Regular Expressions 101

Explanation

Pro

Group 1(_[^=]+)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Negated Character Class[^=]+

+matches at least one character outside the set below:

=the literal = (61₁₀ / 75₈ / 3D₁₆)

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

Group 2([^_\n]+)

Negated Character Class[^_\n]+

+matches at least one character outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\na line-feed (newline) character (ASCII 10)

Positive Lookahead(?=_|\.\w{3}$)

1st Alternative_

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

2nd Alternative\.\w{3}$

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{3}any word character, repeated exactly 3 times

$end of line

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.

26 tokens

(_[^=]+)=\s*([^_\n]+)(?=_|\.\w{3}$)

New

FilePrefix_Speed= 3.5 kmph_Accel= +0.5 m/(s^2) _Height=+7ms_Set=High.txt

FilePrefix_Speed= 3.5 kmph_Accel= +0. m/(s^2) _Height=+7ms_Set=High.txt

FilePrefix_Speed= 3.5 kmph_Accel= +0.5 m/(s^2) _Height=+7ms_Set=High.txt

FilePrefix_Speed= 3.5 kmph_Accel= +0. m/(s^2) _Height=+7ms_Set=High.txt