Someone explain to me regular expressions
, I don't quite understand what the following fragment means.
RETURN '^(1|B)[A-Z0-9]{6}\.1L[1-9]{1}$';
**(1|B)**[A-Z0-9]{6}\.1L[1-9]{1}**$**
EL 1|B what does it mean?
I understand that the following segment can contain from A to Z and from 0 to 9 up to a maximum of 6 digits, and I don't understand what the $ character is for either.
Let's see:
^
match from the beginning of the line(1|B)
match of the characters1
orB
and are also()
indicated by a capture group, which is used to promptly extract this content[A-Z0-9]{6}
alphanumeric character match of length 6\.
literal match of a.
1L
match string literal1L
[1-9]{1}
match a numeric character (without the 0)$
end of lineAn interactive demo and explanation: https://regex101.com/r/q0B9na/1