Regular Expressions 101

Pro

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Negated Character Class[^_]+

+matches at least one character outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Positive Lookahead(?=\.pdf$)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

pdfthe literal text pdf (case sensitive)

$end of line

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

_[^_]+(?=\.pdf$)

YTER-01-0B-B-PD-00003-2_R12B.pdf
YTER-01-0A-B-PZ-00001-2_R9B.pdf
YTER-01-0U-B-PG-00003-1_R1B.pdf
YTER-01-0G-B-PP-00005-1_R4B.pdf

YTER-01-0B-B-PD-00003-2_R12B.pdf
YTER-01-0A-B-PZ-00001-2_R9B.pdf
YTER-01-0U-B-PG-00003-1_R1B.pdf
YTER-01-0G-B-PP-00005-1_R4B.pdf