Regular Expressions 101

Pro

constthe literal text const (case insensitive)

\s+any whitespace character, repeated at least once

Group c(?<c>[a-z][a-z\d_]*)

Character Class[a-z]

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

Character Class[a-z\d_]*

*matches any number of characters from the set below:

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

\da digit

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\s*any whitespace character, repeated any number of times

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\s*any whitespace character, repeated any number of times

Group q(?<q>["'])

Character Class["']

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Group v(?<v>(?:\\\k<q>|(?!\k<q>).)*)

Non-Capturing Group(?:\\\k<q>|(?!\k<q>).)*

*repeats the group contents below any number of times:

1st Alternative\\\k<q>

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\k<q>the text saved by group q

2nd Alternative(?!\k<q>).

Negative Lookahead(?!\k<q>)

\k<q>the text saved by group q

.any character (except for line terminators)

Non-Capturing Group(?:\k<q>)

\k<q>the text saved by group q

\s*any whitespace character, repeated any number of times

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

25 tokens

const\s+(?<c>[a-z][a-z\d_]*)\s*=\s*(?<q>["'])(?<v>(?:\\\k<q>|(?!\k<q>).)*)(?:\k<q>)\s*;

New

const SIMPLE = "simple";
const WITH_S_QUOTE = "exam \" with quote";

const SIMPLE = "simple";
const WITH_S_QUOTE = "exam \" with quote";