Regular Expressions 101

datthe literal text dat (case insensitive)

\D*?any character that's not a digit, repeated any number of times

wythe literal text wy (case insensitive)

\D*any character that's not a digit, repeated any number of times

Group 1(\d{1,4}([\/ .-])\d{1,2}\2\d{1,4})

\d{1,4}a digit, repeated between 1 and 4 times

Group 2([\/ .-])

Character Class[\/ .-]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

\2the text saved by group 2

\d{1,4}a digit, repeated between 1 and 4 times

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

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Search reference

Regular Expression

dat\D*?wy\D*(\d{1,4}([\/ .-])\d{1,2}\2\d{1,4})

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