Regular Expressions 101

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

\d+a digit, repeated at least once

Group 1(\.\w+)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w+any word character, repeated at least once

$end of string, or before its final line terminator

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Regular Expression

-\d+x\d+(\.\w+)$

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