44 lines
1.6 KiB
JavaScript
44 lines
1.6 KiB
JavaScript
var compareAscending = require('./_compareAscending');
|
|
|
|
/**
|
|
* Used by `_.orderBy` to compare multiple properties of a value to another
|
|
* and stable sort them.
|
|
*
|
|
* If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
|
|
* specify an order of "desc" for descending or "asc" for ascending sort order
|
|
* of corresponding values.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to compare.
|
|
* @param {Object} other The other object to compare.
|
|
* @param {boolean[]|string[]} orders The order to sort by for each property.
|
|
* @returns {number} Returns the sort order indicator for `object`.
|
|
*/
|
|
function compareMultiple(object, other, orders) {
|
|
var index = -1,
|
|
objCriteria = object.criteria,
|
|
othCriteria = other.criteria,
|
|
length = objCriteria.length,
|
|
ordersLength = orders.length;
|
|
|
|
while (++index < length) {
|
|
var result = compareAscending(objCriteria[index], othCriteria[index]);
|
|
if (result) {
|
|
if (index >= ordersLength) {
|
|
return result;
|
|
}
|
|
var order = orders[index];
|
|
return result * (order == 'desc' ? -1 : 1);
|
|
}
|
|
}
|
|
// Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
|
|
// that causes it, under certain circumstances, to provide the same value for
|
|
// `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
|
|
// for more details.
|
|
//
|
|
// This also ensures a stable sort in V8 and other engines.
|
|
// See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
|
|
return object.index - other.index;
|
|
}
|
|
|
|
module.exports = compareMultiple;
|