balazsbotond/eslinq

"use strict";

export const owners = [
    { name: "Kathy", pets: ["dog", "cat"] },
    { name: "Johnny", pets: ["monkey", "spider"] },
    { name: "Annie", pets: ["monkey", "cat"] }
];

export const identity = n => n,
    double = n => n * 2,
    even = n => n % 2 === 0;

export function constantTrue() { return true; }
export function constantFalse() { return false; }

/**
 * An `Iterable` that throws an error when it is being iterated.
 *
 * Can be used for testing lazy evaluation.
 */
export class ThrowingIterable {
    constructor() {
        this[Symbol.iterator] = function* () {
            throw "This Iterable should not be iterated";
        };
    }
}