.. _auto_string_starts_with:

*CHECKS IF A STRING STARTS WITH A GIVEN SUBSTRING*
==================================================

Checks whether a string (haystack) begins with a specified substring (needle) and returns a boolean result. Use this worker in workflow branches where routing or filtering logic depends on a string prefix match.

When to use
-----------

Classification: **process**.

Tagged: ``boolean``, ``match``, ``prefix``, ``process``, ``scalar``, ``starts_with``, ``string``, ``text``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Haystack
     - haystack
     - scalar
     - —
     - ✓
     - The full string to inspect; provide any scalar text value that you want to test for a leading substring.
   * - Needle
     - needle
     - scalar
     - —
     - ✓
     - The prefix substring to look for at the start of the haystack; treated as a literal string (quote=1).

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - string_starts_with_output_1
     - string_starts_with_output_1
     - scalar
     - Boolean-like scalar result (true/false) indicating whether the haystack string begins with the needle substring.

Disciplines
-----------

- platform.workflow

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=string_starts_with <https://www.d3view.com/api/workflow/example?id=string_starts_with>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>string_starts_with</code>. Schema hash: <code>95029ab82dc8</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>