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Data Processing

Sorted Unique By

· Last updated：2026-01-27

Remove duplicates from a sorted array using lodash _.sortedUniqBy

Details

What this tool helps you do

Remove duplicates from a sorted array using a property path.

Highlights:

  • Uses lodash _.sortedUniqBy
  • Supports property paths (e.g. id, meta.key)
  • Returns unique values as JSON

Example:

  • Array: [{"id": 1}, {"id": 1}, {"id": 2}]
  • Path: id
  • Result: [{"id": 1}, {"id": 2}]

Execution

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Samples

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Written by the Elysia Tools team
Data Processing130
Array60
Lodash53

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Data Processing
Input types
textarea, text
Output type
text
Sample coverage
4
API ready
Yes

Overview

This tool removes duplicate entries from a pre-sorted array by comparing values at a specified property path, using the lodash _.sortedUniqBy function to return a unique JSON array.

When to use

  • When you have a sorted list of objects and need to eliminate duplicates based on a specific key or nested property.
  • To clean up data from APIs, databases, or exports where duplicates might occur in sorted order without re-sorting.
  • When preparing data for further processing, analysis, or display, ensuring uniqueness while maintaining the original sort sequence.

How it works

  1. 1Input a JSON array that is already sorted in ascending order.
  2. 2Specify the property path to compare for duplicates, such as 'id' or 'meta.key'.
  3. 3The tool applies lodash's _.sortedUniqBy to remove consecutive duplicate entries based on the path.
  4. 4Output the resulting unique array as JSON, preserving the sort order.

Use cases

  • Deduplicating user records from a sorted database export based on user ID.
  • Cleaning up sorted log entries by unique error codes or timestamps.
  • Processing sorted inventory lists to remove duplicate product SKUs for accurate reporting.

Examples

1. Deduplicate User Records

Data Analyst

Background

You have a sorted JSON array of user objects exported from a CRM system, sorted by registration date.

Problem

Duplicate user entries exist with the same 'userId' field, skewing analytics.

How to use

Paste the sorted array into the Array field and set the Property Path to 'userId'.

Outcome

A JSON array with unique user objects, ready for accurate analysis without duplicates.

2. Clean Sorted Product Inventory

Background

An e-commerce platform provides a product list sorted by SKU, but some entries are duplicated.

Problem

Duplicate SKUs need removal to ensure inventory counts are correct.

How to use

Input the sorted product array and specify 'sku' as the property path.

Outcome

A unique product list in JSON format, maintaining sort order for inventory management.

FAQ

What input format is required?

A JSON array that must be sorted before use.

Can I use nested property paths?

Yes, paths like 'meta.key' are supported for comparing nested values.

What if the array is not sorted?

The tool assumes sorted input; unsorted arrays may not produce correct results.

Is the output in JSON format?

Yes, the result is a JSON array of unique objects.

Do I need to install lodash?

No, the tool uses lodash internally; you only provide the input array and path.

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