List Unique Values Tool

Remove duplicate strings while preserving first occurrence order.

Description

Remove duplicate strings while preserving first occurrence order.

List Unique Values Tool: Remove duplicate strings while preserving first occurrence order.

When to use List Unique Values

Use this list operation for a deterministic sequence transformation or summary when item equality, numeric ordering, and mutation expectations are explicit.

Values
Required list input.

How List Unique Values works

Remove duplicate strings while preserving first occurrence order. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1

Unique values
The resulting unique values returned as a list.

Limitations and assumptions

  • Results depend on stable ordering, comparison rules, duplicate and missing-value treatment, rotation convention, numeric parsing, and whether nested values are copied or referenced.
  • Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Alternative or Complementary approaches

Test empty, singleton, duplicate, negative, and heterogeneous inputs, and retain the source list when reversibility matters.

References

  1. List (abstract data type) — Wikipedia contributors

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