The with Expression
Explore the with expression in Elixir to manage local variable scope and handle pattern matching failures gracefully. This lesson teaches you how to control execution flow and avoid errors using with in practical coding examples.
We'll cover the following...
We'll cover the following...
The with expression serves double duty.
- First, it allows us to define a local scope for variables. If we need a couple of temporary variables when calculating something, and we don’t want those variables to leak out into the wider scope, we use with.
- Second, it gives us some control over pattern-matching failures.
The following code finds the values for the _lp user.
content = "Now is the time"
lp = with {:ok, file} =