Find the First or Last Index Position of Array Item with JavaScript Code Step

  • 26 May 2022
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Find the First or Last Index Position of Array Item with JavaScript Code Step
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The Purpose

Find the first and/or last index position of an item in an array.

  • Use indexOf() to get the first index position for a value.
  • Use lastIndexOf() to get the last index position for a value.

NOTE: Both methods will return -1 if the value is not found.

How to Configure

Copy the Code

let A1 = inputData.A1.split(","); // splits by the comma delimiter to create an array
let Find = inputData.Find; // value to find in the array

let IndexFirst = A1.indexOf(Find); // finds the first index position
let IndexLast = A1.lastIndexOf(Find); // finds the last index position

output = [{IndexFirst, IndexLast, A1}];

The Results

NOTE: Index positions start at 0!

Contribution by Troy Tessalone

Troy is a Certified Zapier Expert who automates workflows with no-code and low-code apps to help clients save time and make money.


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