Regular Expressions 101

Explanation

Pro

^start of line

.+?any character (except for line terminators), repeated at least once

Positive Lookahead(?=( by .+?\.)|(\.))

1st Alternative( by .+?\.)

Group 1( by .+?\.)

by the literal text by (case sensitive)

.+?any character (except for line terminators), repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative(\.)

Group 2(\.)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

^.+?(?=( by .+?\.)|(\.))

New

Glass 849 by joseph stalin.png
Glass 24 by adolf hitler.jpg
Cloud 9 by C9Gaming.psd
154.png
286 by 666k.jpg
test123.jpg

Glass 849 by joseph stalin.png
Glass 24 by adolf hitler.jpg
Cloud 9 by C9Gaming.psd
154.png
286 by 666k.jpg
test123.jpg