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Designing Elixir Systems with OTP

Using with to Compose Uncertain Structures

Explore how to use the with construct to simplify composing uncertain data structures in Elixir. Understand how with helps separate success and error handling by allowing smooth validation and clearer code composition, especially in API layers dealing with user input and data validation.

We'll cover the following...

The logic of using with

The philosophy of with is simple. It allows us to specify pattern matches at each step of composition:

  • If the match succeeds, the composition proceeds.

  • If it fails, the composition halts and falls through to an else condition.

Here’s an ...