Regular Expressions 101

1st Alternative(?sx) ０(?=.*(0))

(?sx)applies the following effective flags to the remainder of the pattern: gsx

s modifier: single line. Allows a dot to match line terminators

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

０the literal text ０

Positive Lookahead(?=.*(0))

.*any character, repeated any number of times

Group 1(0)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative１(?=.*(1))

１the literal １ (65297₁₀ / 177421₈ / FF11₁₆)

Positive Lookahead(?=.*(1))

.*any character, repeated any number of times

Group 2(1)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3rd Alternative２(?=.*(2))

２the literal ２ (65298₁₀ / 177422₈ / FF12₁₆)

Positive Lookahead(?=.*(2))

.*any character, repeated any number of times

Group 3(2)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

4th Alternative３(?=.*(3))

３the literal ３ (65299₁₀ / 177423₈ / FF13₁₆)

Positive Lookahead(?=.*(3))

.*any character, repeated any number of times

Group 4(3)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

5th Alternative４(?=.*(4))

４the literal ４ (65300₁₀ / 177424₈ / FF14₁₆)

Positive Lookahead(?=.*(4))

.*any character, repeated any number of times

Group 5(4)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

6th Alternative５(?=.*(5))

５the literal ５ (65301₁₀ / 177425₈ / FF15₁₆)

Positive Lookahead(?=.*(5))

.*any character, repeated any number of times

Group 6(5)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

7th Alternative６(?=.*(6))

６the literal ６ (65302₁₀ / 177426₈ / FF16₁₆)

Positive Lookahead(?=.*(6))

.*any character, repeated any number of times

Group 7(6)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

8th Alternative７(?=.*(7))

７the literal ７ (65303₁₀ / 177427₈ / FF17₁₆)

Positive Lookahead(?=.*(7))

.*any character, repeated any number of times

Group 8(7)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

9th Alternative８(?=.*(8))

10th Alternative９(?=.*(9))

Global pattern flags

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

s modifier: single line. Allows a dot to match line terminators

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?sx)
０(?=.*(0))
|１(?=.*(1))
|２(?=.*(2))
|３(?=.*(3))
|４(?=.*(4))
|５(?=.*(5))
|６(?=.*(6))
|７(?=.*(7))
|８(?=.*(8))
|９(?=.*(9))

New

０ zero 
１ ichi 
２ ni 
３ san 
４ shi 
５ go
６ roku
７ shichi
８ hachi
９ kyuu
0123456789

Extraction

０ zero 
１ ichi 
２ ni 
３ san 
４ shi 
５ go
６ roku
７ shichi
８ hachi
９ kyuu
0123456789