What does the “ampersand, symbol” thingy as an argument to a ruby method actually do? It creates a proc. — What’s with this weird looking syntax with an ampersand and a symbol When &:object_id is used as an argument to a method call, it will convert the symbol :object_id into a Proc instance with the Symbol#to_proc method. This syntax is really useful when mixed with Enumerable methods such as map and select:

In this chapter we will write our own hash table. This will allow to remove uses of the Ruby Hash class and use our Dict class, built from scratch. — This article is part of a series, Redis in Ruby, originally published at https://redis.pjam.me/. All chapters are available on Medium as well: https://medium.com/@pierre_jambet What we’ll cover So far we’ve been using the Ruby Hash class as the main storage mechanism for the key/value pairs received through the SET command. We also use it…

In this chapter we will focus on making RedisServer speak the Redis Protocol, RESP. Doing so will allow us to use Redis’ built-in client, redis-cli to communicate with our own server. — This article is part of a series, Redis in Ruby, originally published at https://redis.pjam.me/. All chapters are available on Medium as well: https://medium.com/@pierre_jambet What we'll cover By the end of this chapter RedisServer will speak the Redis Protocol, RESP v2. Doing this will allow any clients that was written to communicate with the…

As I’m writing this, I’m finishing my fifth week of running after taking a five-week break, so things are starting to feel like they’re back to normal on that front. On the other hand, all the problems that were there before, racial injustice, and COVID being top of mind, are…

This article is part of a series, Redis in Ruby, originally published at https://redis.pjam.me/. All chapters are available on Medium as well: https://medium.com/@pierre_jambet What we’ll cover We implemented a simplified version of the SET command in Chapter 2, in this chapter we will complete the command by implementing all its options. …

A followup to the previous post about Railway Oriented Programming in Scala, adding support for parallel validations — Combining functions in parallel In the previous post we attempted to translate the main F# constructs from the original Railway Oriented Programming (ROP) documents — the blog posts & the slide deck — to Scala. We also showed what an alternative approach looks like using Scala’s built-in class. The code is on GitHub. …

Good morning runners! My last race was on March 1st, a little bit over four months ago now, and I’m starting to seriously miss it. There’s something special about the atmosphere in the corral, as you wait for the start of the race, shoulder to shoulder with a bunch of…

Intro A few years ago, a coworker introduced me to Railway Oriented Programming (ROP). At the time we were using Ruby, and while the ideas in ROP made a ton of sense, I didn’t really find a way to apply them to what I was working on. The lack of types…

This article is part of a series, Redis in Ruby, originally published at https://redis.pjam.me/. All chapters are available on Medium as well: https://medium.com/@pierre_jambet What we’ll cover In this chapter we will add support for efficient handling of multiple clients connected simultaneously. …