utils.js

export const Compare = {
    LESS_THAN: -1,
    BIGGER_THAN: 1,
    EQUALS: 0
};

export const DOES_NOT_EXIST = -1;

export function lesserEquals(a, b, compareFn) {
    const comp = compareFn(a, b);
    return comp === Compare.LESS_THAN || comp === Compare.EQUALS;
}

export function biggerEquals(a, b, compareFn) {
    const comp = compareFn(a, b);
    return comp === Compare.BIGGER_THAN || comp === Compare.EQUALS;
}

export function defaultCompare(a, b) {
    if (a === b) {
        return Compare.EQUALS;
    }
    return a < b ? Compare.LESS_THAN : Compare.BIGGER_THAN;
}

export function defaultEquals(a, b) {
    return a === b;
}

export function defaultToString(item) {
    if (item === null) {
        return 'NULL';
    } if (item === undefined) {
        return 'UNDEFINED';
    } if (typeof item === 'string' || item instanceof String) {
        return `${item}`;
    }
    return item.toString();
}

export const Colors = {
    WHITE: 0,
    GRAY: 1,
    BLACK: 2,
}

export function swap(array, a, b) {
    /* const temp = array[a];
    array[a] = array[b];
    array[b] = temp; */
    [array[a], array[b]] = [array[b], array[a]];
}
export function reverseCompare(compareFn) {
    return (a, b) => compareFn(b, a);
}

export function defaultDiff(a, b) {
    return Number(a) - Number(b);
}

export function createNonSortedArray(size) {
    const array = [];

    for (let i = size; i > 0; i--) {
        array.push(i);
    }

    return array;
}