Regular Expressions 101

Pro

1st Alternative([yYzZ](?!\S))

Group 1([yYzZ](?!\S))

Character Class[yYzZ]

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

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

zthe literal z (122₁₀ / 172₈ / 7A₁₆) (case sensitive)

Zthe literal Z (90₁₀ / 132₈ / 5A₁₆) (case sensitive)

Negative Lookahead(?!\S)

\Sany non-whitespace character

2nd Alternative.

.any character (except for line terminators)

Global pattern flags

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

Detailed match information will be displayed here automatically.

27 tokens

([yYzZ](?!\S))|.

New

fez day
day fez
day fyyyz
day yak
day:yak
!!day--yaz!!
yak zak
DAY abc XYZ
aaz yyz my
y2bz
zxyx
other tests
X

$1

fez day
day fez
day fyyyz
day yak
day:yak
!!day--yaz!!
yak zak
DAY abc XYZ
aaz yyz my
y2bz
zxyx
other tests
X