Regular Expressions 101

1st Alternative(?<=\d)\s+(?=[a-zA-Z])

Positive Lookbehind(?<=\d)

\da digit

\s+any whitespace character, repeated at least once

Positive Lookahead(?=[a-zA-Z])

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

2nd Alternative(?<=[a-zA-Z])\s+(?=\d)

Positive Lookbehind(?<=[a-zA-Z])

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

\s+any whitespace character, repeated at least once

Positive Lookahead(?=\d)

\da digit

3rd Alternative(?<=\d)\s+(?=\d)

Positive Lookbehind(?<=\d)

\da digit

\s+any whitespace character, repeated at least once

Positive Lookahead(?=\d)

\da digit

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

(?<=\d)\s+(?=[a-zA-Z])|(?<=[a-zA-Z])\s+(?=\d)|(?<=\d)\s+(?=\d)

New

2 Marine Cargo       14,642 10,528  Denver Factory North     16,016 more text 8,609 argA 2,106 argB