☜	$FIND 1995 Version of ANSI (Equivalent to Current ISO Version) of Standard					☞

7.1.5.5 $Find

$F[IND] ( expr₁ , expr₂ )

This form searches for the leftmost occurrence of the value of expr₂ in the value of expr₁. If none is found, $Find 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, $Find returns 1.

$F[IND] ( expr₁ , expr₂ , intexpr )

Let a be the value of expr₁, let b be the value of expr₂, and let m be the value of intexpr. $Find(a,b,m) searches for the leftmost occurrence of b in a, beginning the search at the max(m,1) position of a. Let p be the value of the result of $Find($Extract(a,m,$Length(a)),b). If no instance of b is found (i.e., p=0), $Find returns the value 0; otherwise, $Find(a,b,m) = p + max(m,1) - 1.

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

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