[javascript] How to instantiate, initialize and populate an array in TypeScript?

I have the following classes in TypeScript:

class bar {
    length: number;
}

class foo {
    bars: bar[] = new Array();
}

And then I have:

var ham = new foo();
ham.bars = [
    new bar() {          // <-- compiler says Expected "]" and Expected ";"
        length = 1
    }
];

Is there a way to do that in TypeScript?

UPDATE

I came up with another solution by having a set method to return itself:

class bar {
    length: number;

    private ht: number;
    height(h: number): bar {
        this.ht = h; return this;
    }

    constructor(len: number) {
        this.length = len;
    }
}

class foo {
    bars: bar[] = new Array();
    setBars(items: bar[]) {
        this.bars = items;
        return this;
    }
}

so you can initialize it as below:

var ham = new foo();
ham.setBars(
    [
        new bar(1).height(2),
        new bar(3)
    ]);

If you would like to 'add' additional items to a page, you may want to create an array of maps. This is how I created an array of maps and then added results to it:

import { Product } from '../models/product';

products: Array<Product>;          // Initialize the array.

[...]

let i = 0;
this.service.products( i , (result) => {

    if ( i == 0 ) {
        // Create the first element of the array.
        this.products = Array(result);
    } else { 
        // Add to the array of maps.
        this.products.push(result);
    }

});

Where product.ts look like...

export class Product {
    id: number;
    [...]
}

A simple solution could be:

interface bar {
    length: number;
}

let bars: bar[];
bars = [];

If you really want to have named parameters plus have your objects be instances of your class, you can do the following:

class bar {
    constructor (options?: {length: number; height: number;}) {
        if (options) {
            this.length = options.length;
            this.height = options.height;
        }
    }
    length: number;
    height: number;
}

class foo {
    bars: bar[] = new Array();
}

var ham = new foo();
ham.bars = [
    new bar({length: 4, height: 2}),
    new bar({length: 1, height: 3})
];

Also here's the related item on typescript issue tracker.

An other solution:

interface bar {
    length: number;
}

bars = [{
  length: 1
} as bar];