Regular Expressions 101

Explanation
Pro

^start of line

Negated Character Class[^%]*?

*?matches any number of characters outside the set below:

%the literal % (37₁₀ / 45₈ / 25₁₆)

Positive Lookbehind(?<=[^'\"])

Negated Character Class[^'\"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

\ban ASCII word boundary

Group 1(addpaths|addpath|test)

1st Alternativeaddpaths

addpathsthe literal text addpaths (case sensitive)

2nd Alternativeaddpath

addpaththe literal text addpath (case sensitive)

3rd Alternativetest

testthe literal text test (case sensitive)

\ban ASCII word boundary

Positive Lookahead(?=[^'\"])

Negated Character Class[^'\"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^[^%]*?(?<=[^'\"])\b(addpaths|addpath|test)\b(?=[^'\"]).*?$

New

function addpaths()
  % function addpaths to add paths to path
  fprintf('running addpaths')
  fprintf('addpaths running')
  fprintf('running addpaths function')

  % fprintf('running addpaths')
  % fprintf('addpaths running')
  % fprintf('running addpaths function')

  % test what happens to 'test'
  run('test')
  'this is a test.'
  test