Regular Expressions 101

Pro

^start of line

Positive Lookahead(?=[01]{10}$)

Character Class[01]{10}

{10}matches exactly 10 characters from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

$end of line

Group 1(..)

.any character (except for line terminators)

Group 2(.*1.*1.*)

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

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

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

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

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

Group 3(..)

.any character (except for line terminators)

Group 4(..)

.any character (except for line terminators)

$end of line

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

^(?=[01]{10}$)(..)(.*1.*1.*)(..)(..)$

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