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
-
List (abstract data type) — Wikipedia contributors
Similar or alternative tools
- Combinations Generator
Generate all k-sized combinations of a list in deterministic lexicographic order.
- Dataset Consecutive Differences Tool
Compute the pairwise differences between consecutive dataset values.
- List Frequency Counter
Count occurrences of strings in a list.