Bump to v4.1.0.

_compareAscending.js

@@ -0,0 +1,33 @@
+/**
+ * Compares values to sort them in ascending order.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {number} Returns the sort order indicator for `value`.
+ */
+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;
+}
+
+module.exports = compareAscending;