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Examples

Hello World

Create a file named hello-world.mel, and write this code:

#!/usr/bin/env melodium
#! name = hello_world
#! version = 0.1.0
#! require = std:0.10.*
    
use std/engine/util::startup
use std/engine/log::logInfoMessage
    
treatment main() {
    startup()
    logInfoMessage(message = "Hello World!")
    
    startup.trigger -> logInfoMessage.trigger
}

Then run it using melodium run hello-world.mel.

$ melodium run hello-world.mel
[2012-12-21T01:32:45.678Z] info: info: Hello World!

Hello World (as project)

Create raw project using melodium new hello-world.

$ melodium new hello-world
success: program 'hello_world' created in 'hello-world'
hello-world
├── Compo.toml
└── lib-root.mel

In lib-root.mel file, put the following code:

use std/engine/util::startup
use std/engine/log::logInfoMessage
    
treatment main() {
    startup()
    logInfoMessage(message = "Hello World!")
    
    startup.trigger -> logInfoMessage.trigger
}

In Compo.toml, add the entries:

[entrypoints]
main = "hello_world::main"

Run it with melodium run hello-world/Compo.toml:

$ melodium run hello-world/Compo.toml
[2012-12-21T01:32:45.678Z] info: info: Hello World!

Download

Create raw project using melodium new download.

$ melodium new download
success: program 'download' created in 'download'

In lib-root.mel file, put the following code:

use fs/local::writeLocal
use http/client/util::get
use std/engine/util::startup
use std/engine/log::logError
 
treatment download(url: string, file: string)
{
    startup()
    get(url=url)
    writeLocal(path=file)
    logError()
 
    startup.trigger -> get.trigger,data -> writeLocal.data
                       get.error --------> logError.message
}

In Compo.toml, add the entries:

[dependencies]
std = "^0.10.0"
fs = "^0.10.0"
http = "^0.10.0"
 
[entrypoints]
main = "download::download"

Run it with melodium run download/Compo.toml --url https://melodium.tech/img/voyage.jpeg --file nantes.jpeg

More Examples

Note

More examples for different applications can be found on the playground  of Cadence.CI.

Usage