Difference between revisions of "AT()"

Revision as of 16:00, 26 November 2009

Purpose

Function to search for a substring

Syntax

AT(<expC1>, <expC2> | <memofield> [,<expN>])

See Also

ATNEXT(), INLIST(), LEFT(), OCCURS(), RAT(), RIGHT(), STR(), STREXTRACT(), STRPOS(), STRTRAN(), STUFF(), SUBSTR()

Description

AT() is the substring search function. It returns a number signifying the starting position of <expC1> in <expC2> or in the specified memo field. If the substring is not contained within <expC2> or <memofield>, then the function returns the value 0. The leftmost character of a string is in character position 1. The AT() function will return the starting position of the Nth occurrence of <expC1> when the optional numeric expression <expN> is specified. The AT() function is particularly useful in conjunction with the LEFT() or SUBSTR() functions for locating starting points for extracting text from a string.

Example

? at("is", "Recital is good") 
         9
cString1 = "is"
cString2 = "Recital is good" 
? at(cString1, cString2)
         9

Products

Recital Server, Recital