has_substring/2—verify the occurrence of a substring within a string or list of strings

The has_substring/2 function verifies the occurrence of a substring within a string or list of strings. The syntax for has_substring/2 function is as follows:

has_substring($STRING,$SUBSTRING)
has_substring($LIST,$SUBSTRING)

has_substring/2 syntax argument

Argument	Mode	Type	Description
$STRING	Input	STRING	String that you want to test for a specified substring
$LIST	Input	LIST_OF STRING	List of strings that you want to test for a specified substring
$SUBSTRING	Input	STRING	Substring that you want to search for

Use the has_substring/2 to determine whether the string specified by $STRING has the value of $SUBSTRING as a substring or to determine whether at least one of the strings of the list specified by $LIST has the value of $SUBSTRING as a substring.

The has_substring/2 primitive succeeds or fails depending on whether or not the substring occurs.

has_substring/2 example

if ( has_substring($E.msg,NGP) ) ...

This example searches the msg slot of the event being processed to determine if the slot has NGP as a substring, in upper case.