baseCompareAscending.js

/**
 * The base implementation of `compareAscending` which compares values and
 * sorts them in ascending order without guaranteeing a stable sort.
 *
 * @private
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @returns {number} Returns the sort order indicator for `value`.
 */
function baseCompareAscending(value, other) {
  if (value !== other) {
    var valIsNull = value === null,
        valIsUndef = value === undefined,
        valIsReflexive = value === value;

    var othIsNull = other === null,
        othIsUndef = other === undefined,
        othIsReflexive = other === other;

    if ((value > other && !othIsNull) || !valIsReflexive ||
        (valIsNull && !othIsUndef && othIsReflexive) ||
        (valIsUndef && othIsReflexive)) {
      return 1;
    }
    if ((value < other && !valIsNull) || !othIsReflexive ||
        (othIsNull && !valIsUndef && valIsReflexive) ||
        (othIsUndef && valIsReflexive)) {
      return -1;
    }
  }
  return 0;
}

module.exports = baseCompareAscending;