Regex for extracting the substring of a given type from a string
Can someone help me in finding the regular expression for extracting the substring "CT23123" from the string "Andy Joe:CT23123" . I need a regex for extracting anything that is after ':' and is followed by two alphabets (can be in caps or small case) and 5 digits.
尝试这个：
/:([a-zA-Z]{2}d{5})/
r = /
(?<=:) # match a colon in a positive lookbehind
[A-Z]{2} # match two letters
d{5} # match 5 digits
(?=D|z) # match a non-digit or the end of the string in a positive lookahead
/xi # extended/free-spacing mode (x) and case-indifferent (i)
"Andy Joe :CT23123"[r] #=> "CT23123"
"Andy Joe:CT23123a"[r] #=> "CT23123"
"Andy Joe:CT231234"[r] #=> nil
要么：
r = /
: # match a colon
([A-Z]{2}d{5}) # match two letters followed by 5 digits in capture group 1
(?:D|z) # match a non-digit or the end of the string in a non-capture group
/xi # extended/free-spacing mode (x) and case-indifferent (i)
"Andy Joe :CT23123"[r,1] #=> "CT23123"
"Andy Joe:CT23123a"[r,1] #=> "CT23123"
"Andy Joe:CT231234"[r,1] #=> nil
使用不区分大小写选项的另一个版本：
/:([a-z]{2}d{5})/i