STRING STARTS WITH

STRING STARTS WITH

Let Subcommand

Return a 1 if a string starts with a specified substring and a 0 if it does not.

LET <iflag> = STRING STARTS WITH <s1> <s2>
where <iflag> is a parameter containing a 1 if <s1> starts with <s2> and 0 otherwise;
            <s1> is the name of a pre-existing string;
and     <s2> is the name of a pre-existing string.

LET IFLAG = STRING STARTS WITH S1 S2

The strings on the right hand side of the equal sign must be previously existing strings. That is, expressions are not allowed. For example, the following will result in an error message
LET IFLAG = STRING STARTS WITH "alan.heckert@nist.gov" "alan"

you need to do

LET STRING SORG = alan.heckert@nist.gov
LET STRING SMATCH = alan
LET SOUT = STRING STARTS WITH SORG SMATCH


The name on the left hand side of the equal sign should either be a previously existing parameter or not previously defined. If it is a previously existing string, variable, or matrix name, an error will be reported and the requested parameter will not be created.

The total number of characters that DATAPLOT can use for storing functions and strings is set when DATAPLOT is built. The current default (11/2008) is 50,000 characters. Previous versions may set this limit at 1,000 or 10,000 characters. This limit applies to the combined number of characters for all functions and strings.

None

None

STRING ENDS WITH	=	Check whether a string starts with a specified substring.
LET FUNCTION	=	Defines a function.
LET STRING	=	Defines a string.
READ STRING	=	= Reads a string from a file.
STRING REMOVE SPACE	=	Remove spaces from a string.
STRING REMOVE PUNCTUATION	=	Remove punctuation from a string.
STRING DELETE	=	Remove user specifed characters from a string.
NUMBER OF WORDS	=	Return the number of words in a string.
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.
BLANK STRING	=	Create a blank string.
STRING INDEX	=	Extract the start/stop positions of a substring within a 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 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.

Data Management

2018/10

 
LET STRING S1 = alan.heckert@gmail.com
LET STRING S2 = alan
LET IFLAG = STRING STARTS WITH S1 S2
PRINT IFLAG
    

The following output is returned

 
 PARAMETERS AND CONSTANTS--

     IFLAG   --  0.1000000E+01