Regular Expressions 101

Pro

(?i)applies the following effective flags to the remainder of the pattern: gmi

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

Non-Capturing Group(?:adafruit)

adafruitthe literal text adafruit (case insensitive)

Non-Capturing Group(?:[0–9a-z\-_\t .]{0,20})

Character Class[0–9a-z\-_\t .]{0,20}

{0,20}matches between 0 and 20 characters from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

–the literal – (8211₁₀ / 20023₈ / 2013₁₆)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

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

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\ta tab character (ASCII 9)

the literal (32₁₀ / 40₈ / 20₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[\s|']|[\s|"]){0,3}

{0,3}repeats the group contents below between 0 and 3 times:

1st Alternative[\s|']

Character Class[\s|']

\sany whitespace character

|the literal | (124₁₀ / 174₈ / 7C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative[\s|"]

Character Class[\s|"]

\sany whitespace character

|the literal | (124₁₀ / 174₈ / 7C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:=|>|:=|<=|=>|:)

1st Alternative=

=the literal = (61₁₀ / 75₈ / 3D₁₆)

2nd Alternative>

>the literal > (62₁₀ / 76₈ / 3E₁₆)

3rd Alternative:=

:=the literal text :=

4th Alternative<=

<=the literal text <=

5th Alternative=>

=>the literal text =>

6th Alternative:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?i)(?:adafruit)(?:[0–9a-z\-_\t .]{0,20})(?:[\s|']|[\s|"]){0,3}(?:=|>|:=|<=|=>|:)

"adafruit_api_key" = "x-xfiu9qulytekagka60cn2ey1rrrba4"

Substitution

"adafruit_api_key" = "x-xfiu9qulytekagka60cn2ey1rrrba4"