Herker
0
I want to extract all digits within different scopes.
1st scope: $ $
2nd scope: # #
Extract all digits within the 1st scope
$1-2$
Wished result
1, 2
$1#4#-2$
Wished result
1, 2
Extract all digits within the 2nd scope
$1-2#4-9-6#3-4$
Wished result
4, 9, 6
Note The - is there to separate each digit and the number of digits in each scope may differ from time to time
My current Regex: (^[$])([\d]+)(|-\d+)*(|#[\d]+((|-\d+)*)#)([$]+)($)
Any help is appreciated!
For scope-1 matches you can use this regex:
(?:\$|(?!^)\G(?:#[^#]*#)?-)\K\d+(?=[-\d#]*\$)
# without \K for Java
(?:\$|(?!^)\G(?:#[^#]*#)?-)(\d+)(?=[-\d#]*\$)
For scope-2 matches you can use this regex:
(?:#|(?!^)\G(?:\$[^$]*\$)?-)\K\d+(?=[\d$-]*#)
# without \K for Java
(?:#|(?!^)\G(?:\$[^$]*\$)?-)(\d+)(?=[-\d$]*#)
RegEx Breakup:
\G asserts position at the end of the previous match or the start of the string for the first match. Thus (?!^)\G matches position at the end of previous match\K: Reset matched info(?=[\d$-]*# is lookahead to assert that we have presence of # after matching 0 or more digits/$/-(?=[\d#-]*\$ is lookahead to assert that we have presence of $ after matching 0 or more digits/#/-