I am using JavaScript and would like to match everything in a custom template language like this:
Begin10
Match THIS keyword and ANOTHER
End10
So I would like to find Begin10 using the 10 as variable to find End10 and match THIS and ANOTHER between them.
I've looked at capture groups. I assume this is the way to go, but I can't figure out how to compose the expression.
THIS and ANOTHER need to be targeted for syntax highlighting by my code.
You can use regex with captured group
var str = `Begin10
Match THIS keyword and ANOTHER1
End10
Begin20
Match THIS keyword and ANOTHER2
End20`;
console.log(
str.match(/\bBegin(\d+)[\s\S]*?\bEnd\1\b/g)
);var str = `Begin10
Match THIS keyword and ANOTHER1
End10
Begin20
Match THIS keyword and ANOTHER2
End20`;
var res = [],
regex = /\bBegin(\d+)\s+([\s\S]*?)\s+\bEnd\1\b/g,
match;
while (match = regex.exec(str)) {
res.push(match[2]);
}
console.log(res);
UPDATE :
If there is only THIS or ANOTHER between them then use
var str = `Begin10
THIS
End10
Begin20
ANOTHER
End20`;
var res = [],
regex = /\bBegin(\d+)\s+(THIS|ANOTHER)\s+\bEnd\1\b/g,
match;
while (match = regex.exec(str)) {
res.push(match[2]);
}
console.log(res);
THIS and ANOTHER instead. I don't wish to match the whole string
/\bBegin(\d+)\s+(THIS|ANOTHER)\s+\bEnd\1\b/gBegin(\d+) and match it with (End\1) but then I need to search between these strings and find THIS and ANOTHER only.
\nBegin(\d+)\s*\nMatch \b(\w+)\b keyword and \b(\w+)\b\s*\nEnd\1\n
\n will match a newline, and I am sure you don't want to get anything besides newline.\1 that's a variable for the first group to make sure it has the same value.\s* just to ignore some unnecessary whitespaces.
THIS and ANOTHER so I can highlight them as keywords. The answers here have already taken me halfway through