Bump to v4.0.0.

internal/compareAscending.js

@@ -1,16 +1,33 @@
-import baseCompareAscending from './baseCompareAscending';
-
 /**
- * Used by `_.sortBy` to compare transformed elements of a collection and stable
- * sort them in ascending order.
+ * Compares values to sort them in ascending order.
  *
  * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @returns {number} Returns the sort order indicator for `object`.
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {number} Returns the sort order indicator for `value`.
  */
-function compareAscending(object, other) {
-  return baseCompareAscending(object.criteria, other.criteria) || (object.index - other.index);
+function compareAscending(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;
 }
 
 export default compareAscending;