FINDNEXT Function

Continues to search the string for the next match after using the FINDNEXT() function.

Category:	Regular Expression
Returned data type:	Boolean

Syntax

Required Argument

Details

Example

Syntax

r.FINDNEXT(input)

Required Argument

input

specifies the string value in which you want to search for the pattern defined by your compiled regular expression. This can be an explicit string ("MyValue"). This can also be a variable already defined in your expression code or passed to your expression node as a column from a previous node (MyValue or "My Value").

Requirement

input must not be NULL or blank.

Details

The FINDNEXT function indicates that another pattern match has been found after FINDFIRST() has been used. Using a "While" statement loop lets you iterate through all potential pattern matches using this function as long as the return value is equal to true.

The function returns TRUE if a pattern match was found. Otherwise, it returns FALSE.

Example

Note: This example can be run in a stand-alone expression node if the Generate rows when no parent is specified option is selected. If passing data to this node, turn this setting off and remove the SETEOF( ) function. The PUSHROW statements are also unnecessary if passing data values in to the node as data rows. Unless stated otherwise, all code shown should be entered in the Expression tab of the Expression node.

// Define some string variables
string MyString
string MySubString
 
// Set one to some sample input
MyString = "DwAwTxAxFyLyUzXz"
 
//You must define a regex object
regex r
// Then compile your regular expression
// This one will match any single uppercase letter
r.compile("[A-Z]")
// Find the first pattern match
if r.findfirst(MyString)
   begin
   // Pull the pattern from MyString and place it into MySubString
   MySubString = mid(MyString, r.matchstart(),r.matchlength())
   // Use pushrow to create new rows - this is purely for the sake of
   // clarity in the example
   pushrow()
   // Create a while loop that continues to look for matches
   while r.findnext(MyString)
      begin
      // Pull the pattern from MyString and place it into MySubString agin
      MySubString = mid( MyString, r.matchstart(),r.matchlength())
      // Just for display again
      pushrow()
      end
   end
// Terminate the expression node processing
seteof(true)
// Prevent the last pushrow() from showing up twice
return false