Regular Expressions 101

Kthe literal K (75₁₀ / 113₈ / 4B₁₆) (case sensitive)

Positive Lookahead(?=Y)

Ythe literal Y (89₁₀ / 131₈ / 59₁₆) (case sensitive)

Group 1([^\/]*?)

Negated Character Class[^\/]*?

*?matches any number of characters outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

K(?=Y)([^\/]*?)[0-9]{4}

JKan 1987
KYan this is /uaaaaaaaa 1987
KYanaaa this is aaaaaa 1987