ã§ã³
ã䜿ãããšã§ã
Class
åãªããžã§ã¯ãããã¡ãœãããåŒã³åºãããããã£ãŒã«ãã«ã¢ã¯ã»ã¹ãããããããšãã§ããã
.NET Framework
ã§ã¯ã¡ã¿ã¯ã©ã¹ãšããŠ
System.Type
ã¯ã©ã¹ããµããŒãããã
System.Object.GetType()
ã¡ãœããã«ãã
Type
åãªããžã§ã¯ããååŸã§ãããC#ã§ã¯
typeof
æŒç®åã«ããåã·ã³ãã«ãã
Type
åãªããžã§ã¯ããååŸããããšãã§ããããŸãããªãã¬ã¯ã·ã§ã³ããµããŒãããŠããã
C++ã¯ã¯ã©ã¹åãªããžã§ã¯ãããªãã¬ã¯ã·ã§ã³ããµããŒããããã¯ã©ã¹èªäœãäœããã®å€æ°ã«ä»£å
¥ãããããªããšã¯ã§ããªã
[
4
]
ã
ã¡ãã»ãŒãžéä¿¡ãšã¡ãœããåŒã³åºã
[
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Boehm, B. and Turner, R.,
Balancing Agility and Discipline: A Guide for the Perplexed,
Addison-Wesley, Boston. 2004.
ISBN 0321186125
Beck, Kent
.
Extreme Programming Explained: Embrace Change (first edition)
. Addison-Wesley, Boston. 1999.
ISBN 0201616416
é·ç¬åç§(ç£èš³)ãæ°žç°æž(èš³)ã飯å¡éº»çéŠ(èš³) ã
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Beck, Kent.
Extreme Programming Explained: Embrace Change Second Edition
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ISBN 0321278658
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ISBN 4894716852
Fowler, Martin
.
Is Design Dead?
.
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Extreme Programming Explained
æå, G. Succi and M. Marchesi, ed., Addison-Wesley, Boston. 2001,
ISBN 0201710404
.
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ISBN 4894715422
Riehle, Dirk.
A Comparison of the Value Systems of Adaptive Software Development and Extreme Programming: How Methodologies May Learn From Each Other
.
Extreme Programming Explained
æå, G. Succi and M. Marchesi, ed., Addison-Wesley, Boston. 2001,
ISBN 0201710404
.
ã第äºéš 第3ç« ASDãšXPã®äŸ¡å€äœç³»ãæ¯èŒãã : æ¹æ³è«ã¯ãäºãã«äœãåŠã³ãããããXPãšã¯ã¹ããªãŒã ã»ããã°ã©ãã³ã°æ€èšŒç·šÂ : XPã®åºç€ã»å¿çšã»çºå±ãèå¯ãã33ç¯ç²Ÿéžè«æéã ä»ã®æžèªæ
å ±ã¯ [3] ãåç
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Tomek, Ivan.
What I Learned Teaching XP
.
M. Stephens, D. Rosenberg.
Extreme Programming Refactored: The Case Against XP
. Apress L.P., Berkeley, California. 2003.
ISBN 1590590961
D. Rosenberg, M. Stephens.
Agile Development with ICONIX Process
. Apress L.P., Berkeley, California. 2005.
ISBN 1590594649
Beck, et. al.,
Manifesto for Agile Software Development
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McBreen, P.
Questioning Extreme Programming
. Addison-Wesley, Boston. 2003.
ISBN 0201844575
Larman, Craig and Basili, Victor R.
Iterative and Incremental Development:A Brief History
IEEE Computer, June 2003 (PDF)
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, John Wiley & Sons, NY: 1980.
Dominic Sweetman:
See MIPS Run
. Morgan Kaufmann Publishers, 1999.
ISBN 1-55860-410-3
John Waldron:
Introduction to RISC Assembly Language Programming
. Addison Wesley, 1998.
ISBN 0-201-39828-1
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