Gleam stdlib example not working : reference : https://hexdocs.pm/gleam_stdlib/index.html

[functonal]

As usual :
gleam new gleam_stdlib_project
cd gleam_stdlib_project

import gleam/string
import gleam/list.{contains}

fn usage() {
  string.append("str", "ing")
}

fn more_usage() {
  [1, 2, 3]
  |> contains(any: 2)
}

No pub fn main() here..

Will it compile and test : No
The results are :
A.

➜  gleam_stdlib_project gleam test
  Compiling gleam_stdlib_project

warning: Unused private function
  ┌─ ./src/gleam_stdlib_project.gleam:4:1
  │
4 │ fn usage() {
  │ ^^^^^^^^^^ This private function is never used.

Hint: You can safely remove it.

warning: Unused private function
  ┌─ ./src/gleam_stdlib_project.gleam:7:1
  │
7 │ fn more_usage() {
  │ ^^^^^^^^^^^^^^^ This private function is never used.

Hint: You can safely remove it.
Compiled in 1.30s
Running gleam_stdlib_project_test.main
.
Finished in 0.012 seconds
1 tests, 0 failures

B.

gleam_stdlib_project gleam run
  Compiling gleam_stdlib_project

warning: Unused private function
  ┌─ ./src/gleam_stdlib_project.gleam:7:1
  │
7 │ fn more_usage() {
  │ ^^^^^^^^^^^^^^^ This private function is never used.

Hint: You can safely remove it.

warning: Unused private function
  ┌─ ./src/gleam_stdlib_project.gleam:4:1
  │
4 │ fn usage() {
  │ ^^^^^^^^^^ This private function is never used.

Hint: You can safely remove it.
Compiled in 1.07s
Running gleam_stdlib_project.main
exception error: undefined function gleam_stdlib_project:main/0%

So no main() no invoke ,will not compile and can not run test.

The example is incomplete....given on this link https://hexdocs.pm/gleam_stdlib/index.html
How to rectify this �: I want to use both the private functions usage() and more_usage()
and moreover want to invoke them from Erlang shell via gleam shell..

Could you shed some light on it...

Thanks

[functonal]

I found the answer to this : Gleam stdlib example not working : reference : https://hexdocs.pm/gleam_stdlib/index.html
#1483

The answer is very simple : I have to use
using keyword pub (from my little bit of Rust Knowledge)

So the code from https://hexdocs.pm/gleam_stdlib/index.html changed to >>
import gleam/string
import gleam/list.{contains}

pub fn usage() {
string.append("str", "ing")
}
pub fn more_usage() {
[1, 2, 3]
|> contains(any: 2)

}

and the results are :
➜ gleam_stdlib_project gleam test
Compiling gleam_stdlib_project
Compiled in 1.28s
Running gleam_stdlib_project_test.main
.
Finished in 0.010 seconds
1 tests, 0 failures
➜ gleam_stdlib_project gleam run
Compiling gleam_stdlib_project
Compiled in 0.74s
Running gleam_stdlib_project.main
exception error: undefined function gleam_stdlib_project:main/0. // The Erlang backend
and the erlang shell from gleam:
1> gleam_stdlib_project:usage().
<<115,116,114,105,110,103>>
2> gleam_stdlib_project:more_usage().
true

//Fine but no main()...

My question is How to make it completely correct program and how to use the main() here ?
Please shed some light on it.

Thanks

[lpil]

That's right, you'll need to use the keyword pub to make things public. These docs may help: https://gleam.run/book/tour/functions.html

My question is How to make it completely correct program and how to use the main() here ?

I'm not sure what you mean, it would depend what your program is intended to do. The main function is called first, so any functionality your program should have will be written there.