Regular Expressions 101

Pro

Negative Lookbehind(?<![^_\n])

Negated Character Class[^_\n]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

Character Class[A-Z]{2,3}

{2,3}matches between 2 and 3 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Negative Lookahead(?![^_\n])

Negated Character Class[^_\n]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

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

(?<![^_\n])[A-Z]{2,3}(?![^_\n])

New

VEX_BLE_NW_maRIu
VEP_AS_maSAusz_TXZ
NE_lapKS_US

VEX_BLE_NW_maRIu
VEP_AS_maSAusz_TXZ
NE_lapKS_US