What about using $addtok, $istok and $deltok (You need to use $findtok in $deltok to find the position of the token)?
[I hate when firefox crashes because of Shift + Enter]
I've used this method before, and it works fine, as you only need one variable to store the data, and $istok won't match 'a' in "b c d e ae".
From the help file:
$addtok(text,token,C)
Adds a token to the end of text but only if it's not already in text.
$addtok(a.b.c,d,46) returns a.b.c.d
$addtok(a.b.c.d,c,46) returns a.b.c.d
The C parameter is the ascii value of the character separating the tokens.
Note: $addtokcs() is the case-sensitive version.
$deltok(text,N-N2,C)
Deletes the Nth token from text.
$deltok(a.b.c.d,3,46) returns a.b.d
$deltok(a.b.c.d,2-3,46) returns a.d
You can specify a negative value for N.
$findtok(text,token,N,C)
Returns the position of the Nth matching token in text.
$findtok(a.b.c.d,c,1,46) returns 3
$findtok(a.b.c.d,e,1,46) returns $null
If you specify zero for N, it returns the total number of matching tokens.
Note: $findtokcs() is the case-sensitive version.
$gettok(text,N,C)
Returns the Nth token in text.
$gettok(a.b.c.d.e,3,46) returns c
$gettok(a.b.c.d.e,9,46) returns $null
You can also specify a range of tokens:
$gettok(a.b.c.d.e,2-,46) returns 2nd token onwards b.c.d.e
$gettok(a.b.c.d.e,2-4,46) returns tokens 2 through 4 b.c.d
You can specify a negative value for N.
$istok(text,token,C)
Returns $true if token exists, otherwise returns $false.
Note: $istokcs() is the case-sensitive version.
