Regular Expressions 101

Pro

^start of line

Negated Character Class[^#\r\n]+?

+?matches at least one character outside the set below:

#the literal # (35₁₀ / 43₈ / 23₁₆)

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Positive Lookahead(?=[^\S\r\n]*#)

Negated Character Class[^\S\r\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

#the literal # (35₁₀ / 43₈ / 23₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

^[^#\r\n]+?(?=[^\S\r\n]*#)

New

These are words before hashtag #work/abc/xyz/123
These are words before hashtag  #work/abc/xyz/123
These are words before hashtag   #work/abc/xyz/123