TypeScript

distinct-array.ts

const distinct = subjects.filter(
    (thing, i, arr) => arr.findIndex(t => t.INN === thing.INN) === i
);

// IE version
const distinctThings = thingsWithDuplicates.filter((thing, i, arr) => {
    return arr.indexOf(arr.find(t => t.id === thing.id)) === i;
});

key-value-dictionary.ts

export interface IData {
    [ key: string ]: string;
}