STRING INDEX

STRING INDEX
STRING RIGHT INDEX

Let Subcommand

Return the start and stop position of a substring within a string.

LET <nstart> <nstop> = STRING INDEX <sorg> <smatch>
where <nstart> is a parameter containing the returned start position;
            <nstop> is a parameter containing the returned stop position;
            <sorg> is the original string;
            and     <smatch> is the substring to be matched within <sorg>;


This syntax searches <sorg> from left to right.

LET <nstart> <nstop> = STRING RIGHT INDEX <sorg> <smatch>
where <nstart> is a parameter containing the returned start position;
            <nstop> is a parameter containing the returned stop position;
            <sorg> is the original string;
            and     <smatch> is the substring to be matched within <sorg>;


This syntax searches <sorg> from right to left.

LET NSTART NSTOP = STRING INDEX S1 S2
LET NSTART NSTOP = STRING RIGHT INDEX SORG SMATCH

Both of the strings on the right hand side of the equal sign must be previously defined strings. String expressions are not allowed. So
LET NSTART NSTOP = STRING INDEX SORG ".dat"

should be coded as

LET STRING S2 = .dat
LET NSTART NSTOP = STRING INDEX SORG S2

None

STRING FIND is a synonym for STRING INDEX
STRING RIGHT FIND is a synonym for STRING RIGHT INDEX

UPPER CASE	= Convert a string to upper case.
LOWER CASE	= Convert a string to lower case.
LET FUNCTION	= Defines a function.
LET STRING	= Defines a string.
READ STRING	= Reads a string from a file.
SUBSTITUTE CHARACTER (^)	= Substitute the value of a string or parameter.
CONCATENATE CHARACTER (&)	= Concatenate two strings.
SUBTRING	= Extract a substring from an existing string.
STRING CONCATENATE	= Concatenate one or more previously defined strings.
STRING EDIT	= Edit a string.
STRING MERGE	= Insert a string into another string without overwrite.
STRING REPLACE	= Insert a string into another string with overwrite.
STRING LENGTH	= Return the length of a string.
CHARACTER	= Convert numeric values to strings based on the ASCII collating sequence.
ICHAR	= Convert a string to numeric values based on the ASCII collating sequence.
GROUP LABEL	= Define the text for group labels.

Data Management

2008/11
2018/10: Added STRING RIGHT INDEX
2018/10: Added STRING FIND as a synonym for STRING INDEX

 
LET STRING S1 = file23.dat
LET STRING S2 = 23
LET NSTART NSTOP = STRING INDEX S1 S2
    

The resulting values of NSTART and NSTOP are 5 and 6, respectively.