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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203
4
장
패턴 매칭
WHERE state IN
(
IL
,
CA
,
VA
)
WHERE state
=
IL
WHERE name
=
Buck Trends
WHERE age
>
29
4.8
정규 표현식과 일치시키기
정규 표현식
regular
expression
(줄여서
regex
)은 문자열에서 정해진 구조를 가진 데이터를 뽑아낼
때 편리한 도구다.
스칼라는 자바의 정규 표현식
1
을 감싸서 사용한다. 다음 예제를 보라.
//
src
/
main
/
scala
/
progscala2
/
patternmatching
/
match
-
regex
.
sc
val BookExtractorRE
=
"""
Book
:
title
=
([^,]+),\
s
+
author
=
(.+)""".
r
//
➊
val MagazineExtractorRE
=
"""
Magazine
:
title
=
([^,]+),\
s
+
issue
=
(.+)""".
r
val catalog
=
Seq
(
"
Book
:
title
=
Programming Scala Second Edition
,
author
=
Dean Wampler
",
"
Magazine
:
title
=
The New Yorker
,
issue
=
January 2014
",
"
Unknown
:
text
=
Who put this here
??"
)
for
(
item
<
-
catalog
)
{
item match
{
case BookExtractorRE ...
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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.