Regular Expressions 101

Pro

^start of line

Group FullFileName(?<FullFileName>(?<imageNumber>\d+)(?:_[ho]\.png|\.json))

Group imageNumber(?<imageNumber>\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:_[ho]\.png|\.json)

1st Alternative_[ho]\.png

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[ho]

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

pngthe literal text png (case sensitive)

2nd Alternative\.json

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

jsonthe literal text json (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.

26 tokens

^(?<FullFileName>(?<imageNumber>\d+)(?:_[ho]\.png|\.json))$

New

1.json
12.json
000.json
가1.json
11.json1
1_o.png
1_h.png
1.png
가.png
가거리1_o.png

1.json
12.json
000.json
가1.json
11.json1
1_o.png
1_h.png
1.png
가.png
가거리1_o.png