public/subjects/flags/README.md

## flags

### Instructions

Write a **program** that can have as arguments `--insert` (or `-i`), `--order` (or `-o`) and a `string`.

This program should :

- Insert the string given to the `--insert` (or `-i`), in the `string` argument, if given.
- Order the `string` argument (in ASCII order) if given the flag `--order` (or `-o`).
- In case there are no arguments or if the flag `--help` (or `-h`) is given, it should print the options, as shown in the example.

Example of output :

```console
$ go run . --insert=4321 --order asdad
1234aadds
$ go run . --insert=4321 asdad
asdad4321
$ go run . asdad
asdad
$ go run . --order 43a21
1234a
$ go run .
--insert
  -i
    This flag inserts the string into the string passed as argument.
--order
  -o
    This flag will behave like a boolean, if it is called it will order the argument.
$
$ go run . -h
--insert
  -i
    This flag inserts the string into the string passed as argument.
--order
  -o
    This flag will behave like a boolean, if it is called it will order the argument.
$
$ go run . --help
--insert
  -i
    This flag inserts the string into the string passed as argument.
--order
  -o
    This flag will behave like a boolean, if it is called it will order the argument.
$
```