Pattern Matching Functions

Pattern matching makes possible some of the most succinct and elegant programs in the Mathematica language—immediately compressing large numbers of conditional cases into simple, readable and efficient pattern specifications.

ReferenceReference

Cases a list of elements matching a pattern

Position positions of elements matching a pattern

Count a count of occurrences of a pattern

ReplaceAll (/.) replace all occurrences of a pattern

DeleteCases delete all occurrences of a pattern

Set (=), SetDelayed (:=) — define transformations for patterns

MemberQ test if any member of a list matches a pattern

FreeQ test if an expression is free of a pattern

MatchQ test whether an expression matches a pattern

Patterns for Part Specifications

SparseArray ▪ ReplacePart ▪ Grid

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