4 ms·

Real world use cases of F# which aren't pet projects and the empty set are equivalent.

JackMorgan 5y ago
I've worked for two different finance companies that are entirely on F#. One has huge customer bases and sells the product as on prem hosted solutions, the other hosts internally.
firlefans 5y ago
jet.com used it heavily for backend dev, grew quickly, were acquired by Walmart, 560million+ in funding: https://www.crunchbase.com/organization/jet https://www.crunchbase.com/organization/jet Even if you'd consider them the Jane Street of F#, it's a counterexample to your argument.
- thrower123 5y ago
  Hasn't Walmart rewritten all the Jet stuff in python and c# by now? At least that's what I was being told five years ago.
- pjmlp 5y ago
  How much of the jet.com code is still in use nowadays? Having been through a couple of merges during my lifetime, I guess "it depends".
- nojito 5y ago
  Not really. https://careers.walmart.com/us/jobs/WD635714-senior-software-engineer https://careers.walmart.com/us/jobs/WD635714-senior-software... >Top-notch programming skills, with an interest in functional programming languages. We use F# right now but are transitioning to Java. It's still used for the warehouse distribution team though
vmurthy 5y ago
> which aren't pet projects and the empty set are equivalent Wow. So much hubris in that sentence. I used to work with a startup in Sydney that still regularly uses F# for middleware/backend work. When I was there for 1.5 years, I saw the # of users of our product went up 3x but with very little delta in defects, rework etc. F# wasn't the only reason for this of course but it helped.
xboxnolifes 5y ago
We have F# in production.
dgudkov 5y ago
We've built a high-performance in-memory data transformation engine in F# and it works like a charm in thousands of installations around the world every day and supports business-critical processes in many organizations.
clausok 5y ago
I have been consulting at a world-renown hedge fund that has a lot of F# including nightly processes that have apparently been running for years with zero maintenance. You'll never hear them talk about it or see them at meet-ups though. The CTO is a bit of a maverick -- I'm not suggesting that this type of quiet adoption is common.
- throw868788 5y ago
  Sadly in my experience it is common for F# given its finance background at least historically, particularly in London/Europe. There is a culture of not showing your cards in these environments having worked in a few of them, and quietly being a success. Its an "arms race" with your competitors after all - only people in the industry jumping between companies have an idea what their other competitors are using often sometimes with "non-compete" clauses. Meetup's/conferences/articles showing your work are often explicitly banned or at best not encouraged by the companies for commercial reasons.

I've worked for two different finance companies that are entirely on F#. One has huge customer bases and sells the product as on prem hosted solutions, the other hosts internally.

firlefans 5y ago

jet.com used it heavily for backend dev, grew quickly, were acquired by Walmart, 560million+ in funding: https://www.crunchbase.com/organization/jet https://www.crunchbase.com/organization/jet Even if you'd consider them the Jane Street of F#, it's a counterexample to your argument.

thrower123 5y ago
Hasn't Walmart rewritten all the Jet stuff in python and c# by now? At least that's what I was being told five years ago.
pjmlp 5y ago
How much of the jet.com code is still in use nowadays? Having been through a couple of merges during my lifetime, I guess "it depends".
nojito 5y ago
Not really. https://careers.walmart.com/us/jobs/WD635714-senior-software-engineer https://careers.walmart.com/us/jobs/WD635714-senior-software... >Top-notch programming skills, with an interest in functional programming languages. We use F# right now but are transitioning to Java. It's still used for the warehouse distribution team though

vmurthy 5y ago

> which aren't pet projects and the empty set are equivalent Wow. So much hubris in that sentence. I used to work with a startup in Sydney that still regularly uses F# for middleware/backend work. When I was there for 1.5 years, I saw the # of users of our product went up 3x but with very little delta in defects, rework etc. F# wasn't the only reason for this of course but it helped.

xboxnolifes 5y ago

We have F# in production.

dgudkov 5y ago

We've built a high-performance in-memory data transformation engine in F# and it works like a charm in thousands of installations around the world every day and supports business-critical processes in many organizations.

clausok 5y ago

I have been consulting at a world-renown hedge fund that has a lot of F# including nightly processes that have apparently been running for years with zero maintenance. You'll never hear them talk about it or see them at meet-ups though. The CTO is a bit of a maverick -- I'm not suggesting that this type of quiet adoption is common.

throw868788 5y ago
Sadly in my experience it is common for F# given its finance background at least historically, particularly in London/Europe. There is a culture of not showing your cards in these environments having worked in a few of them, and quietly being a success. Its an "arms race" with your competitors after all - only people in the industry jumping between companies have an idea what their other competitors are using often sometimes with "non-compete" clauses. Meetup's/conferences/articles showing your work are often explicitly banned or at best not encouraged by the companies for commercial reasons.