Function str-index-of

str-index-of aString1 aString2

Finds the index of the first occurence of a string inside another string.

Parameters:

aString1 - The string where the search for the aString2 will be performed.

aString2 - The string to be searched inside aString1.

Returns:

An integer representing the index of the first occurence of aString2 inside aString1, or -1 if aString1 does not contain aString2.