Regular Expressions 101

\ban ASCII word boundary

_{1}the literal _ (95₁₀ / 137₈ / 5F₁₆) , repeated exactly 1 time

Group 1([a-zA-Z0-9]+)

Character Class[a-zA-Z0-9]+

+matches at least one character 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)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\ban ASCII word boundary

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

\b_{1}([a-zA-Z0-9]+)\b

New

_Calculate the _area of the _perfectRectangle object.

The _id and _age variables are both integers.

__invalidVariable _evenMoreInvalidVariable_ _validVariable

Regular Expression

Extraction