String Compare

String Compare tests String A against String B using the selected comparison mode. The Result output indicates whether the comparison succeeded. The Index output reports the character position where the first match begins (zero-based), or -1 if there is no match.

In Contains mode, the Match Count output reports how many non-overlapping occurrences of String B exist within String A. In Regex mode, Match Count reports how many matches the pattern produces. For Equals, Starts With, and Ends With modes, Match Count is either 0 or 1.

The Case Sensitive toggle applies to all modes including Regex (when disabled, the regex is executed with case-insensitive flag).

Regex Mode

In Regex mode, String B is interpreted as a regular expression pattern. Standard regex syntax is supported, including character classes, quantifiers, anchors, and groups. Invalid regex patterns will produce no match (Result = false, Index = -1).

• Validate input format using regex to check that strings match expected patterns.
• Filter data streams by checking whether incoming strings contain a specific keyword.
• Route by prefix using Starts With mode to branch processing based on message types.
• File type detection using Ends With mode to check file extensions.
• Count occurrences of a substring within a larger body of text.
• Pattern extraction using regex to detect structured data like numbers, dates, or identifiers.

• The Index output is useful for downstream String Part operations when you need to extract content at or around the match position.
• In Regex mode, escape special characters with a backslash if you want to match them literally (e.g., "\\." to match a period).
• Use case-insensitive mode when processing user-generated or external data where casing is unreliable.
• The Match Count in Contains mode counts non-overlapping matches from left to right.
• Chain the Result output into a Logic node or conditional to build branching workflows.