☜	$PIECE 1977 Version of ANSI Standard					☞

3.2.8 Functions function

$P[IECE]( expr₁ , expr₂ , intexpr₃ )

Let expr₁, expr₂ be the strings S, D. Let intexpr₃ be the integer in. $P(S, D, m) returns the substring of S bounded by but not including the m–1^th and the m^th occurrences of D.

$P(S, D, m) = $E(S, NF(S, D, m–1), NF(S, D, m) - $L(D) - 1).

$P[IECE]( expr₁ , expr₂ , intexpr₃ , intexpr₄ )

Let intexpr₄ be the integer n. $P(S, D, m, n) returns the substring of S bounded on the left but not including the (m–1)th occurrence of D in S, and bounded on the right but not including the nth occurrence of D in S.

$P(S, D, in, n) = $E(S, NF(S, D, m–1), NF(S, D, n) - $L(D) - 1).

Note that $P(S, D, m, m) = $P(S, D, m).

See also the transition diagram for $Piece.

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Copyright © Annotations: 2008-2024 Ed de Moel.

This page most recently updated on 15-Nov-2023, 13:11:13.

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