☜	$FIND 1977 Version of ANSI Standard					☞

3.2.8 Functions function

$F[IND]( expr₁ , expr₂ )

searches for the leftmost occurrence of the value of expr₂ in the value of expr₁. If none is found, $F returns zero. If one is found, the value returned is the integer representing the number of the character position immediately to the right of the rightmost character of the found occurrence of expr₂ in expr₁. In particular, if the value of expr₂ is empty, $F returns 1.

$F[IND]( expr₁ , expr₂ , intexpr₃ )

Let m be the value of intexpr₃. $F begins the search at the mth position of expr₁. If no instance of expr₂ is found, $F returns zero; otherwise, $F(A,B,m) = $F($E(A,m,$L(A)),B) + m - 1.

See also the transition diagram for $Find.

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Copyright © Examples: 1995-2024 Ed de Moel;
Copyright © Annotations: 2003-2008 Jacquard Systems Research
Copyright © Annotations: 2008-2024 Ed de Moel.

This page most recently updated on 13-Sep-2014, 16:41:44.

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