Regular Expressions 101

Pro

\ban ASCII word boundary

Group 1([A-Z])

Character Class[A-Z]

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

\w+any word character, repeated at least once

the literal (32₁₀ / 40₈ / 20₁₆)

Group 2([A-Z])

Character Class[A-Z]

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

\w+any word character, repeated at least once

the literal (32₁₀ / 40₈ / 20₁₆)

Group 3([A-Z])

Character Class[A-Z]

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

\w+any word character, repeated at least once

the literal (32₁₀ / 40₈ / 20₁₆)

Group 4([A-Z])

Character Class[A-Z]

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

\w+any word character, repeated at least once

Positive Lookahead(?= $\1\2\3\4$)

the literal (32₁₀ / 40₈ / 20₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\1the text saved by group 1

\2the text saved by group 2

\3the text saved by group 3

\4the text saved by group 4

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

Regular Expression

\b([A-Z])\w+ ([A-Z])\w+ ([A-Z])\w+ ([A-Z])\w+(?= \(\1\2\3\4\))

New

This is a block of text MIDI The USB Device Class Definition for MIDI Devices transmits Music Instrument Digital Interface (MIDI).

I need to select only the "Music Instrument Digital Interface"

Extraction

This is a block of text MIDI The USB Device Class Definition for MIDI Devices transmits Music Instrument Digital Interface (MIDI).

I need to select only the "Music Instrument Digital Interface"