Regular Expressions 101

Character Class[_a-zA-Z]

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

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

\w*any word character, repeated any number of times

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

Group 1(\[.*\])?

?repeats the group contents below at most once:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

[_a-zA-Z]\w*\s*(\[.*\])?

New

foo
bar[1]
baz[1:5:1]
qux[[1,2,3]]


This does not work:

foo + bar[1] + baz[1:10:var1[2+1]] + qux[[1,2,int(var2)]] + bob[len("foobar")] + func() + func2 (var3[0])

Regular Expression

Substitution