michael@0: // A for-of loop over an array stops at the new end of the array if it shrinks during iteration.
michael@0: 
michael@0: function ispal(arr) {
michael@0:     for (var v of arr) {
michael@0:         if (v !== arr.pop())
michael@0:             return false;
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: assertEq(ispal([1, 2, 3, 4, 3, 2, 1]), true);
michael@0: assertEq(ispal([1, 2, 3, 3, 2, 1]), true);
michael@0: assertEq(ispal([1, 2, 3, 4, 2, 1]), false);