Grid

The # operator -- also known as the Grid operator -- is used to iterate over the following types:

Syntax:

expression # {
  patterns
}

For each item in the input, the grid operator will generate an (index, item) tuple. The index field is an int, and the item field's type depends on the input type. If only one capture variable is mapped, its type will be (int, _). If you provide an index variable and item variable, it will be destructured to those variables accordingly.

Example:

[1, 2, 3] # {
  i, n => print(`Item {i} = {n}`)
}