HoldPattern

Disponível

Keeps a pattern from evaluating while staying transparent to matching and to replacement rules

Formas

HoldPattern[expr]

Exemplos verificadosCases[{a -> b, c -> d}, HoldPattern[a -> _]] → {a -> b}

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Tópicos

Evaluation Control - More Detailed Control
Patterns - Composite Patterns

Relacionados

Hold Verbatim Unevaluated Alternatives Except HoldAllComplete HoldComplete KeyValuePattern Longest NHoldAll NHoldFirst NHoldRest

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