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Zip Arrays

Combine arrays by index using lodash _.zip

Group elements by index across multiple arrays.

Highlights:

  • Uses lodash _.zip
  • Accepts 2-4 JSON arrays
  • Missing values are filled with null

Example:

  • Array 1: ["a", "b"]
  • Array 2: [1, 2]
  • Result: [["a", 1], ["b", 2]]

Enter a JSON array

Enter a JSON array

Optional third array

Optional fourth array

Key Facts

Category
Data Processing
Input Types
textarea
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The Zip Arrays tool allows you to merge multiple JSON arrays by their index, creating a new array of grouped elements using the reliable lodash _.zip logic.

When to Use

  • •When you need to pair corresponding data points from separate lists into a single structured format.
  • •When you are preparing data for visualization or API consumption that requires grouped key-value pairs.
  • •When you need to align datasets of equal or unequal length where missing values should be explicitly marked as null.

How It Works

  • •Input your primary data arrays into the provided fields, supporting up to four separate JSON arrays.
  • •The tool processes the inputs by matching elements at each index position across all provided arrays.
  • •The output generates a nested array where each sub-array contains the elements found at that specific index.
  • •If one array is shorter than the others, the tool automatically fills the missing positions with null values.

Use Cases

Merging a list of user IDs with their corresponding email addresses into a single list of pairs.
Synchronizing timestamp arrays with sensor reading arrays for time-series data analysis.
Combining product names, prices, and stock quantities into a unified inventory structure.

Examples

1. Merging User Data

Data Analyst
Background
I have two separate lists: one containing user names and another containing their respective account IDs.
Problem
I need to combine these into a single list of pairs to import into a database.
How to Use
Paste the names array into Array 1 and the IDs array into Array 2, then run the tool.
Example Config
Array 1: ["Alice", "Bob"], Array 2: [101, 102]
Outcome
[["Alice", 101], ["Bob", 102]]

2. Aligning Uneven Datasets

Developer
Background
I am processing two arrays where the second array is missing a value for the final entry.
Problem
I need to maintain the index structure without breaking the alignment of the data.
How to Use
Input the arrays into the tool; it will automatically handle the length mismatch.
Example Config
Array 1: ["A", "B", "C"], Array 2: [1, 2]
Outcome
[["A", 1], ["B", 2], ["C", null]]

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FAQ

What happens if my arrays have different lengths?

The tool will continue to group elements until the longest array is exhausted, filling any missing indices in shorter arrays with null.

How many arrays can I zip at once?

You can provide between two and four JSON arrays to be combined simultaneously.

Is the input format strictly JSON?

Yes, the tool expects valid JSON array syntax, such as ["a", "b"] or [1, 2, 3].

Does this tool use standard library functions?

Yes, it utilizes the lodash _.zip function to ensure consistent and predictable grouping behavior.

Can I use this for non-string data?

Yes, the tool supports any valid JSON data types, including numbers, booleans, and strings within your arrays.

API Documentation

Request Endpoint

POST /en/api/tools/zip-arrays

Request Parameters

Parameter Name Type Required Description
array1 textarea Yes Enter a JSON array
array2 textarea Yes Enter a JSON array
array3 textarea No Optional third array
array4 textarea No Optional fourth array

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-zip-arrays": {
      "name": "zip-arrays",
      "description": "Combine arrays by index using lodash _.zip",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=zip-arrays",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]