July 2016
Beginner to intermediate
776 pages
17h 26m
Korean
Content preview from 프로그래밍 스칼라: 실용적인 스칼라 활용법을 익히는 가장 확실한 실전 바이블 (2.11.x 버전 기반)
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287
6
장
스칼라 함수형 프로그래밍
scala
>
val inverse
:
PartialFunction
[
Double
,
Double
]
=
{
|
case d if d
!
=
0
.
0
=
>
1
.
0
/
d
|
}
inverse
:
PartialFunction
[
Double
,
Double
]
=
<
function1
>
scala
>
inverse
(
1
.
0
)
res128
:
Double
=
1
.
0
scala
>
inverse
(
2
.
0
)
res129
:
Double
=
0
.
5
scala
>
inverse
(
0
.
0
)
scala
.
MatchError
:
0
.
0
(
of class java
.
lang
.
Double
)
at scala
.
PartialFunction
$$
anon
$
1
.
apply
(
PartialFunction
.
scala
:
248
)
at scala
.
PartialFunction
$$
anon
$
1
.
apply
(
PartialFunction
.
scala
:
246
)
...
이는 그렇게 강건한 ‘역수’ 함수는 아니다. 왜냐하면
0
은 아니지만 매우 작은
d
의 경우
1
/
d
의 값
이 잘못될 수 있기 때문이다! 물론 진짜 핵심은
Double
의 경우
0
.
0
이 아닌 경우에만 역수가 존
재한다는 사실이다.
NOTE
_
부분 적용 함수는 함수의 인자 목록을 일부 적용하지만, 전부 적용(또는 제공)하지 않은 식을 말한
다. 이 식은 나머지 인자 목록을 취하는 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.