Regular Expressions 101

Pro

\ba Unicode word boundary

Group 1(yest(?:e(?:r(?:d(?:ay?)?)?)?)?|tod(?:ay?)?|tom(?:o(?:r(?:r(?:ow?)?)?)?)?)

1st Alternativeyest(?:e(?:r(?:d(?:ay?)?)?)?)?

yestthe literal text yest (case insensitive)

Non-Capturing Group(?:e(?:r(?:d(?:ay?)?)?)?)?

?repeats the group contents below at most once:

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case insensitive)

Non-Capturing Group(?:r(?:d(?:ay?)?)?)?

?repeats the group contents below at most once:

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case insensitive)

Non-Capturing Group(?:d(?:ay?)?)?

?repeats the group contents below at most once:

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case insensitive)

Non-Capturing Group(?:ay?)?

?repeats the group contents below at most once:

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

y?optionally matches the literal y (121₁₀ / 171₈ / 79₁₆) (case insensitive)

2nd Alternativetod(?:ay?)?

todthe literal text tod (case insensitive)

Non-Capturing Group(?:ay?)?

?repeats the group contents below at most once:

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

y?optionally matches the literal y (121₁₀ / 171₈ / 79₁₆) (case insensitive)

3rd Alternativetom(?:o(?:r(?:r(?:ow?)?)?)?)?

tomthe literal text tom (case insensitive)

Non-Capturing Group(?:o(?:r(?:r(?:ow?)?)?)?)?

?repeats the group contents below at most once:

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

Non-Capturing Group(?:r(?:r(?:ow?)?)?)?

?repeats the group contents below at most once:

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case insensitive)

Non-Capturing Group(?:r(?:ow?)?)?

?repeats the group contents below at most once:

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case insensitive)

Non-Capturing Group(?:ow?)?

?repeats the group contents below at most once:

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

w?optionally matches the literal w (119₁₀ / 167₈ / 77₁₆) (case insensitive)

\ba Unicode word boundary

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

\b(yest(?:e(?:r(?:d(?:ay?)?)?)?)?|tod(?:ay?)?|tom(?:o(?:r(?:r(?:ow?)?)?)?)?)\b

New

yest
yeste
yester
yesterd
yesterda
yesterday
tod
toda
today
tom
tomo
tomor
tomorr
tomorro
tomorrow

yesteray
tomorow
tommorrow
tody
yesteday