위치와 이스케이핑

위치와 이스케이핑

Page 3 - 앵커를 사용해 보자!

• Source : who is who
• Case 1
  • Regular Expression : ^who
  • First match: who is who
  • All matches : who is who
• Case 2
  • Regular Expression : who$
  • First match: who is who
  • All matches : who is who
• ^(캐럿)이 등장하면 캐럿 뒤의 문자가 소스 상에서 시작 위치에 있을 경우 사용됨
• $(달러)는 소스의 끝에 위치하는 대상을 지목할 때 사용함
• Character ^ matches the beginning of the line(case 1) while dollar sign$ the end of the line(case 2)

 

Page 4 - 특수한 문자가 포함되어 있다면? 이스케이프 문자를 사용해 보자!!!!

• Source : $12$ \-\ $25$
• Case 1
  • Regular Expression : ^$
  • First match: $12$ \-\ $25$
  • All matches : $12$ \-\ $25$
• Case 2
  • Regular Expression : \$
  • First match: $12$ \-\ $25$
  • All matches : $12$ \-\ $25$
• Case 3
  • Regular Expression : ^\$
  • First match: $12$ \-\ $25$
  • All matches : $12$ \-\ $25$
• Case 4
  • Regular Expression : \$$
  • First match: $12$ \-\ $25$
  • All matches : $12$ \-\ $25$
• Case 5
  • Regular Expression : \\
  • First match: $12$ \-\ $25$
  • All matches : $12$ \-\ $25$
• If literal value of a special character is required, it must be escaped with a backslash \