Regular Expressions 101

Character Class[\w.-]+

+matches at least one character from the set below:

\wa Unicode word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Negative Lookahead(?![\w.-]*\.(?:png|jpe?g|gif)\b)

Character Class[\w.-]*

*matches any number of characters from the set below:

\wa Unicode word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:png|jpe?g|gif)

1st Alternativepng

pngthe literal text png (case sensitive)

2nd Alternativejpe?g

jpthe literal text jp (case sensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

3rd Alternativegif

gifthe literal text gif (case sensitive)

\ba Unicode word boundary

Character Class[\w.-]+

+matches at least one character from the set below:

\wa Unicode word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\ba Unicode word boundary

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

[\w.-]+@(?![\w.-]*\.(?:png|jpe?g|gif)\b)[\w.-]+\b

New

{'email': ['billy666@stanford.edu',
           'cantorfamilies@stanford.edu',
           'cantorfamilies@stanford.edu',
           'cantorfamilies@stanford.edu',
           'footer-stanford-logo@2x.png']}

Regular Expression

Extraction