Table of Contents

Formulas - Array

If this is your first time using Formulas, please check our Getting Started guide here and our crash course here

The Formulas block is a great way to easily manipulate your existing Arrays. Use this guide to understand which formulas you can use with your existing Arrays - you will be able to check whether a particular item is present in a list of products, pull data from a list when the user requests it in your chatbot flow and many more uses.

Formulas available

  • Contains
  • GetValue
  • IndexOf
  • Length
  • List
  • Slice
  • Push
  • Splice

Contains

Check if array @products = ["chair","table","sofa","lamp"] contains "table"
Contains(@products,"table")

GetValue

Get the first value from array @products
GetValue(@products,0)
Keep in mind that the index of objects in array starts from 0

IndexOf

Check the position of "sofa" in array @products

IndexOf(@products,"sofa")

Length

Check the length of array @products
Length(@products)

List

Create an array out of different strings
List(@userinput1,@userinput2,@userinput3)

Slice

Extract first two elements from array @products
Slice(@products,0,2)
Delete first {} from an array (example @array = [{}, 'Product 1', 'Product 2']

Slice(@array,1)

Push

Add last user input to array @product
Push(@products,@lastinput)

Splice

Join 2 arrays

In case we want to join 2 arrays: @arrayone = ["one","two","three"] and @arraytwo = ["four","five"] and create a new array that will be called @finalarray:

Splice(@arrayone,Length(@arrone),0,@arraytwo)
Delete an element of an array based on a user selection.

This example is useful if you want to let the user "discard" options

If we want to delete a specific element from an array (we will use @array for the example), we don't know the position yet, but we will search for it and then delete it.

The element that we want to delete is stored in the variable @userselection

So, we have the @array = ["one","two","three"], and if the @userselection is "two", what we want to have at the end is @array = ["one","three"]

Here is the formula:

Splice(@array,IndexOf(@array,@userselection),1)

Here is an example:

How did we do?

Formulas - Comparison

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