For instance, I am looking to extract the numbers that do not have 'the', 'abc', or 'he' before them;
the89 (no match)
thisis90 (match 90)
iknow89999 (match 89999)
getthe984754 (no match)
abc58934(no match)
he759394 (no match)
I attempted to use this pattern (?<!(the|abc|he))[0-9]+, but it did not work as expected.
If you want to search using a regex pattern that includes negative lookbehind, you can try the following:
(?<!t?he|xyz|\d)\d+
Check out this RegEx Demo for more information
Here are the details of the Regex pattern:
(?<!: Start of a negative lookbehind that will fail if matched with:
t?he: Either "the" or "he"|: ORxyz: Exact match with "xyz"|: OR\d: Any digit): End of the negative lookbehind condition\d+: Match one or more digitsIf you want to extract numbers preceded by a whitespace, you can utilize the concept of positive lookbehind
/(?<=\s)\d+/g
const data = [
"the89",
"this is 90",
"i like the60",
"i know 89999",
"get the984754",
];
const matches = data.map((s) => s.match(/(?<=\s)\d+/g));
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