trellis
A simple Gleam library for pretty printing tabular data!
gleam add trellis@1
import trellis
pub fn main() {
let names = ["Michael", "Vitor", "Ellen"]
let data = {
use _ <- list.map(list.range(0, 10))
let assert Ok(name) = names |> list.shuffle |> list.first
let age = int.random(80)
let happy = int.random(2) |> int.is_even
Row(name:, age:, happy:)
}
trellis.table(data:)
|> trellis.style(style.Round)
|> trellis.with("name", Left, {
use Row(name:, age: _, happy: _) <- trellis.param
name
})
|> trellis.with("the person's age", Center, {
use Row(name: _, age:, happy: _) <- trellis.param
age |> int.to_string
})
|> trellis.with("senior", Right, {
use Row(name: _, age:, happy: _) <- trellis.param
{ age >= 65 } |> bool.to_string
})
|> trellis.with("happy", Right, {
use Row(name: _, age: _, happy:) <- trellis.param
case happy {
True -> "Happy"
False -> "Not Happy"
}
})
|> trellis.to_string
|> io.println
}
The output looks like:
╭───────────┬──────────────────┬────────┬───────────╮
│ name │ the person's age │ senior │ happy │
├───────────┼──────────────────┼────────┼───────────┤
│ Michael │ 16 │ False │ Not Happy │
│ Vitor │ 54 │ False │ Happy │
│ Ellen │ 63 │ False │ Not Happy │
│ Ellen │ 19 │ False │ Not Happy │
│ Vitor │ 28 │ False │ Happy │
│ Michael │ 59 │ False │ Not Happy │
│ Ellen │ 60 │ False │ Happy │
│ Vitor │ 60 │ False │ Not Happy │
│ Michael │ 74 │ True │ Happy │
│ Vitor │ 12 │ False │ Happy │
│ Ellen │ 16 │ False │ Happy │
╰───────────┴──────────────────┴────────┴───────────╯
Further documentation can be found at https://hexdocs.pm/trellis.
Development
nix develop # start dev shell
gleam run # Run the project
gleam test # Run the tests