Language Feature

The following features supported by only ReoScript are non-compatible to ECMAScript/JavaScript standard.

More simpler inheriting based on prototype mechanism

This feature is planned to implement in next release.

function A() {
  this.a = 10;
}

function B() : A() {
  this.b = 20;
}

var b = new B;
console.log(b.a + b.b);

The output is:

30

Lambda Expression and Enhanced Collection Operations

Lambda based where, sum, min, max and etc. are available in Array operations.

var arr = [1, 5, 7, 8, 10, 13, 20, 24, 26];
var result = arr.where(n => n < 10).sum();

The result is:

21

See Lambda Expression.

setTimeout and setInterval supported to pass arguments

function check_alive(user) {
    if (...) {
        return 'ok';
    } else {
        setTimeout(check_alive, 1000, user);
    }
}

var user = getCurrentUser();
setTimeout(check_alive, 1000, user);

See Enhanced Async-Calling.

Import script file into current script context

common.rs:

function check_login(usr, pwd) {
    return (usr.password == hashed(pwd));
}

login.rs:

import "common.rs";

var usr = getCurrentUser();
check_login(usr, getInputtedPwd());

See import keyword.

Using CLR

The classes in .NET Common Language Runtime are available to script by using DirectAccess.

Initailizer

Initializer used to simplify the code by merging construction and property setting:

var newApple = new Apple() {
    color : 'red',
};

It is same as:

var newApple = new Apple();
newApple.color = 'red';

See Constructor and Initializer.

Binary literal supported (e.g. 0b1010)

var num = 0b1010;
console.log(num);

The output is:

10