@technobuddha/library/compare/compare.mjs

A large library of useful functions

import isUndefined from 'lodash/isUndefined';
import isNull from 'lodash/isNull';
import isNaN from 'lodash/isNaN';
import toPrimitive from '../toPrimitive';
/**
 * Compare two objects
 *
 * @param a First object
 * @param b Second object
 * @returns 0 if a == b; -1 if a < b; 1 if a > b
 */
export function compare(x, y) {
    const px = toPrimitive(x, 'number');
    const py = toPrimitive(y, 'number');
    if (isUndefined(px) && isUndefined(py)) {
        return 0;
    }
    else if (isUndefined(px)) {
        return -1;
    }
    else if (isUndefined(py)) {
        return 1;
    }
    else if (isNull(px) && isNull(py)) {
        return 0;
    }
    else if (isNull(px)) {
        return -1;
    }
    else if (isNull(py)) {
        return 1;
    }
    else if (typeof px !== 'string' && typeof py !== 'string') {
        const nx = Number(px);
        const ny = Number(py);
        if (isNaN(nx) && isNaN(py))
            return 0;
        else if (isNaN(nx))
            return -1;
        else if (isNaN(ny))
            return 1;
        else if (nx === ny)
            return 0;
        else if (nx < ny)
            return -1;
        return 1;
    }
    if (px === py)
        return 0;
    else if (px < py)
        return -1;
    return 1;
}
export default compare;