regex101: JavaScript Match Workspace

1st Alternative@(\"[\w\s]+\")

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 1(\"[\w\s]+\")

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Character Class[\w\s]+

+matches at least one character from the set below:

\wany word character

\sany whitespace character

\"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative(?!@(\w+)@(\w+))@(\w+)

Negative Lookahead(?!@(\w+)@(\w+))

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 2(\w+)

\w+any word character, repeated at least once

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 3(\w+)

\w+any word character, repeated at least once

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 4(\w+)

\w+any word character, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

@(\"[\w\s]+\")|(?!@(\w+)@(\w+))@(\w+)

New

There is @key1 apples on the table.  
There is @"key1" apples on the table.  
There is @key 4 apples on the table.
There is @"key 4" apples on the table.

There is @key@key2 apples on the table.
There is @key3 apples on the table. (second step)

There is @"key @"key3"" apples on the table.
There is @"key 4" apples on the table. (second step)

There is @"key @key3" apples on the table.
There is @"key 4" apples on the table. (second step)

There is @"key @key3 " apples on the table.
There is @"key 4 " apples on the table. (second step)

There is @"key @"key3@key7"" apples on the table.
There is @"key @"key32"" apples on the table. (second step)
There is @"key 21" apples on the table. (3rd step)

There is @key@key2@key3@key4 apples on the table.
There is @key@key2@key35 apples on the table. (second step)
There is @key@key26 apples on the table. (3rd step)
There is @key7 apples on the table. (4th step)

Regular Expressions 101

Regular Expression

Substitution