Question

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)
    ]);

Answer 1

There isn’t a field initialization syntax like that for objects in JavaScript or TypeScript.

Option 1:

class bar {
    // Makes a public field called 'length'
    constructor(public length: number) { }
}

bars = [ new bar(1) ];

Option 2:

interface bar {
    length: number;
}

bars = [ {length: 1} ];