Regular Expressions 101

Pro

^start of line

Group 1(.*(?<!_test)\.txt$)

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

Negative Lookbehind(?<!_test)

_testthe literal text _test (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

txtthe literal text txt (case sensitive)

$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.

25 tokens

^(.*(?<!_test)\.txt$)

New

somepath/testFile.txt
somepath/test_File.txt
somepath/testFile_test.txt
somepath/testFile.txtTEMP

somepath/testFile.txt
somepath/test_File.txt
somepath/testFile_test.txt
somepath/testFile.txtTEMP