Levenshtein Distance in Zoho Deluge (Because Why Not?)

Levenshtein Distance in Zoho Deluge (Because Why Not?)

Ever wanted to run a Levenshtein Distance algorithm inside Zoho Deluge? No? Me neither, but I did it anyway.

I built a fully functional fuzzy matching system inside Zoho, brute-forcing a dynamic programming solution using Maps and recursive list generation.

  • Does it scale? Not really.
  • Does it work? Absolutely.
  • Did I need to do this? Not at all, but it was fun.

I don’t even use this anymore because I found a better way around fuzzy matching for my needs, but hey, if you ever need a low volume Levenshtein calculator inside Zoho, now you have one. 🤷‍♂️

How It Works

The function computes Levenshtein Distance, a metric for fuzzy string similarity, by calculating the number of insertions, deletions, and substitutions needed to convert one string into another.

This method is commonly used in spell-checking, DNA sequencing, and fuzzy search algorithms—so obviously, I decided to implement it inside Zoho, because why not?

🔹 The Challenge: Zoho doesn’t support 2D arrays natively.
🔹 The Solution: I brute-forced it using Map-of-Maps as a manual matrix.
🔹 Bonus: I even used recursion to generate number sequences (which is completely unnecessary but kinda cool).

Code & Example Usage

Main Function: standalone.levenshteinDistance

📌 Input: {"s": "kitten", "t": "sitting"}
📌 Output: "3"

Code:

string standalone.levenshteinDistance(Map args)
{
// Retrieve input strings.
s = args.get("s");
t = args.get("t");
m = s.length();
n = t.length();
// If one string is empty, return the length of the other.
if(m == 0)
{
return n.toString();
}
if(n == 0)
{
return m.toString();
}
//info "Length of s: " + m.toString() + ", Length of t: " + n.toString();
// ------------------------------
// Get index lists via the helper function.
// The helper function standalone.UtilitygetListOfLength returns a comma-separated string.
// For example, if (m+1) is 5, it returns "0,1,2,3,4".
// ------------------------------
indices_m_str = standalone.UtilitygetListOfLength({"myLength":m + 1});
indices_n_str = standalone.UtilitygetListOfLength({"myLength":n + 1});
//info "indices_m_str: " + indices_m_str;
//info "indices_n_str: " + indices_n_str;
// Convert these comma-separated strings into lists of long values.
indices_m = list();
numList_m = indices_m_str.toList(",");
for each  numStr in numList_m
{
if(numStr.trim() != "")
{
indices_m.add(numStr.trim().toLong());
}
}
indices_n = list();
numList_n = indices_n_str.toList(",");
for each  numStr in numList_n
{
if(numStr.trim() != "")
{
indices_n.add(numStr.trim().toLong());
}
}
//info "indices_m list: " + indices_m.toString();
//info "indices_n list: " + indices_n.toString();
// ------------------------------
// Initialize matrix as a map-of-maps.
// Each row is a map keyed by the column index.
// ------------------------------
matrix = Map();
for each  i in indices_m
{
rowMap = Map();
for each  j in indices_n
{
rowMap.put(j,0);
}
matrix.put(i,rowMap);
}
// Set up the first column: matrix[i][0] = i.
for each  i in indices_m
{
rowMap = matrix.get(i);
rowMap.put(0,i);
}
// Set up the first row: matrix[0][j] = j.
firstRow = matrix.get(0);
for each  j in indices_n
{
firstRow.put(j,j);
}
// ------------------------------
// Compute Levenshtein distances.
// ------------------------------
for each  i in indices_m
{
if(i == 0)
{
continue;
}
for each  j in indices_n
{
if(j == 0)
{
continue;
}
// Determine cost: 0 if characters are the same, otherwise 1.
if(s.subString(i - 1,i) == t.subString(j - 1,j))
{
cost = 0;
}
else
{
cost = 1;
}
deletion = matrix.get(i - 1).get(j) + 1;
insertion = matrix.get(i).get(j - 1) + 1;
substitution = matrix.get(i - 1).get(j - 1) + cost;
minValue = deletion;
if(insertion < minValue)
{
minValue = insertion;
}
if(substitution < minValue)
{
minValue = substitution;
}
rowMap = matrix.get(i);
rowMap.put(j,minValue);
}
}
result = matrix.get(m).get(n);
//info "Levenshtein distance: " + result.toString();
return result.toString();
}

Recursive Helper Function: standalone.UtilitygetListOfLength

📌 Input: {"myLength": 6}
📌 Output: "0,1,2,3,4,5"

Code:

string standalone.UtilitygetListOfLength(Map args)
{
myLength = args.get("myLength");
//info "Input myLength: " + myLength;
if(myLength == null || myLength <= 0)
{
//info "Base case reached (myLength <= 0). Returning empty string.";
return "";
}
else
{
// Recursively get the string for (myLength - 1)
prevStr = standalone.UtilitygetListOfLength({"myLength":myLength - 1});
//info "Previous string returned for myLength " + (myLength - 1).toString() + ": " + prevStr;
if(prevStr.equals(""))
{
result = "0";
}
else
{
result = prevStr + "," + (myLength - 1).toString();
}
//info "Returning result for myLength " + myLength.toString() + ": " + result;
return result;
}
}

This helper function is completely unnecessary, but I made it anyway. Instead of just looping, it recursively builds a CSV string of numbers—which is both inefficient and hilarious. 😆

Why Did I Do This?

Because it wasn't supposed to work—but it does.

  • Zoho doesn’t support Levenshtein distance? I built it anyway.
  • Zoho doesn’t have fuzzy matching? Now it does.
  • Zoho doesn’t support 2D arrays? I brute-forced a matrix using Maps.
  • Does this scale for massive data? Nope, but it’s perfect for low-volume cases.

Thoughts? Ideas? Have you ever done something in Zoho just because you wanted to see if it was possible? Let me know. 😆

TL;DR:

📌 I brute-forced Levenshtein Distance into Zoho
📌 Zoho wasn’t built for this, but I made it work anyway
📌 Does it scale? No. Does it work? Yes.
📌 Do I use it? Nope. Was it fun? Absolutely.

Let me know what you think! 🚀


    • Sticky Posts

    • Kaizen #222 - Client Script Support for Notes Related List

      Hello everyone! Welcome to another week of Kaizen. The final Kaizen post of the year 2025 is here! With the new Client Script support for the Notes Related List, you can validate, enrich, and manage notes across modules. In this post, we’ll explore how

    • Kaizen #217 - Actions APIs : Tasks

      Welcome to another week of Kaizen! In last week's post we discussed Email Notifications APIs which act as the link between your Workflow automations and you. We have discussed how Zylker Cloud Services uses Email Notifications API in their custom dashboard.

    • Kaizen #216 - Actions APIs : Email Notifications

      Welcome to another week of Kaizen! For the last three weeks, we have been discussing Zylker's workflows. We successfully updated a dormant workflow, built a new one from the ground up and more. But our work is not finished—these automated processes are

    • Kaizen #152 - Client Script Support for the new Canvas Record Forms

      Hello everyone! Have you ever wanted to trigger actions on click of a canvas button, icon, or text mandatory forms in Create/Edit and Clone Pages? Have you ever wanted to control how elements behave on the new Canvas Record Forms? This can be achieved

    • Kaizen #142: How to Navigate to Another Page in Zoho CRM using Client Script

      Hello everyone! Welcome back to another exciting Kaizen post. In this post, let us see how you can you navigate to different Pages using Client Script. In this Kaizen post, Need to Navigate to different Pages Client Script ZDKs related to navigation A.

    Nederlandse Hulpbronnen


      • Recent Topics

      • Why am I seeing deleted records in Zoho Analytics syncing with Zoho CRM?

        I have done a data sync between Zoho CRM and Zoho Analytics, and the recycle bin is empty. Why do I see deleted leads/deals/contacts in Zoho Analytics if it doesn't exist in Zoho CRM? How can I solve this problem? Thanks

      • Zoho Tables is now live in Australia & New Zealand!

        Hey everyone! We’ve got some great news to share — Zoho Tables is now officially available in the Australian Data Center serving users across Australia and New Zealand regions! Yes, it took us a bit longer to get here, but this version of Zoho Tables

      • Custom Fonts in Zoho CRM Template Builder

        Hi, I am currently creating a new template for our quotes using the Zoho CRM template builder. However, I noticed that there is no option to add custom fonts to the template builder. It would greatly enhance the flexibility and branding capabilities if

      • Introducing the Zoho Projects Learning Space

        Every product has its learning curve, and sometimes having a guided path makes the learning experience smoother. With that goal, we introduce a dedicated learning space for Zoho Projects, a platform where you can explore lessons, learn at your own pace,

      • All new Address Field in Zoho CRM: maintain structured and accurate address inputs

        The address field will be available exclusively for IN DC users. We'll keep you updated on the DC-specific rollout soon. It's currently available for all new sign-ups and for existing Zoho CRM orgs which are in the Professional edition. Latest update

      • Create PO from an invoice

        We are a hardware and software sales company which receives orders over the internet. We drop ship most of our products from a warehouse outside of our company. Our orders get sync'd into Zoho from our store via onesaas as invoices. It would be great

      • Import Function: ONLY update empty fields

        When setting up an import from a spreadsheet to CRM, there is a checkbox "Don't update empty values for existing contacts" (see screenshot below). While I see some limited benefit from this functionality, I think there should also be an "ONLY update empty

      • Collaboration with customers made easy with Zoom Meeting and Zoho Desk integration

        Hello everyone! We are happy to announce that you can now integrate your Zoho Desk account with Zoom Meeting. The integration bridges the gap between digital communication and human connection, empowering teams to deliver timely support when it matters

      • CRM Canvas - Upload Attachments

        I am in the process of changing my screens to Canvas.  On one screen, I have tabs with related lists, one of which is attachments.  There doesn't appear to be a way to upload documents though.  Am I missing something really obvious?  Does anyone have

      • TrueSync regularly filling up my local disk

        Seems that WorkDrive's TrueSync randomly starts filling up my local hard drive space. None of the folders have been set as "Make Offline" but still it seems to randomly start making file offline. The settings of the app is so minimal and is of no real

      • Kaizen #194 : Trigger Client Script via Custom buttons

        Hello everyone! Welcome back to another interesting and useful Kaizen post. We know that Client Scripts can be triggered with Canvas buttons and we discussed this with a use case in Kaizen#180. Today, let us discuss how to trigger Client Script when a

      • [Webinar] A recap of Zoho Writer in 2025

        Hi Zoho Writer users, We're excited to announce Zoho Writer's webinar for January 2026: A recap of Zoho Writer in 2025. This webinar will provide a recap of the features and enhancements we added in 2025 to enhance your productivity. Choose your preferred

      • Picklist field shows "none" as default

        Hello, Is there an option to avoid showing "none" as the default value in a picklist field? I also don't want to see any option displayed. My expectation is to have a blank bar, and then when I display the drop-down list, I can choose whichever I wa

      • Stage-probability mapping feature in custom module

        Hi, I'm building a custom module for manage projects. I would like to implement the stage-probability feature that Potentials has. Is this possible?

      • Create static subforms in Zoho CRM: streamline data entry with pre-defined values

        Last modified on (9 July, 2025): This feature was available in early access and is currently being rolled out to customers in phases. Currently available for users in the the AU, CA, and SA DCs. It will be enabled for the remaining DCs in the next couple

      • Field Description is very small

        Hello, The field Description in the activity is very small. Why don't try open a new window, or a bigger popup, or increase the width of the "popup". Example:

      • StatusIQ

        Please add StatusIQ to data sources. We using site24x7 and StatusIQ together and site24x7 integration is already there. Thanks and regards, Torsten

      • In Zoho People, the Operations buttons are frequently not visible or do not appear consistently.

        In Zoho People, the Operations buttons are frequently not visible or do not appear consistently. We request you to please investigate and address this issue, as it is affecting daily HR operations and user access.

      • Marketing Tip #14: Increase cart value with product bundles

        Bundling products is a great way to increase average order value while giving customers more convenience. Think “camera + tripod + memory card” or “soap + lotion + bath salts.” Bundles make shopping easier and feel like a better deal. It’s a win-win for

      • Problem with Workdrive folders

        I'm having a problem a problem accessing files in a Zoho work drive folder when using the Zoho writer app. The problem folder appears grayed out in the Zoho work drive window in both the online and writer application. However I can open the folder in

      • Sortie de Zoho TABLE ??

        Bonjour, Depuis bientôt 2 ans l'application zoho table est sortie en dehors de l'UE ? Depuis un an elle est annoncée en Europe Mais en vrai, c'est pour quand exactement ??

      • Add RTL and Hebrew Support for Candidate Portal (and Other Zoho Recruit Portals)

        Dear Zoho Recruit Team, I hope you're doing well. We would like to request the ability to set the Candidate Portal to be Right-to-Left (RTL) and in Hebrew, similar to the existing functionality for the Career Site. Currently, when we set the Career Site

      • Auto tracking URL generation based on Carrier

        Hi, While creating a shipment order for a package in Zoho Books, I have a requirement that for example, if the carrier is Delhivery and tracking number is 1234, then can automatically the tracking link/URL be generated as www.delhivery.com/1234. Similary,

      • Helper Functions and DRY principle

        Hello everyone, I believe Deluge should be able to use 'Helper functions' inside the main function. I know I can create different standalones, but this is not helpful and confusing. I don't want 10000 different standalones, and I dont want to have to

      • Pre-orders at Zoho Commerce

        We plan to have regular producs that are avaliable for purchase now and we plan to have products that will be avaliable in 2-4 weeks. How we can take the pre-orders for these products? We need to take the money for the product now, but the delivery will

      • Customer ticket creation via Microsoft Teams

        Hi all, I'm looking to see if someone could point me in the right direction. I'd love to make it so my customers/ end users can make tickets, see responses and respond within microsoft teams. As Admin and an Agent i've installed the zoho assist app within

      • Zoho Books' 2025 Wrapped

        Before we turn the page to a new year, it’s time to revisit the updates that made financial management simpler and more intuitive. This annual roundup brings together the most impactful features and enhancements we delivered in 2025, offering a clear

      • Add specific field value to URL

        Hi Everyone. I have the following code which is set to run from a subform when the user selects a value from a lookup field "Plant_Key" the URL opens a report but i want the report to be filtered on the matching field/value. so in the report there is

      • Can multiple agents be assigned to one ticket on purpose?

        Is it possible to assign one ticket to two or more agents at a time? I would like the option to have multiple people working on one ticket so that the same ticket is viewable for those agents on their list of pending tickets. Is something like this currently

      • Zoho removed ability to see all Scheduled Reports!

        If you are not the owner of a scheduled report, Zoho recently removed the capability to see each scheduled report. As an admin who relies on seeing all scheduled reports being sent, this is a terrible update. Now I cannot see ANY scheduled reports...even the ones I am being sent!!  This should be a setting for admins to control.  This is a bad update.

      • This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details

        Hi Team, when I,m trying to create a email account (imagixmidia.com.br) it's showing this error >>  This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details plz help me  thanks

      • Edit default "We are here to help you" text in chat SalesIQ widget

        Does anyone know how this text can be edited? I can't find it anywhere in settings. Thanks!

      • Feature Request: Sync Leave Tracker to Zoho Mail / Calendar or provide option to download information

        Zoho Leave Tracker offers the option to sync the leave Calendar to Microsoft 365 and Google Calendar. Adding an option to sync to Zoho-Mail Calendar would avoid duplication and add significant value for users. An alternative would be to allow users to

      • Compensation | Salary Packages - Hourly Wage Needed

        The US Bureau of Labor Statistics says 55.7% of all workers in the US are paid by the hour. I don't know how that compares to the rest of the world, but I would think that this alone would justify the need for having an hourly-based salary package option.

      • Multiple currencies - doesn’t seem to work for site visitors / customers

        I am trying to understand how the multiple currency feature works from the perspective of the website visitor who is shopping on my Zoho Commerce site. My site’s base currency is US Dollars (USD) but my store is for customers in Costa Rica and I would

      • Archiving Contacts

        How do I archive a list of contacts, or individual contacts?

      • How do people handle using Outlook and Zoho Project calendar at the same time?

        We have an ongoing problem in our organisation where we use Zoho Projects to plan all of our projects tasks and that also allows us to look forward using the workload report to see which of our consultants are overstretched etc and which are available.

      • 10GB Email Storage Limits in Zoho CRM

        We’ve had Zoho One for almost 5 years and have always synced our emails from Gmail via IMAP… As of late, we’ve run into issues with our emails not syncing, due to being over the 10GB storage cap… What’s very odd is that we haven’t changed a thing? I know

      • Performance is degrading

        We have used Mail and Cliq for about three years now. I used to use both on the browser. Both have, over the past 6 months, had a severe degradation in performance. I switched to desktop email, which appeared to improve things somewhat, although initial

      • How to set page defaults in zoho writer?

        hi, everytime i open the zoho writer i have to change the default page settings to - A4 from letter, margins to narrow and header and footer to 0. I cannot set this as default as that option is grayed out! so I am unable to click it. I saved the document

      • Next Page