Init from given files

examples/js/distances/numeric.js

@@ -0,0 +1,8 @@
+/**
+ * Check if the object (string, number, etc.) contains a number.
+ * @param  {object}  n - object to check.
+ * @return {Boolean}   true, if it is a number, false otherwise.
+ */
+function isNumeric(n) {
+  return !isNaN(parseFloat(n)) && isFinite(n);
+}