Regular Expressions 101

^start of line

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

importthe literal text import (case sensitive)

Non-Capturing Group(?:\s*[*{]|\s+[$_a-zA-Z'"])

1st Alternative\s*[*{]

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

Character Class[*{]

*the literal * (42₁₀ / 52₈ / 2A₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

2nd Alternative\s+[$_a-zA-Z'"]

\s+any whitespace character, repeated at least once

Character Class[$_a-zA-Z'"]

$the literal $ (36₁₀ / 44₈ / 24₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

\n?optionally matches a line-feed (newline) character (ASCII 10)

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

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25 tokens

Regular Expression

^\s*import(?:\s*[*{]|\s+[$_a-zA-Z'"]).*\n?

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