fix(table): allow filtering on false values and sorting date objects. F…

…ixes #2485 (#2544)

src/components/table/table.js

@@ -35,11 +35,12 @@ function sanitizeRow(row) {
 // becomes
 //   'one 3 2 zzz 10 12 11'
 function toString(v) {
-  if (!v) {
+  if (typeof v === 'undefined' || v === null) {
     return ''
   }
-  if (v instanceof Object) {
+  if (v instanceof Object && !(v instanceof Date)) {
     // Arrays are also object, and keys just returns the array indexes
+    // Date objects we convert to strings
     return keys(v)
       .sort() /* sort to prevent SSR issues on pre-rendered sorted tables */
       .map(k => toString(v[k]))
@@ -64,7 +65,11 @@ function recToString(row) {
 function defaultSortCompare(a, b, sortBy) {
   a = get(a, sortBy, '')
   b = get(b, sortBy, '')
-  if (typeof a === 'number' && typeof b === 'number') {
+  if (
+    (a instanceof Date && b instanceof Date) ||
+    (typeof a === 'number' && typeof b === 'number')
+  ) {
+    // Special case for comparing Dates and Numbers
     return (a < b && -1) || (a > b && 1) || 0
   }
   return toString(a).localeCompare(toString(b), undefined, {