Typescript: Is there a simple way to convert an array of objects of one type to another

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You haven’t showed enough of your code, so I’m not sure how you instantiate your classes, but in any case you can use the array map function:

class Item {
    name: string;
    desc: string;
    meta: string
}

class ViewItem {
    name: string;
    desc: string;
    hidden: boolean;

    constructor(item: Item) {
        this.name = item.name;
        this.desc = item.desc;
        this.hidden = false;
    }
}

let arr1: Item[];
let arr2 = arr1.map(item => new ViewItem(item));

(code in playground)

Edit

This can be shorter with Object.assign:

constructor(item: Item) {
    Object.assign(this, item);
}

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