Variable Scope
Elixir is lexically scoped. The basic unit of scoping is the function body. Variables defined in a function (including its parameters) are local to that function. In addition, modules define a scope for local variables, but these are only accessible at the top level of that module, and not in functions defined in the module.
Several Elixir structures also define their own scope. We’ll look at one of these, for, in Comprehensions. The other is with.
The with Expression
The with expression serves double duty. First, it allows you to define a local scope for variables: if you need a couple of temporary variables when calculating something, and don’t want those variables to leak out into the wider scope, use with. Second, it gives ...
Get Programming Elixir 1.3 now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
