Function equalArrays

test/babel.js:28310–28363

* A specialized version of `baseIsEqualDeep` for arrays with support for * partial deep comparisons. * * @private * @param {Array} array The array to compare. * @param {Array} other The other array to compare. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more detail

(array, other, bitmask, customizer, equalFunc, stack)

	 * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
	 */
	function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
	  var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
	      arrLength = array.length,
	      othLength = other.length;

	  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
	    return false;
	  }
	  // Assume cyclic values are equal.
	  var stacked = stack.get(array);
	  if (stacked && stack.get(other)) {
	    return stacked == other;
	  }
	  var index = -1,
	      result = true,
	      seen = bitmask & COMPARE_UNORDERED_FLAG ? new SetCache() : undefined;

	  stack.set(array, other);
	  stack.set(other, array);

	  // Ignore non-index properties.
	  while (++index < arrLength) {
	    var arrValue = array[index],
	        othValue = other[index];

	    if (customizer) {
	      var compared = isPartial ? customizer(othValue, arrValue, index, other, array, stack) : customizer(arrValue, othValue, index, array, other, stack);
	    }
	    if (compared !== undefined) {
	      if (compared) {
	        continue;
	      }
	      result = false;
	      break;
	    }
	    // Recursively compare arrays (susceptible to call stack limits).
	    if (seen) {
	      if (!arraySome(other, function (othValue, othIndex) {
	        if (!cacheHas(seen, othIndex) && (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
	          return seen.push(othIndex);
	        }
	      })) {
	        result = false;
	        break;
	      }
	    } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
	      result = false;
	      break;
	    }
	  }
	  stack['delete'](array);
	  stack['delete'](other);
	  return result;
	}

	module.exports = equalArrays;