Regular Expressions 101

Explanation

Pro

^start of line

Group 1(-?\d+(?:\.\d+)?)

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Group 2(-?\d+(?:\.\d+)?)

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:,[a-zA-Z ]*)?

?repeats the group contents below at most once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[a-zA-Z ]*

*matches any number of characters from the set below:

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

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

the literal (32₁₀ / 40₈ / 20₁₆)

$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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^(-?\d+(?:\.\d+)?),\s*(-?\d+(?:\.\d+)?)(?:,[a-zA-Z ]*)?$

New

what should match

-43.48394, 87.394886
-43.44884, 88.344774, home
-43.87778, 88.987566,
what should not match

-43.89987, 89.345434 home
-43.44884, 88.344774, home, restaurant

Extraction

what should match

-43.48394, 87.394886
-43.44884, 88.344774, home
-43.87778, 88.987566,
what should not match

-43.89987, 89.345434 home
-43.44884, 88.344774, home, restaurant