I need to retrieve numbers from txt file which looks +/- like this:
[ Index 1 ]
1628 5704
32801 61605
71508 90612
1026061
I need to ignore Indexe's number.
[0-9]+ retrieve all numbers, index as well.
I tried something like this called negative lookahead (?![(Index 1)])([0-9]+). It ignores 1 indeed, but all of them... for instance 1628 becomes 628. Appreciate for help, I've always been weak in regex syntax :/
Use
\b(?<!Index )\d+
See proof.
Explanation
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\b the boundary between a word char (\w) and
something that is not a word char
--------------------------------------------------------------------------------
(?<! look behind to see if there is not:
--------------------------------------------------------------------------------
Index 'Index '
--------------------------------------------------------------------------------
) end of look-behind
--------------------------------------------------------------------------------
\d+ digits (0-9) (1 or more times (matching
the most amount possible))
This pattern matches only numbers. It's looking for a series or multiple digits at the start of the string or series or multiple digits at the end of a string.
^\d+|\d+$
https://regex101.com/r/ZNTxQ7/1
Another way is to look for a series of two or more digits in the string.
\d{2,}