June 2018
Beginner to intermediate
184 pages
3h 30m
Korean
Content preview from 자바로 배우는 핵심 자료구조와 알고리즘: 기술 면접에 필요한 실용주의 자료구조와 알고리즘
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149
15
장
위키피디아 크롤링
이 장에서는 실습
11
의 해법을 제시하고 웹 인덱싱 알고리즘의 성능을 분석합니다. 그리고 간
단한 웹 크롤러를 만들어 봅니다.
15.1
레디스 기반의 인덱서
필자의 해법에서는 레디스에 두 종류의 구조를 저장합니다.
●
검색어마다
URLSet
객체가 있습니다. 이 객체는 검색어를 포함한
URL
들의 레디스
set
입니다.
●
URL
마다
TermCounter
객체가 있습니다. 이 객체는 검색어와 검색어 등장 횟수를 매핑하는 레디스
hash
입
니다.
이러한 데이터 타입에 관해서는 앞 장에서 다루었습니다. 레디스 자료구조에 관한 자세한 내용
은
http
://
thinkdast
.
com
/
redistypes
를 참고하세요.
JedisIndex
클래스에는 검색어를 인자로 받아 검색어의
URLSet
에 해당하는 레디스 키를 반
환하는 다음 메서드가 있습니다
(파일명:
JedisIndex.java
)
.
private String urlSetKey
(
String term
)
{
return
"
URLSet
:"
+
term
;
}
위키피디아 크롤링
CHAPTER
15
150
자바로 배우는 핵심 자료구조와 ...
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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.