^start of line
\[the literal [ (9110 / 1338 / 5B16)
Group 1(-?\d{1,4}(?:\.\d{1,4})?) -?optionally matches the literal - (4510 / 558 / 2D16)
\d{1,4}a digit, repeated between 1 and 4 times
Non-Capturing Group(?:\.\d{1,4})? ?repeats the group contents below at most once:
\.the literal . (4610 / 568 / 2E16)
\d{1,4}a digit, repeated between 1 and 4 times
the literal (3210 / 408 / 2016)
\.the literal . (4610 / 568 / 2E16)
\.the literal . (4610 / 568 / 2E16)
the literal (3210 / 408 / 2016)
Group 2(-?\d{1,4}(?:\.\d{1,4})?) -?optionally matches the literal - (4510 / 558 / 2D16)
\d{1,4}a digit, repeated between 1 and 4 times
Non-Capturing Group(?:\.\d{1,4})? ?repeats the group contents below at most once:
\.the literal . (4610 / 568 / 2E16)
\d{1,4}a digit, repeated between 1 and 4 times
\)the literal ) (4110 / 518 / 2916)
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string