Regular Expressions 101

Pro

\ban ASCII word boundary

Character Class[bB]

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Character Class[yY]

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

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

\ban ASCII word boundary

Negative Lookahead(?!.*\b[bB][yY]\b.*)

.*any character (except for line terminators), repeated any number of times

\ban ASCII word boundary

Character Class[bB]

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

Character Class[yY]

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

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

\ban ASCII word boundary

.*any character (except for line terminators), repeated any number of times

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

\b[bB][yY]\b(?!.*\b[bB][yY]\b.*)

New

Go by the office and pickup milk by the safeway BY tomorrow

Go by the office and pickup milk by the safeway BY tomorrow