equalArrays.js
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/**
* 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 {Function} equalFunc The function to determine equivalents of values.
* @param {Function} [customizer] The function to customize comparing arrays.
* @param {boolean} [isLoose] Specify performing partial comparisons.
* @param {Array} [stackA] Tracks traversed `value` objects.
* @param {Array} [stackB] Tracks traversed `other` objects.
* @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
*/
function equalArrays(array, other, equalFunc, customizer, isLoose, stackA, stackB) {
var index = -1,
arrLength = array.length,
othLength = other.length,
result = true;
if (arrLength != othLength && !(isLoose && othLength > arrLength)) {
return false;
}
// Deep compare the contents, ignoring non-numeric properties.
while (result && ++index < arrLength) {
var arrValue = array[index],
othValue = other[index];
result = undefined;
if (customizer) {
result = isLoose
? customizer(othValue, arrValue, index)
: customizer(arrValue, othValue, index);
}
if (result === undefined) {
// Recursively compare arrays (susceptible to call stack limits).
if (isLoose) {
var othIndex = othLength;
while (othIndex--) {
othValue = other[othIndex];
result = (arrValue && arrValue === othValue) || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB);
if (result) {
break;
}
}
} else {
result = (arrValue && arrValue === othValue) || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB);
}
}
}
return !!result;
}
module.exports = equalArrays;