CodeunitOffsetBefore

Type

operator

Summary

Finds the first or last occurrence of Needle before a specified index in Target.

Syntax

the ( first | last ) offset of codeunits <Needle> before <Before> in <Target>

Description

The first (respectively last) offset of Needle in Target is number of codeunits between the first codeunit of Target, and the first (respectively last) occurrence of Needle in the substring of Target ending at codeunit Before - 1. If neither first or last is specified, then the last offset is found. If Needle does not occur in the given substring of Target, then the output is 0.

Parameters

Name	Type	Description
Needle		An expression which evaluates to a string.
Target		An expression which evaluates to a string.
Before		An expression which evaluates to a valid integer index of Target.

Examples

variable tVar as Number
variable tLastDot as Number
variable tAddress as String
variable tTLD as String
put "http://www.livecode.com/index.html" into tAddress
put the last offset of "." in tAddress into tLastDot
put the offset of "." before tLastDot in tAddress into tVar
put codeunit tVar + 1 to tVar + 3 of tAddress into tTLD -- tTLD contains "com"