Regular Expressions 101

Condition(?(?=.* .*)(?:([^ \n>]*)(?:.*))|([^\w\W]))

Uses the first branch if the lookaround matches

Positive Lookahead(?=.* .*)

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

the literal (32₁₀ / 40₈ / 20₁₆)

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

If the condition is true, match this branch:(?:([^ \n>]*)(?:.*))

Non-Capturing Group(?:([^ \n>]*)(?:.*))

Group 1([^ \n>]*)

Negated Character Class[^ \n>]*

*matches any number of characters outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Non-Capturing Group(?:.*)

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

Otherwise, match this branch:([^\w\W])

Group 2([^\w\W])

Negated Character Class[^\w\W]

\wany word character

\Wany non-word character

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.

Search reference

Regular Expression

(?(?=.* .*)(?:([^ \n>]*)(?:.*))|([^\w\W]))

New

"SWN-WZ-SB00-49-03-C11>> bla"

"SWN-WZ-SB00-49-03-C11 >>  "

"SWN-WZ-SB00-49-03-C11 >>"

"SWN-WZ-SB00-49-03-C11 >> bla"

"SWN-WZ-SB00-49-03-C11>>"

"hui"

"SWN-WZ-SB00-49-03-C1"