Regular Expressions 101

Pro

Group 1(Sample2)

Sample2the literal text Sample2 (case insensitive)

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

Group 2(\d{2}-\d{2}-\d{4})

\d{2}a digit, repeated exactly 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4}a digit, repeated exactly 4 times

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

Positive Lookbehind(?<=[a-z]_)

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 3(\d+)

\d+a digit, repeated at least once

Positive Lookahead(?=_\d+)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\d+a digit, repeated at least once

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

Positive Lookbehind(?<=_)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 4(\d+)

\d+a digit, repeated at least once

$end of string, or before its final line terminator

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

(Sample2).*(\d{2}-\d{2}-\d{4}).*(?<=[a-z]_)(\d+)(?=_\d+).*(?<=_)(\d+)$

Sample1_Sample2_1_05-11-2015_0_Sample3-AB_C_D_045_4_Sample4_123456

Sample1_Sample2_1_05-11-2015_0_Sample3-AB_C_D_045_4_Sample4_123456