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Type Inference

var number = 15;
var word = "Hello";
var strNumber = 15+" 1";

number.
word.
strNumber.

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basket = Reactive.List.cloud([], Template.table_item, Template.table_empty)
basket_summary = Reactive.List.clone(basket, Template.list_item, Template.list_empty)

items_initial = [ "item1", "item2" ]
items = items_initial ++ [ "item3", "item4 ]

function fill(_) { List.iteri({ function(i,v) basket.add(make_item(i,v), i) }, items_initial) }

function random() {
    cart_pos = Random.int(List.length(items_initial))

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Opa Binding

• Follow the tutorial: https://github.com/MLstate/opalang/wiki/Hello%2C-reCaptcha%2C-and-the-rest-of-the-world
• Read the source of the demo: https://github.com/MLstate/hello_recaptcha

Note: the demo uses the old bypass syntax, but you can use the new one with opa --js-bypass-syntax jsdoc (we will release it in a future version). Example: https://github.com/MLstate/opalang/blob/master/lib/plugins/opabsl/jsbsl/bslClient.js

3 plugins:

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    Server.start(
        Server.http,
        [ { register : { doctype : { html5 } } },
          { title : "hello", page : View.page }
        ]
    )

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How to run this example?

• Install OPA: http://opalang.org
• Compile: opa opa_hello.opa
• Run: ./opa_hello.exe

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How to run this example?

• Clone https://github.com/MLstate/opalang
• Install bld with make install-bld
• In the opalang root directory, compile opa_http_server.ml with bld opa_http_server.native
• Run it with _build/opa_http_server.native

Notes

You can disable:

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How to run this example?

• Clone https://github.com/MLstate/opalang
• Install bld with make install-bld
• In the opalang root directory, compile opa_scheduler.ml with bld opa_scheduler.native
• Run it with _build/opa_scheduler.native