Regular Expressions 101

Pro

1st Alternative\b0

\ban ASCII word boundary

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative([0-1])(?=0*~[0-1]*?\1([0-1]))

Group 1([0-1])

Character Class[0-1]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

Positive Lookahead(?=0*~[0-1]*?\1([0-1]))

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Character Class[0-1]*?

*?matches any number of characters from the set below:

0-1one character from 0 (48₁₀) to 1 (49₁₀)

\1the text saved by group 1

Group 2([0-1])

Character Class[0-1]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

3rd Alternative~[0-1]*

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Character Class[0-1]*

*matches any number of characters from the set below:

0-1one character from 0 (48₁₀) to 1 (49₁₀)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

\b0|([0-1])(?=0*~[0-1]*?\1([0-1]))|~[0-1]*

New

0101~010

0101~010